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Discussion Starter #7
Was block line honed or line bored?Possibly thrust clearance never checked -set upon assembly.Bill C.

The engine was sold as a built crate short block assembled by LSX "specialists". 20 miles and 7 passes later the oil pressure was dropping so I pulled it to check the pump and O-ring. I found copper flaking in the pan and now this is what I'm looking at.
 

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Never seen a transmission issue wipe out the front side of the thrust bearing. Looks to me like you have an engine related issue, not a transmission issue.
 

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Repaired crank or a second/blem crank with bad finish on thrust surfaces, or they never even checked the thrust clearance and there was none.
FYI, I find very few thrust flanges on thrust bearings that I don't have to "straighten". If you measure the thickness of the flange with a c-mic it will be very eye-opening.
 

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What's the application? Power, RPM, etc?
 

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Discussion Starter #13
What's the application? Power, RPM, etc?

Intended Use: Street Strip. Current best use: Door stop. Power between 650 and 700 N/A all done. 7500 RPM's when fully broke in. 11.75 to 1, LS3 CNC heads In a 3250 lb car.
 

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It does not make a difference what the application is.
As said above it was not measured, machined and assembled properly.It is now trashed.
Run a LSx at 9000RPM for a season without a center counterweighted crank and you'll see some abnormal wear on the thrust; both sides.

The pictures aren't the greatest, but the damage doesn't look consistent on both shells. One shell looks worse than the other. That's why I asked.
 

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Discussion Starter #16
Part of the sellers response:

This being said you can see that the thrust was knocked out of the motor. You also know that this is most commonly from having the motor mis alligned with the th350 you have in the car.


I'm guessing the excuses will continue. No way to misalign the turbo350 with the dowels in place. I have had the same transmission for the last three years. Same converter for the last two years. Zero problems. Shipping it back will just result in more lame/bs excuses and probably worse. I don't really know what to do with this at this point. As noted by another poster the crank needs magnafluxed straightened probably remagnafluxed then turned or just replaced with a quality straight piece that should have been in there to start with.
 

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Discussion Starter #17
Run a LSx at 9000RPM for a season without a center counterweighted crank and you'll see some abnormal wear on the thrust; both sides.

The pictures aren't the greatest, but the damage doesn't look consistent on both shells. One shell looks worse than the other. That's why I asked.


20 miles.... seven 1/4 mile passes. Nowhere near 9000 rpm's.
 
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