mydatsunroadster.com

mydatsunroadster.com chronicles the restoration of my 1968 Datsun 2000 Roadster.

28 July 2005

 

Exhaust--Out with the Old

Next I removed the exhaust from the frame. I had already detached the exhaust manifold when I removed the engine, so the only connections to the frame that remained were the exhaust hangers and the fact that the exhaust actually feeds through a hole in the crossmember of the frame. I don't know if this is the original exhaust, but I don't think it is because it is missing the distinctive "megaphone" tip. It is quite rusty, though, but that is fairly typical of an exhaust.

Here are a couple of pictures of the rear and mid-sections of the exhaust, where it runs up over the rear axle.




I began at the rear of the car, removing the nuts that held the brackets welded onto the exhaust to the frame's exhaust hangers, which had rubber blocks to make them flexible. I removed the nuts using a 13 mm socket. There were two sets of hangers, one at the very back and one just in front of that one.




Moving towards the front of the car, the exhaust then feeds through a hole in the frame's X-shaped crossmember. I removed the nut from the rear of a pair of straps of metal holding the pipe in place.




Then I used what is, in my experience, the single most useful tool for demolition work, my crowbar, to pry up the rear section of the metal strap and then the front section to expose the other nut.




I then removed the other bolt and pried up the strapping to free that section of the exhaust pipe.




Between the two pieces of the frame crossmember was a resonator that was clamped into place between the two straight pipes. I removed the clamps by loosening the nuts using the 13 mm socket.




With all the rust, however, I was unable to remove the pipes from the resonator. So I used what is, in my opinion, the second most useful tool in demolition, my reciprocating saw to cut the resonator out.




At the front, where the exhaust mounts into the manifold, there is another bracket on the frame. However, the exhaust was not connected to this bracket. This was probably to allow the engine to move a bit without tearing the exhaust free, as there was no section of flex-pipe.


With the resonator, which was clearly too wide to pull through the holes in the frame, cut out and all of the exhaust-mounting brackets disconnected from the pipes, I was able to pull the whole exhaust off the frame.




As you can see below, the existing exhaust had an external diameter of 1 3/4". This 2-liter engine begs for more exhaust flow than that.



 

Frame Pads

This afternoon I got started on stipping off the pieces remaining on the frame. I need to strip down the frame in order to clean it up and get it sandblasted and painted. I started with the frame pads, originally made out of horse hair, that cushion the body against the frame. Here is a picture of the frame with all of the components remaining attached. Also to the right is a picture of the VIN stamped into the frame, which is located at the front right of the frame just next to the engine on the driver's side.




The horse hair frame pads I mostly removed by scraping under them with a putty knife. I wore gloves because there is a lot of rust and grit and, although I had a tetanus shot a couple of years ago, no good can come of cutting your hands with rusty metal.




This page from 311s.org has a good diagram of where all of the frame pads are located, which is especially useful when putting the car back together when the pads will be long-forgotten. After removing the frame pads I started pulling off the rubber squares at the location of each frame-to-body bolt. The rubber squares have holes in the middle through which the bolts go.




I also removed the rubber squares by working the putty knife underneath and prying upwards. The squares towards the middle of the car were mounted onto the frame by these metal clips that slid onto brackets on the frame.




I pulled off all of the brackets as well.


Here is a look at all of the rubber squares and the metal frame clips.





 

Engine on its Stand

This afternoon I hoisted the engine up onto the engine stand. My plan is to pull the cam cover and have a look underneath and, assuming everything appears to be fine inside, nothing more. I would like to clean and detail the outside of the block and head and probably paint the cam cover an original color.

I found some bolts at Home Depot that fit the mounting holes for the bellhousing into the block. I took a bellhousing bolt to the store to find the closest match and bought two sets of bolts. The ones that turned out to fit were 10 mm 1.5 bolts. I got 100 mm lengths, which were sufficiently long and tightened down nicely with three washers on each bolt to keep everything tight.


So I hoisted the engine up to about the level of the engine stand, then removed the black mounting bracket from the stand in order to start bolting it to the block. With the mounting bracket bolted loosely to the block I then worked the black bracket arm back onto the red engine stand and worked the alignment pin back through both pieces.




