Re: Strange 327 Knock

Posted by PackardV8 On 2011/7/11 22:53:27

At this point it is extremely important to check the bearing shell in the ROD.

The spin marks in the cap could be from a PREVIOUS spun rod bearing that was 'fixxed'. i.e. it is possible that a previous 'rebuidler' may have bought only 4 sets of rod bearings and replaced the UPPERS (in the upper rod) only. Thus DEPENDING on the lock for the UPPER shell to keep BOTH the lower and upper from spinning. This was a short cut shyster engine building trick used "back in the day" when money was tite. They could get away with it because it's the UPPER rod shell that takes the greatest beating and very few cars were ever driven much over 10K mles per year.