lq4 common problems?
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Teching In
Joined: Mar 2011
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lq4 common problems? I am looking to pickup a used lq4 for a chevelle of mine, how many problems do you guys see when you open up these engines that have around 100k miles? My plan is to just cam it for now and wondering if camming one of these with 100k miles is a bad idea with out touching anything but springs.
Launching!
Joined: Apr 2011
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I bought a 02 LQ9 with 150,000 awhile back I did a compression test first and it had surprisingly had high/even numbers. So I pulled the heads had'em decked about .008 new springs reused valves and did a little "pocket porting" also did the Ls2 timing set
other than that i'm gonna do lifters and oil pump and be done with it..
from what I hear these motors still run pretty strong over 100,000m
other than that i'm gonna do lifters and oil pump and be done with it..
from what I hear these motors still run pretty strong over 100,000m
Last edited by pairof69s; Dec 10, 2012 at 12:03 PM.
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This is the key. I've seen 200k ls engines look brand new inside, and I've seen 50k engines that look/run like they have 500k on them. Buying a used engine is always a gamble.
Last edited by bww3588; Dec 12, 2012 at 02:02 AM.
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If you already have it out, you might as well do a ported oil pump since its apart ...the cam, push rods, and springs go with out say..and you could also rebuild the roller rockers..
Mileage doesnt mean much if it wasnt beat on... we built an ls1 out of a 99 c5..
It had 190k, did the following
ecs cam, springs, pushrods, new caps, needle bearings
Ported lingenfelter pump
new gears, and chain
ls6 conversion, new seals on everything
Added a Procharger, meth, and it had seen 9 psi consistently without a hiccup in the last 5-6 months and tons of miles.
Mileage doesnt mean much if it wasnt beat on... we built an ls1 out of a 99 c5..
It had 190k, did the following
ecs cam, springs, pushrods, new caps, needle bearings
Ported lingenfelter pump
new gears, and chain
ls6 conversion, new seals on everything
Added a Procharger, meth, and it had seen 9 psi consistently without a hiccup in the last 5-6 months and tons of miles.
