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Old 27-12-2019, 09:24 AM   #2
russellw
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Default Re: Engine knock or is it the infamous au rattle?

Engine knock (or to be accurate, pre-ignition detonation) generally occurs under load such as when climbing a hill from low revs and is caused by incorrect ignition timing and/or poor quality fuel.

What you are hearing sounds more like a main bearing knock which will eventually be terminal.
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