LT1 life

How long does the LT1 last in mileage on average?

i'm not sure u r understanding what the LT1 is. the LT1 isn't a bolt on or add on performance peice-it's the actual engine itself. it's a beefed up 5.7L V8-just has some upgraded parts that result in greater horsepower. now since the LT1 is the engine itself, u should be asking how long the engine averages in miles before it just dies. and that all depends on how well u maintain your engine-keep it going good, 200k miles. it's like in all cars.

I do know that the LT1 is and engine I basically wanted to know exactly what you said. How long it lasts, or how many miles can you put on it on average before it starts to die.

i didn't call u stupid-but just the way you've been posting questions about the LT1 just sounded different-sry bout all that. but to answer your question again, it's just like all cars-depends on how well u maintain it~200K miles prolly the most u can get outa any car, so yea.

i have seen many go between 275,xxx and 400,xxx miles. most that seem to die early are the guys who start modded them to much. for some reason, after you put on new heads, the motor wont make it past 200,xxx. the engine in general is one of the best gm made

9c1's and SS had the iron heads, why anyone would want to put on different ones is beyond me hehe, they are nearly indestructible, and anyone with one of these cars has probably overheated it or gotten VERY close to it once or twice, the aluminum heads will melt EXTREMELY easy just overheating it once, and your done for. Your better off porting your iron heads or just looking for other areas to make power at.

Aluminum heads will not melt and have nearly flawless gasket seal for 200-300k miles just like iron. If the aluminum pistons don't melt with 1800-degree flames hitting them a thousand times per minute, the heads won't melt with 250-degree water in them. The reason you would want to choose aluminum heads is because they flow better out of the box, absorb heat allowing higher compression, and in this case make more power. Not to mention they are a lot lighter! An engine will seize, burn oil, and boil coolant long before it will melt aluminum.

First post here, sorry if I screw it up...

Yer right, aluminum heads won't melt... It takes 1500F plus degrees... but they sure love to CRaCK!... sticky T-stat, or low coolant... It really sucks to have to a head job, kuz a $3 stat was stuck... I'll stick with my heavy Iron heads, when possible.

srry I didn't mean melt like the terminator in part II lmao! But they will go bad on you from just over heating one time......keep your iron heads its the best thing about the Impalas engine vs corvette or camaro.


srry i see you all live up north lol. Overheating and heat resistance is a major player in what you do to your car down here in South Florida if you want it to live lol.

I've been in taxis (Caprices) that have 500,000 or more miles. Obviously they probably have had a few things replaced, but the drivers I talked to said that they started to rent the car at around 250 to 300 thousand miles and never had a lick of trouble. Pretty impressive, I must admit. Take care of these beassts, and they'll treat you right.