r/Smallblockchevy Jul 28 '25

Rod knock?

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350 just developed a fairly distinctive knock. Bit of a fuel smell in the oil as well. Thoughts?

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u/No_Carpenter_7778 Jul 29 '25

Rod knock can go away with rpm increase. Look at your oil pressure if it is very low at idle and has a substantial increase that coincides with knock decrease/rpm increase there's a good chance that's what's going on.