Daniel P

Chevrolet 1930, noisy cam?

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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?

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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.  

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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.

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Did you adjust the rockers hot? My '36 said to adjust them while running. I still have the hammered 6 thou gauges.

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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.

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Yes I had the same thing on my 32 chevy   bent push rods .  car is quiet  and runs better  . kings32chevy

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