19trax95's 1986 CUCV M1028A1

Put some better clamps on the exhaust today. The passenger side had a small leak at the clamp since I reused the old ones.

I also finally installed my washer pump. Even though the truck is a 1986, GM used the 1984 spec when building the CUCV trucks. Which means the washer pump is built in to the wiper motor. They are failure prone and just aren't the best. So last year I bought a pump for 86, but it is basically just a generic acdelco washer fluid pump. I drilled a small hole in the bottom of the fluid tank, pressed the rubber seal in, and pushed the pump in there.

I then extended the harness from the original power and ground for the washer pump solenoid, and connected it to the new pump. I had to install a new section of hose since the original was too large for the pump. I had a spare section of fuel line around so I used that.

For now I'm just using the old pump to split it to the two nozzles. It doesn't leak so I'll likely leave it like that unless it presents an issue down the road.

Welp, I consider today to be a win.

Spent about 4 hours at the junk yard with my buddy. I left with a bench seat, steering wheel, and rear view mirror.

The GMT400s were plentiful in various states. Most were pretty beat and picked clean. But I found two options for seats. Actually right across from one another. The first was a 1988 c2500 with a bench with armrest. Next option was a 97 crew cab dually with a vinyl bench front and rear seats. I opted for the first truck. There were a bunch of others but none quite as clean as this one. It is red, which isn't my first choice, but I can make it work.

The steering wheels were a dime a dozen. First I found a base model gmc. I pulled that wheel. Then right on the next row I found a silverado with the leather wheel and Chevy horn pad. So I swapped those out.

I then grabbed a mirror out of a random gmt400 I found on the way out.

My buddy got a mint bench seat for his 79 Ford as well as some hvac controls for his car. View attachment 953707
View attachment 953709

I took my turbo to work and got some new mounting studs and nuts for it. I also removed the two old studs that were in there yet.

Turns out the turbo studs off a maxxforce DT fit lol. It's an m10x1.5 in the turbo flange. Then the new studs are m10x1.0 on the nut side. The old ones were M10x1.5 on both ends.

Only potential issue is the nuts are a flanged 15mm head. So they may hit the manifold. I'll need to test fit it.

If they hit, I have some out of a Cat 3126 that are a 14mm, non flange pinch nut. I know they will clear.

Also the turbo shaft has been soaking in CLP for the last few months. Safe to say the carbon is gone now. Just had to wipe off the remaining little bit. Now I can finally clean up the shaft and center section of the turbo and assemble the new bushings and all. I may paint the compressor housing. If I thought I'd last I'd paint the turbine housing. But there's just too much heat there. And I'm not spending the money to get them ceramic coated.

Well exhaust temps at the manifolds can reach around 1200⁰+ ideally lower though, especially on these motors lol. My duramax I've hit 1250⁰ on the dyno.

So in theory, a high temp paint like that should hold up. But it has a stainless heat shield that goes over it anyway. So I may just paint that black with some exhaust paint.

CLP is a gun cleaner. It's a oil like fluid that helps soften and remove carbon build up from firearms. But as it turns out it also works for exhaust carbon. Which makes sense because the two are very similar.

I got the turbo all rebuilt and dry fit. I just need to pop the front plate off the compressor side and seal it up, seal and install the compressor cover (after I paint it), and then install the whole thing onto the exhaust housing.

The waste gate will be modified a bit as far as mounting goes. I want to change it so I can manually adjust the PSI at which it opens.

The rebuild kit I got was a bit confusing for two reasons, one of which is the fact I took it apart over the summer and didn't remember exactly how it went back together, and two, it's for all the turbos, GM3 (this one), GM4, GM5, GM6, and GM8. So the seal rings didn't match up exactly. I did reuse one of the old ones. It should be OK, but if not, at least it's on the easier side to remove so I can be done on the truck if need be.