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Old 04-12-2018, 03:48 PM   #95
40 Deluxe
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Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,778
Default Re: Chasing the knock.

Quote:
Originally Posted by Garagekulture13 View Post
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.
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