The engine number is located at the top of the block between the second and third cylinders, atop a protruding tag pieces. It is located on the non-manifold side, shown above right. Unfortunately my engine number is nearly impossible to read, having been worn down or ground off the block.

 

Dashboard Prep

This morning I spent some time readying my dashboard to be sent off for restoration. This entailed removing all of the bits and pieces, such as knobs and gauges, so that the dash foam and covering can be replaced.

I've decided to go with Dashboard Restorations to rebuild the dash. I'm committed to a fully restored dashboard because it will be such a focal point of the new interior. I've checked around and Dashboard Restorations had the most reasonable prices and has experience doing roadster dashes. Additionally, a number of folks from Classic Z Car club had their dashes restored by Dashboard Restorations and had very positive feedback.

Here are pictures of the assembled dash, front and rear.




I began by removing the two dash vents blow air upwards out of the top of the dash that defog/defrost the winshield. I used an 8 mm wrench to remove the nuts from the studs that are attached to the dash. There are two vents and two nuts on each vent.




Then I removed the clock. It was held in place by two nuts. I used a 10 mm socket with an extension to remove both of the nuts. With the nuts removed the clock came right out.




Then I removed the two metal brackets at the bottom of the dash, below the clock, that the heater mounts to. These brackets were each attached by two bolts which I removed using a #2 Phillips head screwdriver.


Then I removed the oil pressure/temperature/fuel/amperage gauge. It was attached by two wingnuts, which I loosened using a pair of pliers.




The tachometer and speedometer I removed the same way, moving from left to right across the back of the dashboard and removing the wing nuts.




Next I removed the "S-brake" light. It simply unscrews from the back of the dashboard.




And I removed the knob that controls the brightness of the guage lights. I had removed the knob prior to pulling the dash, so I just needed to remove the small nuts that held from the back of the dash (using a 5.5 mm socket) and pull it out from behind. Then I went to work on the trip odometer knob. It was fastened to the rear of the dash, also by two 5.5 mm nuts mounted on studs in the dash itself.




With the small nuts removed I could pull the bracket that held the odometer cable to the dash away (that cable connects to the speedometer). I then popped the knob off the front of the dash and used a flathead screwdriver to pry the post back through the rear of the dash.




Inside the glove box where two bolts, one on each side, that held the cardboard box in place. I removed these using a #2 Phillips head screwdriver. Then I removed the four knobs off the top of the dash using an 8 mm wrench.




Finally, here is a picture of the stripped dash, ready to be sent off for restoration. It will get new, crack-proof foam and a new space-age vinyl covering.



27 July 2005

 

What Happens in Vegas Stays in Vegas

Today I sent my carburetor bodies off to Keith Williams, jedi master of Japanese SU carburetors, in Las Vegas to have the throttle shaft bushings repaired.

 

Carb Disassembly

Today I pulled apart my carburetors. I plan to clean them up and replace a lot of the parts, essentially do a full re-build. I need to pull them both totally apart in order to send the bodies off to Keith Williams, who has agreed to rebuild the throttle shaft bushings which tend to wear out over time preventing the butterflies from closing completely.

If I weren't sending off the carb bodies I would only disassemble one at a time so I'd have a working model in front of me making it easier to put them back together. I think I have enough guidance from my manual and the ZTherapy videos to get them back together, though. I will also probably send out some of the parts to be replated in yellow zinc to make the carbs look brand new.

Here is my box of supplies. It includes my hand tools, a couple of cans of Berryman's B-12 carb cleaner (very good stuff, less than $6 a can at Walmart), lots of paper towels, and a pair of safety glasses and rubber gloves to keep the carb cleaner out of my eyes and off my skin. I set up a work table on two sawhorses using a sheet of plywood that I placed inside a garbage bag so the wood wouldn't end up soaked in carb cleaner. Also here' s a shot of one of the carburetors before I started.




First I removed the throttle return spring, which I will replace with new ones from Keith Williams.


I began dissassembling the carbs by unscrewing the dome plunger from the top of the dome, making sure I got the plunger gasket that fits around it.




Next I unbolted the four bolts that hold the dome to the body using a #2 Phillips head screwdriver. I pulled off the dome and set it, along with the large suction spring, aside.




