Engine noise

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09-13-2006, 06:56 PM

joel_018

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Join Date: Dec 2004

Posts: 16

Engine noise

I have a 98 z28 with about 85k and when I start the car up I hear a knocking noise in the engine. I was wondering what it could be.

09-13-2006, 07:20 PM

Bayer-Z28

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Join Date: Jan 2005

Location: N Falmouth MA

Posts: 2,597

Re: Engine noise

Piston slap or hydraulic lifters not pressureised yet.. no biggie.

Piston slap is normal w/ our cars.

09-13-2006, 07:30 PM

joel_018

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Join Date: Dec 2004

Posts: 16

Re: Engine noise

So is there anything that needs to be done.

09-13-2006, 07:40 PM

S. Holley

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Join Date: May 1999

Location: longwood, Fl, USA

Posts: 694

Re: Engine noise

Yup... drive it

09-13-2006, 08:26 PM

Bayer-Z28

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Join Date: Jan 2005

Location: N Falmouth MA

Posts: 2,597

Re: Engine noise

No, don't worry about it. When I change my oil I do 2 qts of 20/50, and the rest 10/30 or 5/30... It quiets it down a bit.

Nothing to worry about. If it gets really loud, you might have a problem. It goes away once warmed up, right?

09-13-2006, 08:32 PM

skifast87

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Join Date: Jun 2006

Location: Howard Co MD

Posts: 92

Re: Engine noise

how loud is this noise. Is it like to the point where you can just here it over every thing else. or very noticable what i mean by that is does it really stand out from all the other noises.

09-13-2006, 09:03 PM

GhostZ28

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Join Date: Sep 2005

Location: Tulsa, OK

Posts: 1,326

Re: Engine noise

Quote:

Originally Posted by skifast87

how loud is this noise. Is it like to the point where you can just here it over every thing else. or very noticable what i mean by that is does it really stand out from all the other noises.

some LS1s make more noise.. just that way. mine is like yours, its noticeable above the other noises till it warms up