LS1 Knocking when cold...normal?
Thread Starter
Teching In
Joined: Dec 2003
Posts: 34
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LS1 Knocking when cold...normal? Im looking into getting a 98+ Trans am, and i test drove a nice WS6 the other day, it was a 2001 with 30,000 miles. The motor was knocking when it started up untill it warmed up, the guy said they all do it. Is this true? or is it suttn i should be concerned with? Thanks a lot.
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Mine make alot of noise too. A liitle valvetrain noise is normal. Does yours drink oil between intervals?
My Silverado does it bad and drinks the oil. I can't figure out how to go about taking mine to the dealers because they would just say its normal. I don't think they would just say OK to giving me a new engine as GM has all their TSBs about it to try and cover their butts.
My Silverado does it bad and drinks the oil. I can't figure out how to go about taking mine to the dealers because they would just say its normal. I don't think they would just say OK to giving me a new engine as GM has all their TSBs about it to try and cover their butts.
Originally Posted by BLASTER
Mine make alot of noise too. A liitle valvetrain noise is normal. Does yours drink oil between intervals?
My Silverado does it bad and drinks the oil. I can't figure out how to go about taking mine to the dealers because they would just say its normal. I don't think they would just say OK to giving me a new engine as GM has all their TSBs about it to try and cover their butts.
My Silverado does it bad and drinks the oil. I can't figure out how to go about taking mine to the dealers because they would just say its normal. I don't think they would just say OK to giving me a new engine as GM has all their TSBs about it to try and cover their butts.
TECH Fanatic
Joined: Jun 2002
Posts: 1,227
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From: Indianapolis
My 98 never knocks and has never used ANY oil.Never even have to check it. 5k inbetween changes with Mobil one. It also pulls 40lbs of pressure at idle when hot.98's are supposed to have weak oil pumps but i dont see that. I have 42k on the car.
Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
My 00 Formula w/36,000 does it when the car is dead cold and the outside temp is around 40 or below. Good ol' piston slap - sorta sounds like a diesel for the first couple of minutes or so.
Launching!
Joined: Dec 2003
Posts: 260
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From: Palm Bay, Florida
My 01 Z did it with 40,000 miles on the dial and it was using about a quart even 4K miles. I took it to GM one day because there was oil coming out of my throttle body. Turns out the rings were going bad and they replaced the rings and bearings. Now with 55,000 miles, it still knocks but the oil consumption is better.
Joined: Nov 2003
Posts: 6,216
Likes: 236
From: Wichita KS / Rancho San Diego
If you read enough on this, there are guys who have had their motors' internals redone by GM under warranty. But I don't think that even that is a permanent fix. It's a part of living with the LS1 for most of us.