Knocking in LS1
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Knocking in LS1
I have a quite a distinct knock when the motor is cold in my 99 z28. Some have told me its normal.. and others say get it checked.
What mit this be.. just a general guess.
What mit this be.. just a general guess.
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what the problem is is the pistons gm used in the ls1 are a short skirt piston for low friction but some of the pistons were undersized a tiny bit, and until they warm up they rock in the cylinder making that terrible noise.