Then I slid out the piston and began unbolting the cover from the float chamber.




I pulled off the float assembly and removed the float chamber lid gasket, which I will replace with a new one from Nissan along with all of the other gaskets. Then I set aside the float chamber and went to work on the carb body.




The way the choke works on the carburetor is this: pulling the choke knob inside the car pulls the choke cable that pulls back on an arm that causes the nozzle on the bottom of the carburetor to move up and down. As the nozzle moves up and down on the tapered needle, more or less fuel is allowed into the fuel/air mixture. I next removed the bolt that connected the spring-loaded actuating arm to the nozzle.




The nozzle is connected to the float chamber, which holds the fuel, by a fuel pipe that I had to remove in order to release the nozzle.




The nozzle rides only as high as the idle adjustment mechanism allows it. This is a spring-loaded bolt that goes up and down when you turn it. The bolt is mounted to a sleeve that threads into the carb body; it is through this sleeve that the nozzle rides up and down. I removed the idle adjust bolt by hand and the sleeve using a 19 mm wrench.




Next I began removing the throttle adjustment arm from the body. First I released the spring that returns it to position and then I used a 12 mm socket to remove the mounting bolt.




Then I pulled the assembly off the body. It is composed of many pieces.




I then removed the float chamber from the carb body. I removed the nut from the end of the mounting bolt that feeds through the carb body using a 10 mm socket. Then I pulled the float chamber off the body with the mounting bolt, which threads into the float bowl, intact.




At the bottom of the float chamber is the fuel pipe connection. I removed this using a 12 mm wrench.




Opposite the fuel pipe fitting is a drain bolt. I also used a 12 mm socket to remove it.




Then I removed the bolt that mounts the float chamber to the carb body. I used a 14 mm wrench and a lot of force to get it off.




Next I focused on the float chamber lid assembly, that holds the actual float. The float moves up and down with the fuel level and operations a float nozzle above it that allows more fuel to enter the chamber when necessary and shuts off the fuel supply when the chamber is full. The fuel inlet had two halves which I separated by removing two Phillips head bolts.




With the inlet separated into two pieces, I then removed the banjo bolt (using a 17 mm socket) and the small screen filter inside it.




I then removed the float by sliding out the mounting pin. I removed the float nozzle using a 10 mm socket.




Then on the float side of the body I removed the throttle plate and the nut on the end of the throttle shaft using a 12 mm socket.




From the piston I removed the needle by loosening the set screw on the side and then I made sure to pull out the plastic washer that sits at the bottom of the piston shaft.




Essentially that completed the disassembly of the carburetors into seven pieces (six for the carb not shown). I spent some time cleaning up the aluminum pieces inside and out using the carb cleaner. I used two full cans, but the pieces got fairly clean.





26 July 2005

 

Removed the Transmission from the Engine

After removing the engine and transmission from the frame I need to mount the engine on my engine stand and do some work on the transmission. This necessitates removing the transmission from the engine block.

I began by draining the transmission oil. Before removing the drain plug it is always a good idea to make sure you can remove the fill plug in order to be able to refill the transmission. The fill plug was located towards the back of the bellhousing on the driver's side. I removed it with no problem using a 20 mm socket. Then I replaced it again.




The drain plug was located underneath the bellhousing, also towards the rear. I removed it using my 1/2" drive ratchet with no socket.




This picture is out of focus, but it shows the drain plug after I removed it. The plug is magnetized to catch any metal shavings or metal dust that grind off the gears when the transmission is operating. Mine had a few rather large chunks of metal and lots of shavings attached to it. As I've said before, the shifting was very sloppy on the car when I drove it. I cleaned off the plug and replaced it after the oil had drained.


The transmission bellhousing is connected into the engine block by a grand total of six bolts. Four of these are large bolts around the perimeter of the bellhousing. I removed each of these using a 9/16" socket.


The other two are smaller bolts at the bottom of the bellhousing. I removed these using a 1/2" socket and a 1/2" wrench to hold the bolts from spinning.




At this point the transmission was disconnected but didn't want to come free. The starter was bolted into the bellhousing from the front, so I decided to remove it in case that was what was holding the two pieces together. The starter is just held on with two bolts which I removed using a 14 mm socket.




