Guest Daniel P Posted April 14, 2016 Share Posted April 14, 2016 Hi, This last weekend I fired up and testdrove my Chevrolet 1930 for the first time. It was a "boxed" car wich I bought a few years back and put back together. The problem is that the Engine is quite noisy. After some troubleshooting Ive located the sound to the cam side of the Engine and along the entire block - from back to front - just were the cam is located. But when I worked on the Engine last year I didnt notice any bad wear on either the cam or the lifters. I was expecting some tick but not this sound wich is quite loud. A friend om mine joked and said it sounds almost like an old diesel. The only thing i noticed when I worked on the Engine last year was that two or three lifters were cracked high up on the sleeve. So I changed those. I have adjusted the rockers on it but the sound is still there. Oil pressure is good and the Engine is running good otherwise. Just this knocking sound. Anyone with experince on these older Engines in Chevys and what this sound can be? Link to comment Share on other sites More sharing options...
Alfre Posted April 14, 2016 Share Posted April 14, 2016 The wrist pins quite often make this racket and it is very common in 29-31 and does't due damage, and getting used to it is no fun. Link to comment Share on other sites More sharing options...
motoringicons Posted April 14, 2016 Share Posted April 14, 2016 Could there be an issue with end play that is causing the camshaft to go back and forth when the engine is running (especially on acceleration or de-celeration). It doesn't take much travel to cause this. Most camshafts have some sort of thrust surface that keeps them moving back and forth and sometimes this thrust surface can wear. I am not that familiar with early Chevys, but this can often be fixed with a simple shim. 1 Link to comment Share on other sites More sharing options...
Spinneyhill Posted April 15, 2016 Share Posted April 15, 2016 Did you adjust the rockers hot? My '36 said to adjust them while running. I still have the hammered 6 thou gauges. Link to comment Share on other sites More sharing options...
rsb Posted April 19, 2016 Share Posted April 19, 2016 Your mentioned cracked lifters. I bet your push rods are bent and tapping the side covers on the inside. Pull them out and roll on a flat surface to make sure they are straight. Link to comment Share on other sites More sharing options...
kings32 Posted April 19, 2016 Share Posted April 19, 2016 Yes I had the same thing on my 32 chevy bent push rods . car is quiet and runs better . kings32chevy Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted April 19, 2016 Share Posted April 19, 2016 OP seems to have lost his way Ben Link to comment Share on other sites More sharing options...
Spinneyhill Posted April 20, 2016 Share Posted April 20, 2016 Are you sure it is valves and not the cast iron pistons rattling? Link to comment Share on other sites More sharing options...
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