LT4 failure modes
Thread Starter
Safety Car
Joined: May 2002
Posts: 4,010
Likes: 26
From: Somewhere nowhere
LT4 failure modes
I've noticed quite a few LT4's have failed in one way or another.
mostly spun bearing.... head gasket.
I'd like to take a survey of what happened, under what condition, and what the owner or mechanic thought caused it.
I think it would be interesting.
mostly spun bearing.... head gasket.
I'd like to take a survey of what happened, under what condition, and what the owner or mechanic thought caused it.
I think it would be interesting.
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
Re: LT4 failure modes (larryfs)
Only thing I've noticed for my LT4 failiers are : waterpump (2xs), Power steering pump and line (2xs), Rear (2xs). Other than that it's been great. :cheers:
Le Mans Master
Joined: Aug 2002
Posts: 6,080
Likes: 3
From: Clearwater FL
St. Jude Donor '06
Re: LT4 failure modes (1996man)
extremely limited tire life. lack of fuel economy at 63000 rpms.
Mine just had a waterpump bite it, but otherwise it has been fine over 1 yr and ~ 9k mi. Rear tires have a couple mos left on them, but the fronts are fine... hmmm
Drifting
Joined: Jul 2001
Posts: 1,296
Likes: 0
From: Largo Florida
Re: LT4 failure modes (larryfs)
I've noticed quite a few LT4's have failed in one way or another.
mostly spun bearing.... head gasket.
I'd like to take a survey of what happened, under what condition, and what the owner or mechanic thought caused it.
I think it would be interesting.
mostly spun bearing.... head gasket.
I'd like to take a survey of what happened, under what condition, and what the owner or mechanic thought caused it.
I think it would be interesting.
Le Mans Master
Joined: Jun 2002
Posts: 6,097
Likes: 2
From: Cincinnati Oh
Re: LT4 failure modes (LT-4 CE)
To keep from jinxing myself, I refuse to comment on mine! :lol:
I read a few (maybe 2?) problems on the internet but who knows what they did/were doing to cause the problem/failure. Mine sees constant spirited driving (its not my daily, so there is only one real use for it) and I've gone through a waterpump and rear tires, everything else is great.
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Thread Starter
Safety Car
Joined: May 2002
Posts: 4,010
Likes: 26
From: Somewhere nowhere
Re: LT4 failure modes
if you get into autox or road racing, there are plenty of LT4 failures. and I'm not talking opti or water pump which can be considered maintence at the rate they fail. I'm talking lower end damage. bearings, or other failures requiring major work. ie: rebuild
and the LT1 Impala guys are seeing their fair share of LT1 lower end failures such as bearings, or even cam bearings after top end work. so weather your afraid your going to jink yourself, :_dupe: or not, it's a real fact.
and the LT1 Impala guys are seeing their fair share of LT1 lower end failures such as bearings, or even cam bearings after top end work. so weather your afraid your going to jink yourself, :_dupe: or not, it's a real fact.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Re: LT4 failure modes (larryfs)
"Plenty of LT4 failures"? Dunno 'bout that. I'm only aware of 3 failed LT4s...the guy over in the Autocross section..."Hutch" whose GS spun a bearing during street duty...and GS #001 (John Heinricy's car) courtesy of a press guy who over rev'ed the motor. Can't really compare the LT4 to the LT1. The bottom end isn't the same. The LT4 has some subtle differences to improve oiling.
Thread Starter
Safety Car
Joined: May 2002
Posts: 4,010
Likes: 26
From: Somewhere nowhere
Re: LT4 failure modes (96GS#007)
>>(John Heinricy's car) courtesy of a press guy who over rev'ed the motor.<<
was the rev limiter removed ? or did he raise it higher?
I bounced my car off the limiter more than once :jester
and it's not like you keep your foot in it once it starts bouncing. It's a wake up call to regain your senses and look at your guages.
was the rev limiter removed ? or did he raise it higher?
I bounced my car off the limiter more than once :jester
and it's not like you keep your foot in it once it starts bouncing. It's a wake up call to regain your senses and look at your guages.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
Re: LT4 failure modes (larryfs)
>>(John Heinricy's car) courtesy of a press guy who over rev'ed the motor.<<
was the rev limiter removed ? or did he raise it higher?
I bounced my car off the limiter more than once :jester
and it's not like you keep your foot in it once it starts bouncing. It's a wake up call to regain your senses and look at your guages.
was the rev limiter removed ? or did he raise it higher?
I bounced my car off the limiter more than once :jester
and it's not like you keep your foot in it once it starts bouncing. It's a wake up call to regain your senses and look at your guages.
