Thrust bearing trashed...what are my options?
Thrust bearing trashed...what are my options? Title says it all. I bought a 2001 LS1 with 80K miles, tore it down and the thrust bearing is trashed. So the crank is garbage. What are my options here? Can I just pick up a crank, have the machine shop look over everything and throw it all back together with new bearings etc...? Or are there other issues that must be considered? I really don't even know what the culprit was that caused this in the first place as I bought the engine and trans as a pullout.
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Have you measured endplay? Just curious as I had one open up to .040 and the crank was rubbing the block. Stock should be .004 to .008. Yes you could buy a crank only, drop off everything you have to a machine shop and let them assemble it with new bearings. Some places can weld the thrust surface on the crank and regrind it back to spec, but the ones I talked to said they weren't confident on the weld holding. Here's my faulure:
https://ls1tech.com/forums/racers-lo...ew-engine.html
The biggest problem is to ensure it doesn't happen again. Is this an M6 or A4?
https://ls1tech.com/forums/racers-lo...ew-engine.html
The biggest problem is to ensure it doesn't happen again. Is this an M6 or A4?
I didn't measure, but there was a ton of slack in it. Enough that I could move the crank back and forth a fair bit so it would make a 'clunking' noise where it was hitting.
Its an A4, and that's what I'm worried about the most. I don't want to put this thing all back together only to have it happen again. What would cause this? I'm assuming something trans or converter related, pushing on the crank? I guess it would be wise to have the trans checked out too.
Its an A4, and that's what I'm worried about the most. I don't want to put this thing all back together only to have it happen again. What would cause this? I'm assuming something trans or converter related, pushing on the crank? I guess it would be wise to have the trans checked out too.
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Converter ballooning could push forward on the crank. Could have too high of line pressures. Thrust damage seems to be a grey subject. Its hard to say exactly what causes the damage. But yes, I heard that a trans, converter, engine accs, and even engine electrical could cause thrust damage. Do some searching around and you will see what I mean.