The starter came right off with those bolts removed. You can see below, right the gear on the starter motor that engages the teeth around the edge of the flywheel to get the car started.




A couple of taps with the mallet and a bit of prying and I heard that satisfying "thunk" of the transmission coming off the engine.


I slid the transmission off the crankshaft and put is aside for now.




The pressure plate and clutch disc were held in place by six bolts that I removed using a 13 mm socket. The flywheel wants to turn when you try to loosen these bolts, but I was able to either (1) hold the flywheel in place using downward force at the time I turned the wrench or (2) use a quick bump on the wrench to work the bolt loose while inertia held the flywheel in place.




You can see how worn the clutch disc is. I think a new clutch is in order when I put this all back together. Below, left is a shot of the flywheel.





25 July 2005

 

Pulled the Engine

This afternoon I pulled the engine and transmission off the frame. It was difficult, especially removing the bolts from the transmission mount, but I can imagine that it was infinitely easier than doing so with the body still on the frame.

The engine mounts are located on either side of the block a bit closer to the front of the engine than mid-way. The mounts have studs that protrude through rubber blocks and nuts that hold the engine to the mount. I started on the passenger side, removing the two engine mount nuts using a 14 mm socket.




One the driver's side is a similar set-up but the nuts weren't recessed as far down.




The transmission mount is located at the front of where the "X" of the frame comes together. There are two bolts that mount through the frame into the gearbox from below, one on each side.




I removed these bolts using a 17 mm combination wrench. The area was too narrow top-to-bottom to get a socket in there and I don't have a 17 mm wratcheting wrench. It took a lot of time and sweat to remove these bolts. Note to self: buy a 17 mm wratcheting wrench before re-installing the transmission! I looked around the engine and found one hose still connected to the frame. Everything else appeared to be free.




So I hooked up the chains of my hoist to the brackets that came attached to the engine (this engine has clearly been out in the sun before--I know it has been rebuilt once by the PO) and started hoisting. The engine came free after a little hesitation and there were no connections I'd missed. If you look closely at the picture below, right you can see some of the coolant that spilled out of the block upon hoisting the engine. It seems like there is always more coolant hiding somewhere and just waiting to spill on your shoes.





Once it was airborne, I backed the hoist up into the garage to lower the engine and transmission on some wood blocks.




Here is a close-up of the transmission mount. Below are some shots of the frame with the drivetrain removed.









 

Driveshaft

This week I am off from work for a bit of a summer vacation. I don't have any travel plans and hope to spend some of these days making some progress on the roadster. I need to start pulling pieces from the frame so that I can clean it up and eventually paint it. The frame is covered in a thick coating of grease, dirt, and road grime. Although there is some flakes of rust, overall the frame is very solid.

This morning I began by removing the driveshaft. The driveshaft transfers the engine's rotating motion from the crankshaft through the transmission back to the differential, which then spins the rear axel and tires. The driveshaft is connected to the transmission and the differential by four bolts at each end.




I removed all four of the bolts using a 12 mm wrench and a 12 mm wratcheting wrench to loosen the nuts. Then I dropped that end of the driveshaft, which is hinged at each end allowing it to pivot out of the way.




Here is a shot of the end of the differential where the driveshaft mates to it.


Next I proceeded to the connection between the driveshaft and the transmission. It was connected by four of the same-sized bolts.




I removed all four of the nuts and bolts using two 12 mm box wrenches. Below, right is a picture of the transmission where the driveshaft connects.




Then the driveshaft was entirely removed. I put it aside for cleaning and painting. The shaft actually is composed of two pieces that slide together with groves and teeth to prevent one section from spinning on the other.





24 July 2005

 

Manifolds

This afternoon I removed the intake and exhaust manifolds from the engine. Although it took some time, it was much easier given that the body is off the frame. Even so, some of the bolts were difficult to reach.

Mounted on the intake manifold are the carb spacer blocks and then the carburetors and the air filter assembly.


There were two hoses that feed engine coolant through the intake from right to left.




I removed both hoses by first loosening the hose clamps with a philips head screwdriver. Also, on top the manifold is the bracket that the choke cable actuates to operate the carbs.




I freed the choke cable from this bracket by loosening the philips head bolt that tightens the upper cable bracket and then loosening the lower bolt that holds the end of the cable. I used a 3/8" socket on the lower bolt.





