Re: "Acceptable" bearing clearance

Posted by PackardV8 On 2015/4/27 10:13:00

When u plastigauged the bearings did plastigause only once or also a second time with the crank turned 90* from the first position f plastigauge test???

My point is (regardless of the polishing) is to determine how out of round the crank main journals are.

Certainly grinding the crank and new undersize inserts is the optimal way to go for very long term ownership and max engine service life.

On the other hand, if it was a dealer warraanty claim "back in the day" then the mechanic would drop a set of .002 under bearings in the engine and the owner would no doubt still get 40K miles out it which is about all any of the prewar and immediate post war engines were good for from the factory when brand new anyway.

THis is one of those 'judgement calls' that can vary from individual situation to situation.