62_Conv_2-4s
Well Known Member
I have a 327/300 engine in my 1962 impala. The engine runs great and passes a cylinder pressure check and leak down test just fine. The problen is there is a slight knock noise below 700 rpm. You can only here the noise at idle speed. When the engine is reved the knock noise dissapears, It is not valve related as it is a deeper sounding knock. I would like to repair the motor with out doing a total rebuild. I am going to pull the pan and check the main and rod bearings first. Any advise is appreateated as I do not wish to spend a great deal of time or money on an otherwise great running engine.