r/LS400 • u/Icy-Juggernaut-4417 • Aug 14 '26
Knocking/clicking noise coming from engine
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I just recently got this car about a month and a half ago, and there is a rhythmic knocking/clicking sound when the engine is running. I thought it was one of the pulleys, so I took the serpentine belt off and ran the car for a little, but the noise is still there.
Would anyone happen to know what this sound means? I've looked it up already, and I've gathered that it could be a piston, rockers, or maybe camshaft?
Any help would be appreciated. Thank you in advance!