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Old 04-13-2026, 09:55 AM   #9
hueyhoolihan
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Join Date: Dec 2024
Location: central coast california
Posts: 603
Default Re: My flathead started knocking.

Quote:
Originally Posted by solidaxle View Post
This is probably not the solution but before you get into expensive repair, check the timing. I was adjusting mine by trail and error to get the most performance without a timing light and it at one point it was so far off it knocked.
good point...

a slight knocking can occur due to a lack of octane too. usually exacerbated with in increased load on the engine. another quick and simple test. although most likely to occur in a performance, high compression engine though.
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