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Mach 1
Engine knocking loud when cold??
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<blockquote data-quote="LS2GTO" data-source="post: 11198245" data-attributes="member: 73731"><p>Sounds like piston slap, it's about the only 'knocking' noise that completely goes away when warmed up. </p><p></p><p>Rod knock or a spun rod bering(s) will be there all the time no matter what the engine temperature. If you were knocking real bad from detonation it would always be there and would not be affected by engine temperature. Though to be knocking that bad from purely detonation is kinda rare unless you have very bad gas. But then again, that would all go away with some good gas.</p><p></p><p>My vote is for piston slap, try some heavier oil especially cold, meaning 10w or something that like.</p></blockquote><p></p>
[QUOTE="LS2GTO, post: 11198245, member: 73731"] Sounds like piston slap, it's about the only 'knocking' noise that completely goes away when warmed up. Rod knock or a spun rod bering(s) will be there all the time no matter what the engine temperature. If you were knocking real bad from detonation it would always be there and would not be affected by engine temperature. Though to be knocking that bad from purely detonation is kinda rare unless you have very bad gas. But then again, that would all go away with some good gas. My vote is for piston slap, try some heavier oil especially cold, meaning 10w or something that like. [/QUOTE]
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Engine knocking loud when cold??
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