I killed an LT4
Thread Starter
Instructor
Joined: Oct 2000
Posts: 221
Likes: 0
From: Austin, TX
I killed an LT4
While driving on Saturday night, just after two shifts a little below rev limit, the SES light start flashing. A couple seconds later there was a clanging noise, like a hammer on anvil. On Monday I took it to Austin Corvette. They said chunks of metal fell out when they removed the oil pan. The #6 bearing distintegrated. I have the stock rev limit, which I did not even hit. It was full of oil and the oil pressure gauge read normal. Only mods were headers, exhaust and K&N. I am the second owner. It had 39,000 miles.
On the bright side, I might never have chosen to build a stroker motor, but now it's the rational thing to do. I am going to a solid roller 396, built by Speed Demon Motorsports.
[Modified by Charles Klein, 9:22 PM 1/10/2002]
On the bright side, I might never have chosen to build a stroker motor, but now it's the rational thing to do. I am going to a solid roller 396, built by Speed Demon Motorsports.
[Modified by Charles Klein, 9:22 PM 1/10/2002]
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Thread Starter
Instructor
Joined: Oct 2000
Posts: 221
Likes: 0
From: Austin, TX
Re: I killed an LT4 (Hammer)
Hammer,
There is no evidence of a nitrous setup that I have seen, but of course it would natural to remove any such evidence before he sold it to the car dealer.
Incidentally, does your car have the original bottom end?
[Modified by Charles Klein, 10:32 PM 1/10/2002]
There is no evidence of a nitrous setup that I have seen, but of course it would natural to remove any such evidence before he sold it to the car dealer.
Incidentally, does your car have the original bottom end?
[Modified by Charles Klein, 10:32 PM 1/10/2002]
Melting Slicks
Joined: Oct 2000
Posts: 2,158
Likes: 9
From: N.E. WA
Re: I killed an LT4 (bogus)
It had to be NITROUS! There is no other logical reason that the BEARING went out with such low miles. Give me a break.. Maybe it was supercharged? Maybe the last owner didn't change the oil filter or oil. Why oh why is nitrous the assumed culprit?
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Re: I killed an LT4 (ANTI VENOM)
It had to be NITROUS! There is no other logical reason that the BEARING went out with such low miles. Give me a break.. Maybe it was supercharged? Maybe the last owner didn't change the oil filter or oil. Why oh why is nitrous the assumed culprit?
Le Mans Master
Joined: Jan 1999
Posts: 5,135
Likes: 23
From: Long Island NY
Re: I killed an LT4 (ANTI VENOM)
It had to be NITROUS! There is no other logical reason that the BEARING went out with such low miles. Give me a break.. Maybe it was supercharged? Maybe the last owner didn't change the oil filter or oil. Why oh why is nitrous the assumed culprit?
I'm not attacking nitrous (look in my sig) but it certainly would add some sense to this.
Charles, I am still on the stock bottom end. I am thinking very hard about a 396 when/if it goes.
Team Owner
Joined: Aug 2000
Posts: 32,844
Likes: 0
From: Looking California Feeling Minnesota
St. Jude Donor '03-'04-'05-'06-'07'-08
Re: I killed an LT4 (Hammer)
1K SPORT spun a bearing in his Grand Sport this year.It had like 38K and never any N20!! Maybe it's a LT4 thing?!?! :confused:
Team Owner
Joined: Aug 2000
Posts: 32,844
Likes: 0
From: Looking California Feeling Minnesota
St. Jude Donor '03-'04-'05-'06-'07'-08
Re: I killed an LT4 (Charles Klein)
Yup, sounds just the same!! here's Randy's email, maybe he can help ya out!! grandsport267@msn.com
He was driving along then outta no where it was like someone beat the hell outta the motor w/ a ball bat. Warranty bought him a whole new engine!! :yesnod: And he bought the old one back for like core of $400 or something. Hope this helps, sorry about your car!!
He was driving along then outta no where it was like someone beat the hell outta the motor w/ a ball bat. Warranty bought him a whole new engine!! :yesnod: And he bought the old one back for like core of $400 or something. Hope this helps, sorry about your car!!
Safety Car
Joined: Nov 1999
Posts: 3,891
Likes: 2
From: Houston, TX
Re: I killed an LT4 (Charles Klein)
The engine will be out tomorrow. I will look over it with my machinist and see if we can find exactly what the problem was. Really no reason for it. I wonder if your car was built on a Friday???
Anyway, just wait until you get it back. I will guarantee a smile from ear to ear! :yesnod: :yesnod: :yesnod: :yesnod:
Anyway, just wait until you get it back. I will guarantee a smile from ear to ear! :yesnod: :yesnod: :yesnod: :yesnod:
Burning Brakes
Joined: Aug 2001
Posts: 969
Likes: 0
From: San Diego CA
Cruise-In III Veteran
Re: I killed an LT4 (Thumper)
DEAR GOD!!! I have the same symptoms as you that just started happening a few days ago. There is a pinging noise coming from the engine and is consistent with the RPM's. The check engine light came on for a few days, but is now off. I took the valve cover off last night and it is coming from the #6 rocker arm, or some part from that cylinder. I know that GM had a recall on early LT4 rocker arms back in 1996. Hopefully that's all it is.