I then began removing the nuts that hold the intake manifold on the head-studs. I started with the middle and worked outwards using a 13 mm socket.




After I removed those four nuts the manifold didn't want to come off, so I started removing the bolts for the exhaust manifold, not sure if there were some fasteners that held both manifolds in place.


I removed the top outside nuts using a 13 mm socket and the top inside nuts using a 13 mm wratcheting wrench because the choke bracket prevented me from getting a socket in there.




There were two lower nuts on the outside of the two inner exhaust runners. I was able to remove these using a 13 mm socket with a long extension.




Tucked-in just behind the outer exhaust runners were two more studs (one each side). The manifold prevented me from getting a socket in there to loosen those nuts, or even a wratcheting wrench over the end of the stud. I had to use a box-end 12 mm wrench to loosen the nuts, and it was slow-going.




But that completed the removal of the hardware connecting the intake and exhaust manifolds to the head. The exhaust manifold had three (at first I assumed there were just two, but there were three) bolts attaching it to the exhaust pipe. I removed each of these using a 14 mm wrench and a 14 mm socket with an appropriate extension.




Then I was able to work the intake manifold off the studs.




And next I pulled the exhaust manifold off.




I took both manifolds out to my stripping station. I then realized that the exhaust manifold is covered with some sort of high-heat coating that is bonded to the metal (it is made of cast-iron while the intake manifold is aluminum). I will probably either leave it as-is or coat it with another high-heat coating because there are some voids in the finish. I did apply a coat of stripper to the intake, which appeared to have the same paint as the heat shield.




The intake manifold cleaned up nicely but will need another round of stripper to be fully clean. Note the shiny copper plugs on top of each side.



Once I've stripped the remaining paint the manifold will match the rebuilt carbs (once I rebuild them).

 

Heat Shield Paint Removal

This morning I spent some time stripping the paint off the intake heat shield. Both the heat shield and the intake manifold are covered in an off-white paint that I want to remove to give those pieces a more original appearance.

Paint stripper is toxic, so I set up a table covered in a garbage bag so I could dispose of the left-over stripper and the stripped paint easily. I cut the bottom and one edge of a large garbage bag and then just draped them over the plywood surface I had placed across two sawhorses. I wore safety glasses and gloves at all times when handling paint stripper. I bought a gallon of "aircraft stripper" by KleenStrip at Walmart for under $14.





I applied the stripper using a cheap 2" paintbrush. It is best to apply the paste liberally but to apply it only in one direction rather than going over it more than once. That way the stripper seals to the paint and can go to work. Almost immediately the paint began to shrivel off the metal heat shield.





I allowed the stripper to work for 30 minutes and then returned to remove the paint using a plastic scraper. The paint came of very easily--this KleenStrip is good stuff. I also used a small brush with brass bristles to get into some of the crevices.






I'd like to get the heat shield plated in yellow zinc so it looks original again.

16 July 2005

 

Body Off!!!

This afternoon I used my new hoist to lift the body off the frame and put it onto the rolling body stand I built previously. This is a pretty significant milestone in this project. There were a couple of surprises and it was pretty hectic maneuvering the body around at some points, but in the end we were successful.

I began by moving the body stand up close next to the car. Then I moved the hoist into place from the right rear of the car, with the long legs of the hoist straddling the right rear wheel. I attached the load-leveler to the hoist hook and attached the two lifting chains to either end of the leveler. The chains I bolted into the body through the holes for the factory rollbar. I used the two 5/8" body/frame bolts that were located in the trunk because they were a perfect fit.




I started pumping the hoist and the body began to lift in the back. At first it didn't budge, but after a few pumps there was a satisfying "clunk" and up it went.


Unfortunately the rear end seemed to be caught and the wheel began to lift off the ground. I quickly lowered the hoist. Underneath I saw that the culprit was the emergency brake cable. Apparently where I disconnected the cable was not sufficient and there was another connection of the cable to the body. I disconnected the cable by removing a cotter-pin that fed through a post and then removing the post that held the cable in place. That did it.




