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Always difficult to diagnose from a video.
But i would say at start up it sounds like a timing chain hitting against the engine housing. And the later noise also remind me of a chain with too much slack hitting something. Did you test the timing of the engine?
The other thing, i could imagine, is that this is caused by ignition that is has a faulty insulation. But this noise would be much more rhythmic.
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Last edited by Smallblock454; 07-11-2024 at 12:14 AM.
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