Rod Knock Question

[Monte M.]

Thanks for the feedback. After talking to him again, he said it seem to come and go. This leads me to believe it is something else. We are just going to tear it down. It turned out to be a Tonawanda block and he has already had a Flint block built for the car, but I thought it was worth a shot.

[Edward J.]

Re: Rod Knock Question

Monte, it may not be the correct way to fix by replacing just the bearing, If you have a engine with a steel crank, polishing the journal may buy you some time,If your crankshaft is cast iron, they are much softer, if there are any ridges the new bearing will not last long , Once the babit on the bearing is gone the copper tends to chew up the crank journals on cast cranks.

[Roy B.]

Re: Rod Knock Question

It could be the bearing but you said it looked OK, it could be a piston collapse, it could be carbon build up on top of the piston, it could be a piston pin,it could be a rocker or lifter, it could be something that got stuck on the piston top hitting the head , dang it could be anything , pull the heads.