Should I rebuild my LT1 - Chevy Impala SS Forum
 
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post #1 of 9 (permalink) Old 02-05-2007, 08:35 PM
ras282
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My Fleetwood has 166,000 miles on it my dad says my bottom end is going out. So should I rebuild it or buy a new one?
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post #2 of 9 (permalink) Old 02-05-2007, 09:06 PM
chris joyce
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It's probabley not a bad idea, but you could always just put some new main bearings in it if your on a budget. If it were me I would go all out and build a monster!
post #3 of 9 (permalink) Old 02-05-2007, 10:12 PM
96 Black
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No.

Either:
A. Procure an intact used junker/yard LT1 swap-in replacement, or,
2. Build/buy an LS-(pick a number) from hell.
 
post #4 of 9 (permalink) Old 02-05-2007, 10:52 PM
louis
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What makes your dad think the bottom end is going out are you getting knock?Noises?Power Loss?Oil issues?
The thing with our LT1s are that some people tend to think most problems are internal mechanical issues when really they are just electronic component issues!

There was a post along time ago on the Z28 forums where some guy pulled his good running daily driven LT1 apart at 145,000 miles and surpisingly all the internals ie pistons,rods crank etc surfaces were just as smooth and in good condition as they were coming out of the assembly plant.
post #5 of 9 (permalink) Old 02-06-2007, 12:24 AM
MrCadillac
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these bitches(LT1's) are known for going 300k, EASY. and not burning an oil! When they go, it tends to be the rod bearings. Thats all I would replace(and the other bearings)if I did it.

But seriously... what makes your dad think the bottom end is going out?
post #6 of 9 (permalink) Old 02-06-2007, 12:27 AM
MrCadillac
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oh yea... what year is it? cause if it's a 93, your dad could be right. Also, a good idea would be to put some AutoRX thru it. Has been known to boost compression(by 5-10PSI), and really clean it out.
post #7 of 9 (permalink) Old 02-06-2007, 02:31 AM
brokencaddy
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93's as far as i know did not have the LT1.
post #8 of 9 (permalink) Old 02-06-2007, 12:42 PM
ferrstein
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I had a knock on my '94 LT1 wagon. I pulled it apart and one of the mains was wiped out, rotated about 30 degrees, and the crank shaft was cracked right across that journal.

I measured the block at that main cap, and it was good. I ended up putting a new crank, main, and rod bearings in and buttoned it back up. I didn't even remove any of the pistons or the intake manifold, etc. Car went another 150,000 miles and was still running perfectly when I sold it (had 275,000 miles on it at the time).

Bottom line: If it's a daily driver, I'd recommend just fixing what's broke. These engines really don't "wear out" if they are maintained even moderately well.
post #9 of 9 (permalink) Old 02-06-2007, 02:56 PM
MrCadillac
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Quote:
Originally posted by brokencaddy:
93's as far as i know did not have the LT1.
Yea, I suffer from short term memory loss. By the time a thread loads, i forget the title...
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