So I continued the hoisting. I noticed that the rear was lifting but the front was not. At first I thought that the rearward chain mounting points were just to far back and the rear would lift more than the front. However, after a while I noticed that there were a couple of connections in the engine bay that I had missed that were tying the body to the frame. These included a coupling for a coolant line (I think) and an electrical ground to the frame. I removed these connections but there was still something remaining. It turned out to be an oil line feeding the transmission. I disconnected this using a 3/8" socket wrench on the manifold in the engine bay.




With those lines disconnected the body came fully free. I didn't (or couldn't) take any pictures of the intervening dance that resulted in getting the body up and over and onto the body stand. Anyone who has done this before themselves will know that it is quick and simple, especially on a 94 degree day (yeah right). Here are some pictures of the body up on the stand.






Here are shots of where the body rests on the cross pieces of the stand. The dimensions of Mark Sedlack's plan are just perfect.




I finally am able to get a good look at the frame! It is filthy, as I'd expect. The frame seems to be very solid with some surface rust.










In addition to the other things I have going on I next need to get the frame prepared for sand-blasting and the body ready for bodywork and eventually painting.

 

Braces

I spent the morning building some braces to hold the door-gaps to prevent the body from twisting or wracking when I remove it from the frame. Originally I had bought 3' lengths of 1/2" pipe, but the door opening is about 37 1/2" wide, so I needed a bit more length.

So I made another trip to Home Depot and bought three 12" lengths of cast iron 1/2" pipe and a pair of couplings (for each side). For the ends I bought two floor joints, which are essentially small discs that mount onto the end of the pipe. The theory of using shorter lenghts of pipe with the couplings was that I could adjust how tight the pipe was screwed into the couplings, and thus control the overall length of the whole assembly. I chose one standard coupling and one t-joint coupling, because it was about an inch longer than the standard ones.


Upon assembling the pieces for the first brace, I realized that, even after I tightened down the pipes into the couplings and end-pieces, the brace was too long; around 39".




So in order to reduce the length of the brace I had to tighten the pipes further into the couplings. I screwed the end bracket (disc) into a scrap of 2x6 and used a mallet to pound on a length of pipe fed into the t-joint in order to get it tighter. Eventually I screwed the other end disc into a longer 2x4 and stood on the bottom 2x6 while I spun the top 2x4 to get enough leverage to tighten it to the point where the brace was about 37 1/2" long. I also put some dish soap on all of the threads to lubricate them. If I did this again I would use a 24" length of pipe plus a 12" length and only one coupling.




I then removed the door latch catch, which is held in place by three philips head bolts on the rear jamb.





I fit the braces in place spanning from the recess for the door hinges and the area where the catch goes. The braces are held in place by the force they push outwards; no bolts or welds.




In general the braces work pretty well. They are like reverse pipe clamps where the force is exerted outward from the ends of the pipe when you twist the pipes off the couplings.

15 July 2005

 

Hell on Wheels

Well I did make it to Harborfreight today and bought some casters to put on the engine stand I built for the body. The casters themselves each are rated to hold 330 pounds, for a total capacity of 1,320 pounds, which should be sufficient to hold the weight of the wooden stand and the body with no problem. Regularly $5.99, I got these 4" casters on sale for $2.99 each. I bought some hardware from Home Depot, including 2" 5/16" bolts, nuts, and some wide 5/16" washers.




So on each corner of the body stand I marked some holes, using the upside-down caster as a template. Then I drilled some 3/8" holes for the bolts.




With four holes for each caster, I propped each corner up using some 2x4 scraps stacked together. Then I fed the bolts up through the caster and holes and bolted a washer and nut down on the top of the wood to secure each caster.




Now the body stand is on wheels. It is pretty solid and rolls fairly easily. This is going to make doing this project in a smallish two car garage much easier.



 

Hoist and Engine Stand

Today I obtained a hoist and an engine stand, two pieces of equipment I will need for this project and most likely many future projects. This morning I decided to check Craigslist to see if there was a used hoist for sale before heading over to Harborfreight to buy a new one. There was one for sale for $60 and I sent an e-mail to inquire about it.
Then I decided to check the online classifieds in the Austin American Statesman. Well there was an ad placed just today for a 2-ton hoist and a 1-ton engine stand for sale for $175. The ad noted that both would fold-away for easy storage, which was just what I needed. No phone number was listed but an e-mail address was there. So I inquired by e-mail. Well, I heard back in a matter of minutes that the seller would be around in the afternoon and I could go by and check out the set-up.
So I went by in the early evening and met Jerry (the seller), who was very nice. He had restored a 1971 Chevy truck in the last year and then sold it and was looking to move some of the tools out of his garage. Both the hoist and the engine stand were very high quality and in excellent condition. Jerry even helped me load them up and I took both on the spot.
I'm pretty pleased because I saved some money and got a couple of quality pieces.





