J-Rod

Someone I know tore their motor down to have a look at it. It is a Darton sleeved motor.

Both sides of the thrust were heat discolored.

Has anyone seen this before in an LS1 buildup either with a Darton sleeve application, or in a regular application?

I'm not looking at the Darton as being the culprit, but more looking to see if it may have been an assembly error. I'm not there, so I can't check endplay, etc... But I'm just looking to see if anyone else has seen any sorts of issues.

Thanks.

mikey

iTrader: (6)

I've seen the thrust torn up in an LT1 but never an LS1. Suspect was a balance issue. Also, if it is an automatic car, improper torque converter clearance can cause it. The obvious is improper end play.

LOnSLO

iTrader: (15)

If both sides are discolored, then I agree with Mikey on too little endplay. I've seen a couple thrust bearings burned up on the back side from a strong clutch.