Thrust Bearing Wear

TorchRed_4.0 · Sep 6, 2022

I tore my engine apart after finding gold fine metal in my oil. Engine has about 200 miles max. Does this look normal?

HotFox · Sep 6, 2022

Nope not normal. You can see alot of debris ran through this bearing. Those dots near the bearing tang are evidence of debris embedded in the bearing either it was put together dirty or you have other issues. The thrust looks almost new or factory machining marks? Or is that wear too? Can't tell.
Scott

TorchRed_4.0 · Sep 7, 2022

HotFox said:
Nope not normal. You can see alot of debris ran through this bearing. Those dots near the bearing tang are evidence of debris embedded in the bearing either it was put together dirty or you have other issues. The thrust looks almost new or factory machining marks? Or is that wear too? Can't tell.
Scott

Well this bearing has less than 200 miles on it, I just put this motor together like 6 months ago and the oil looked like that.

rednotch · Sep 7, 2022

Check the end play if you haven't all ready. Its definitely open end up some clearances on the thrust. you will see some wear from break in but that looks excessive like a drive train issue to me, . Reinstall and check the end play numbers.

HotFox · Sep 7, 2022

After a second look it looks as your thrust is misaligned. Only one half is showing wear. Some times the cap will need to be seated to allow proper alignment for both bearings as red notch stated a dial indicator showing end play may point you in a direction.

Here is a example of decent bearings this is from my 331 that I put together back in 2009 that I tore down for the first time this spring, it regularly saw 8K rpm. Remember your crank and bearings never touch it rides on a thin oil film.

Scott

manicmechanic007 · Sep 10, 2022

How heavy is your clutch?

revhead347 · Oct 14, 2022

manicmechanic007 said:
How heavy is your clutch?

I tore up a thrust bearing from heavy clutches. It took 85,000 miles.

Kurt

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