Re: Strange 327 Knock

Posted by Ross On 2011/7/11 22:34:18

Shimming bearings was standard procedure to get a little more life out of a tired engine when you didn't want to grind the crank to undersize. I have often done it on my own cars.

That rod bearing has been spinning and has probably mucked up the rod and cap. You could try putting another bearing in and hope for the best but...that begs the question of why it spun in the first place; a plugged passage or low oil pressure because of a loose main bearing.

On my monitor, I think that bearing is saying .030, which means 30 thousandths undersize. In which case, that crankpin will measure 2.220". or if that was a main it would be 2.716 if memory serves.

See if you can get a caliper up in there--even a cheap one from horrible freight will do.