Re: Strange 327 Knock

Posted by Mike On 2011/7/5 22:14:28

Ross...thank you for the offer. When it comes to machining and things of a finer nature, the less i do the better. I was thinking since the oil pressure was great, i may just do rods, starting with that one to see how bad it is. Depending on how confident i am, i may do mains also.

I wasn't feeling rod because it wasn't happening as much, and before i couldn't isolate it pulling plug wires. As much as a rod bearing sucks, especially if just a new bearing won't fix it, it's great to have finally found the issue.

When you say jack the crank up to use plastigauge, is that because it drops some when you remove just one cap or because you can't get into the mains above the cross member?

I may do the rods (again, more than number 2 if i'm feeling confident.) and be done with it for a year or so to hit the show in warren, and save doing everything for a motor out refresher total rebuild in a couple winters.

I'll let you know if i need one bearing, first order is tearing it down to see if it's factory sized or if the crank has been ground under.