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Rebuilding a GM8 turbo,show and tell

I realize this is an old post. I'm looking at doing a refresh on my gm4 turbo from a 1995 k2500. I've had a good look at Bison's old post on how to rebuild a gm8 turbo which should be the same has a gm4 turbo. My question is can I leave the snail house on the manifold and simply remove the housing from the snail house?
thanks
 
I just opened my turbo. In order to get divide the end part that goes down to the downpipe, I had to had a friend of mine weld on new nuts on the bolts to be able to open it up.

The air side snail house was much easier to open, but disconnecting it from the air intake was the easiest part of removing the turbo in my opinion If I were you, I would get the entire thing in on my work bench! :)
 
I'm just doing one of these on a GM 8 and it looks like I can't get the seal on the exhaust end to collapse enough for the shaft to go in all the way. The seal won't go down in the groove on the housing. I tried to use a small zip tie as like a piston ring holder to get it to slide down in the housing but no luck. Any suggestions?
 
Well I took the seal off the shaft and pinched it closed a little and reinstalled it and it seated down in the groove properly, now my issue is when I assemble the intake side and tighten the nut on the impeller the turbo won't spin, like there is a clearance problem somewhere. I've reasembled with old parts and new parts, measured parts with a caliper and I can't figure out what is causeing it to bind up.
 
Wish I had an answer for ya. I have redone a few turbos but either had it go perfectly or so wrong I damaged parts then took it to a real turbo buy to make perfect.

Soaking the seal in a high sulfur oil like synthetic gear oil so it penetrates the pores?
Mild heat for expansion is tempting but I had it work perfect once then ruined parts the next time I tried it so I can’t say I recommend it.

When the turbo guys looked at the ones went wrong and I ask what I dod wrong or was made wrong it was shrug shoulders and they say something like: just bring it to us and use our parts next time for no problem. Of course they made it through even the 08 crash- covid hurt them but biden killed em. So now no more turbo shop here I can trust that I know of yet.
 
I have done several turbo rebuilds from several manufacturers, never had a problem.
Is there carbon in the sealing ring groove ? ? ? ?
Then a small screwing driver and pressed the seal deeper into the groove in several places around the seal and it should pop right in.
 
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