Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - bearing wear
Thread: bearing wear
View Single Post
  #2 (permalink)  
Old 02-24-2011, 12:15 PM
oldbogie oldbogie is offline
Registered User
 
Last photo:
Join Date: Apr 2007
Location: Seattle, Wa
Posts: 6,686
Wiki Edits: 0

Thanks: 3
Thanked 403 Times in 348 Posts
Quote:
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]

Uploaded with ImageShack.us



Uploaded with ImageShack.us



Uploaded with ImageShack.us



Uploaded with ImageShack.us


Uploaded with ImageShack.us

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
Reply With Quote