Hello,

I gave my short block stuff to a local shop for cleaning and inspection before spending a much larger sum of money for shipping and machining at another shop several states away. I had them mic the mains and rods with new bearings and got numbers that seem on the loose side to me. The mains came out at .003 on 1,2,4, and 5, with the middle (thrust) bearing at .0035. The rods came out at .0024 and .0025. Those are on the loose side but good according to the service manual, but I've read here that you want to run on the tight side because of the infamous #2 rod bearing issue. One of the guys at Lindsey's I spoke to said with those clearances I'm going to have to run 15-50, but it was a judgement call as to whether or not to look for another crank. This is in an engine that will be used on the street only, so running loose doesn't get me anything as far as high-rpm lubrication goes. Should I look for a different crankshaft, or not worry about it?

Thank you for your opinions,

Rick

 

if the numbers are in spec and its a street motor i would run it.
make sure to use 15w50 or 20w50 oil in whatever color bottle you prefer and watch the oil level.