11 July 2005

 

Carburetor Parts Arrive

Today in the mail I received the parts I ordered from Nissan to rebuild my carburetors. Last week I received a pair of nozzles and float valves that I ordered from Z-Therapy (those parts are NLA from Nissan), shown below left. From Nissan I received the following: new floats, new fuel pipes, banjo bolts, filters, needles, and gasket kits.





10 July 2005

 

Body Bolts

I spent the remainder of the day removing the bolts that connect the body to the frame. There are a total of fourteen bolts located in seven spots (one on each side of the car). I began at the front of the car and worked my way back. First I sprayed each bolt with some Liquid Wrench and allowed it to soak in. I had little trouble removing the bolts and only a couple were rusted.

The first pair of bolts was located at the front of the car, just behind where the grill sits and just below where the hood hinges are located. I removed these using a 3/4" socket.


The next bolts were located in the engine bay, about midway back. I used a 9/16" socket to remove these.


Then on the interior there was a pair of bolts just behind the firewall on the floor. These were slightly rusted so I ended up using a crescent wrench when the 9/16" socket seemed to be slipping.




Also on the interior there were two more pairs of bolts; a couple located just where the seats go and a pair back on the shelf area by the rear wheel wells. I removed all four of these using a 9/16" socket.




Just behind the rear wheels there were bolts through the fender into the frame. I used a 3/4" socket on the nut and a 3/4" wrench to hold the bolt head from spinning when I removed these bolts.




Finally there was a pair of bolts located in the trunk. I used a 5/8" socket to remove these. Below right is a shot of all of the bolts that held the body to the frame.




With all of the components that mechanically hold the body to the frame removed, I took several pictures of the body still mounted on the frame. Just a couple of more things to do before the body will be liberated.























 

Wiring Harness, Part III

Today I removed the third and final piece of the wiring harness, the rear portion that powers the tail lights, reverse light, and license plate lamp.

First I removed the single reverse lamp, which was connected to the frame by two 7/16" bolts. When I first bought the car I thought that the other reverse lamp must be missing but soon discovered that there is only one (left) reverse lamp on these quirky little cars.


Then I began freeing up the harness from the frame. I previously disconnected all of the rear lights, all that remained was to remove the harness itself. The harness was held to the frame by several clips that cinch together and hold the harness. I pried these apart using a flat head screwdriver and left the harness dangling as I moved from the rear of the car towards the front. Two clips were located behind the rear wheel but I was able to reach them without removing the wheel itself.




Similarly the harness ran the length of the frame on the driver's side with a clip every twelve inches or so. It fed through the holes in the frame where necessary.




Towards the front of the car, just before reaching the front wheel, the harness went through the frame and turned upwards and tucked into the engine bay.




The rear harness connected into the main harness where the front harness branched off the dash harness. I was able to disconnect it here and pull the rear harness free out towards the back of the car.




This completed the removal of all three wiring harnesses. Here is a shot of how they all link together.



There are a lot of connections but the whole thing is still fairly simple by new car standards. At the very least I am going to clean up the wiring harness and may end-up re-wrapping the whole thing in new electrical tape.

03 July 2005

 

Body Stand

I spent the afternoon building a stand to hold the body of the car up so it will be easy to work on and so I can move it away from the frame to work on that. I got the plan from Mark Sedlack's website, and followed it to the letter with just a couple of additions to suit my particular situation. One thing, although his parts list on the plan says you need five 2x6s, I count that you actually need six (two for the four uprights, two for the base pieces, and two more for the cross-pieces that the body rests on).

In any case I know of a few people who have used his plan so it is proven to hold the weight of the body. I'm planning to put mine on some heavy-duty casters so I can wheel it around so I'm adding a couple of lateral cross-braces. I began with a stack of lumber.




