last year I finished a ls1 in my 1996 mustang. Ran a best of 12.02 with a wrong tire size..

for a few months this year it served as a DD for my younger brother going to and from school which is <2miles away.

Somehow, somewhere he hit a bump and managed to slightly crack the oil pan.
By the time he got home, he had lost enough oil to score the main bearings.
After taking it apart, I found this as well:




i'm glad it hadnt caused anything. The broken pieces were still in position.

But my main question is this:

while using the plastigauge and checking clearances, I managed to cause this:



my nail doesnt catch on it though. it just seems that the coating got rubbed off when tightening the bolts i suppose?

will i be ok or should i consider replacing them? They are the P-series clevites

 

Thats interesting...it looks like the main bores weren't very round.

 

Forgot to mention, machine shop turned the crank .010/.010

Might it have been that I somehow tightened that side more than the other?
The engine is supposed to have 66k mi.
Could the loss of oil pressure caused the bores to distort?

 

Stock main bolts?

 

yes, stock bolts