Gotta do a Rebuild, Gonna Upgrade Too

[intergalactron]

Well aware lol, was just curious if yours had it. They didn't run this pump for that many years but yours obviously didn't have one or you would have seen it hanging off the engine.

I was unaware, but my dad says "your brakes are hydraulic" and I thought to myself "well, duh" but that must have been what he was alluding to.

 

[Geotrash]

I was unaware, but my dad says "your brakes are hydraulic" and I thought to myself "well, duh" but that must have been what he was alluding to.

Yes, they are hydraulic with vacuum assist. Normally, the engine intake creates enough vacuum to assist the brakes, but with AFM/DFM in some circumstances, it was not. So GM added a vacuum pump to create additional vacuum.

 

[Marky Dissod]

Normally, the engine intake creates enough vacuum to assist the brakes,
but with AFM/DFM in some circumstances, it was not.
So GM added a vacuum pump to create additional vacuum.

Ok, so there's a cheap solution to disabling Engine 1/2@$$ / Cylinder Confusion.

Wonder if there's a better / other use for that vacuum pump ... ?

 

[intergalactron]

There's the culprit. Missing some metal, and the main body measures .839" dia, measures .844" dia at the roller. Just enough to not come out of the bore.

 

[intergalactron]

I was cleaning in the garage last nite and started digging thru the bits and pieces from my rebuild last summer. Here's the oil pump... Nothing too crazy for damage. Little bit of scoring.

 

[intergalactron]

Next up: Main bearings. Not sure why the thrust bearing broke. For the most part these look really good. Only a couple of scratches. There's a few small pits/nicks, but I think that's just from them clanging around in a box.

 

[intergalactron]

Piston Rings. Look pretty dirty in this pic, but they were free on the pistons. Probably picked up some of the dirt from the box they were in.

 

[intergalactron]

Rod Bearings. Some visual wear, but I couldn't really feel any of it.

 

[intergalactron]

Cam. #8 had the failed lifter, but I can't find any damage from that. Cam is oriented with #1 at the top, #8 at the bottom. First picture is 1/2, second is 3/4, third is 5/6, last is 7/8.

Had some significant scoring on the second bearing journal (bottom of first pic), and some sporadic light scoring on the lobes, but not bad.

 

[intergalactron]

Lifters. Aside from the failed AFM lifter pictured previously, there's only a little bit of scoring on the rollers. All rollers ran smooth.

 

[intergalactron]

And finally the push rods. Tips look great. Some have some buildup on the rod. Unfortunately I don't know which ones came from where.