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Knock by front exhaust cam during warm up

posted by  maplebones on  Sun Oct 15 11:06 CST 2023
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last visit: Thu Oct 23 22:53 CST 2014
[RELATED]

Hi,

If you haven't solved this yet, I suggest you give a look at your exhaust manifold gaskets.

I wouldn't have believed it until it happened to me, but a failed or failing gasket can make a knock that mimics a rod knock.

They don't usually doesn't come and go but strange things sometimes happen.

It could possibly be explained by the fact that the manifold gets hot and expands before the block does. And then maybe when the block eventually expands it seals it back enough not to be noticeable.

Good luck,
Peter






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New Knock by front exhaust cam during warm up
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