Two of the 2x6s I cut in half to act as the four upright pieces. I made a jig by drilling two holes into a scrap of 2x6. Then I drilled two sets of 1/2" holes in each upright pieces so the pieces the frame rests on can be set at two different levels.





I cut down two more of the 2x6s to 92 1/2 inches to act as the bottom (foot) pieces. I nailed the uprights into each end of the foot pieces using sixteen penny nails. I also used the recommended L-brackets with some 1 1/4 inch screws to strengthen the insides of those joints.




I cut three of the 2x4s into angle braces to further strengthen the uprights. The shorter braces are 12" long on the short length, with 45 degree miter cuts on each end. They all came out of one eight foot 2x4. The longer angle braces are three feet long on the short length and two came out of two more 2x4s. I nailed the cross braces in place, making sure the brackets were square.




Next I cut the pieces that run laterally across the two assemblies I'd already built. Those 2x6s I cut to 74" in length. Using the same jig I drilled 1/2" holes in each end of both pieces. Those pieces bolt the two sides of the frame together with two 4" long carriage bolts with washers and nuts. I finished up the stand with several more L-brackets and screws to secure the 90 degree joints.




Since I intend to put casters at the four corners of the stand, I added a piece for lateral bracing on one end. I secured a 74" 2x4 using four 3" screws at each end plus some more L-brackets. The other end I will leave open but may fashion some sort of temporary bracing in that direction. This piece really tightened up the end of the stand.





Now the structure is complete and I just need to find some casters with wheels to bolt onto the bottom.

 

Odds & Ends, continued

This morning I continued what I began last night, removing more of the hard lines the connect controls on the body to the power train and/or frame.

I started with the brake lines. Hard (metal) lines connect the master cylinder to the wheel area, where soft (rubber) lines connect to the brakes themselves. As the hard lines are connected to the body, the point where they join the soft lines is an ideal spot to eliminate this union. I used a 7/16" box end wrench to loosen the coupling on the hard line and a 5/8" wrench to hold the coupling on the soft line from turning. I had to use some Liquid Wrench and a lot of persuasion to get the couplings apart. On the left side there was actually a different upper coupling and I used a 9mm wrench because the 7/16 was a bit too big.

I took the caps of the master cylinder brake fluid reservoirs to allow the lines to drain more freely. You can see how dark and dirty the brake fluid was!



Then I moved on to the rear brake lines. Actually there is one hard line that goes back to the center of the car, and then connects to a soft line that connects to another hard line that runs side-to-side on the car, feeding brake fluid to each wheel's drum brakes. I disconnected this first point where the hard line meets the soft line. It was not easy to access.

I jacked-up the rear of the car and put jackstands under the frame on the right and left sides. Then I slid under the car just ahead of the left rear wheel. Even when using jackstands I am always careful to prevent putting any body part under part of the car that could fall to the ground.

Below are two pictures of the connection I was working on. In the first you can see the leaf spring in the foreground. In the second one, which was shot after I sprayed on some Liquid Wrench, you can see the differential in the background.




I used a 7/16" wrench on the top coupling, attached to the hard line, and a 3/4" wrench on the bottom coupling attached to the soft line. I had to use a pair of vice grips to break the top one loose. Eventually it came off after a lot of turns.


Next I moved on to the clutch line. The master cylinder had a steel line that I followed down below where the oil pressure line connected (see post dated #2 July 2005#). You can see the clutch line below left, it is the dirty connection below the already-disconnected bronze oil pressure line. I disconnected the clutch line similarly to the brake lines, using a 9/16" wrench. I reached in from below to access the coupling because I couldn't get at it from the top. Still, my view of what I was doing was obscured by the frame.




As I did with the brake lines, I used a small drip container to catch the draining fluid. The clutch cylinder drained entirely.


I also disconnected the emergency brake cable at a connection about midway down the car on the passenger's side. I disconnected the lower, front cable from the assembly using a 7/16" socket to remove the outer nut and a 7/16" wrench to hold the longer inner nut from spinning.




Then I unbolted the longer inner bolt using the socket. I used a 1/4" box wrench to hold the flat portion of the cable-rod from spinning as I removed that nut.