Too Tight Rebuild

Did you mix up the main bearing caps?

They should have numbers cast in them from 1 - 4 and then the rear. Make sure that they are in the proper order and position (not backwards).

Install them backwards?

You need to put the sides with the anchor slots together.

When they are all together correctly the numbers are sequential from front to rear on the same side of the engine.


Then check your bearing clearances with plasticguage.