Quote:
Originally Posted by Garagekulture13
I did not check clearances. However today I noticed while running around 40 mph I could bring the timing lever up about a quarter of the way and the motor would quite down. What's the reason fo this?
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Probably worn bearings/pistons. Retarding the timing lowers combustion pressure thus making rattles quiet down. This was an old used car dealer trick to sell a clunker. The engine would sound good until the new owner had it tuned up. Setting the timing to proper specs would bring on the knocking.