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Who else has this sound?

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Old 04-18-2005, 05:32 AM
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Default Who else has this sound?

Is it normal to have a slight knock at start up and high RPMs ? Mostly makes the sound from cold start and goes away.
Old 04-18-2005, 05:55 AM
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RPM's kinda not,but ls1's are known for cold start knock.
Old 04-18-2005, 07:08 AM
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Depends, I had something similar to that, I actually have a video clip you can watch and listen to. Anyway I threw 2 rods later on, it lasted awhile but they let go after doing 7400rmp dyno runs and then going to the track the next day, 2nd pass it happened.

-Sly
Old 04-18-2005, 12:29 PM
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Sounds like piston slap. Mine doesn't have it, but I've heard of a lot of earlier LS1's having this problem. They "improved" the stock piston design on later models to help with this.
Old 04-19-2005, 05:04 AM
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Originally Posted by Glyselle
Sounds like piston slap. Mine doesn't have it, but I've heard of a lot of earlier LS1's having this problem. They "improved" the stock piston design on later models to help with this.

So if it is piston slap am I doomed for a shorter engine life?
Old 04-19-2005, 05:39 AM
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Originally Posted by RedZoutlaw
So if it is piston slap am I doomed for a shorter engine life?
not nessesarly.My 02 ss slapped from 8k till 40k when I sold it.I sprayed the **** out of it to.




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