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Originally Posted by jeepers creepers
While tearing down oil pump today i've took off some cap to see main bearings conditions and this is what i've found:
[IMG=http://img141.imageshack.us/img141/4468/img0476d.jpg][/IMG]
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engine had run for about 2 h, just for the set up, non road, i've cleaned doing my best all tunnels, holes everithing in the engine blowing with compressed air, and solvent, engine was perfect at the assembly, coated all bearings with specific lube, checked all the clearances , they were fine...
As you can see crank looks like perfect, but wear pattern on the bearings are telling something wrong, misalignement?
i'm so frustrated. |
Looks like a lot of very fine material circulated with the oil, I'd guess stone remains left on and in the cylinder walls from the honing operations.
Keep in mind that bearing shells don't fit perfectly round, there are high and low spots a few millionths of an inch in difference. You will see the high spots as shinny areas on the bearing. It doesn't take much more than a piece of lint under the shell to cause this.
Bogie