danbap

iTrader: (6)

I'm going to go look at a 6.0l that the guy has no info on. Ive found out how to tell if it is an lq4 or lq9 but not what year it is. also what are the years to stay away from? i know some years have a different length crank. more info please.

thanks,
Dan.

E-Works

iTrader: (4)

i recently bought a lq4 i assume. iron block 317 heads out of an 2004 h2


is it so??

NemeSS

iTrader: (127)

what info do u have about it? there is realy nothin wrong with any yrs.

NemeSS

iTrader: (127)

6.0 were available from 00-present.

crosstraining

iTrader: (1)

I think 317 aluminium heads are an LQ9
Are the heads aluminuium?

sum guy

iTrader: (4)

I had a 2001 motor thad had bad piston slap. I did some research on it. It is caused because a cylinder has a certain tolerance and the piston has a tolerace if they were all good they would throw what ever piston in what ever hole, if a small piston went in a big hole it would cause the noise. In 2003 they changed the tolerances and matched pistons to cylinders. I would do a 03 or newer if you wanted to be sure and get a quite motor.

V8Rumble

iTrader: (9)

Going from memory here, but the '00-'01 engines were the ones with the (shorter|longer - can't remember which right now) crankshafts, so if you get one that's newer than that, you should have the "normal" length crank.

danbap

iTrader: (6)

would like more info on the crank if anyone has it?? that seems like the only bad thing between the years.

danbap

iTrader: (6)

so far from what ive read dont hold me to it is the heads are the same the only real difference is the pistons lq4 dished lq9 flat top. if its together some one (forgot who) had a great idea of running something across the tops of the piston through the spark plug hoel if you feel a ridge its a lq4

danbap

iTrader: (6)

the only info he has that its a 6.0l thats it. what about the crank problem? dosn't it effect bolting the trans/converter to it?

crosstraining

iTrader: (1)

I think you are right. I knew about the pistons, but I couldn't remember if the heads were the same.

lowerthanyou00

iTrader: (8)

the 99 and 00 blocks have a longer crank this will not allow a 4L60 or 700 or ls t56. a 4L80 or 400 will fit but otherwise theres no way around it short of changing out the crank, the newer ones 01s used a bolt on spacer that goes in between the flexplate and the crank. heres a link to my thread on turdgen for pics n more info. http://www.thirdgen.org/techboard/lt...0-lq4-6-a.html

gofastwclass

iTrader: (2)

It's only a depth thing. Some cranks are .400" shorter than others and need a $37 adapter from GMPP to use an older style (pre98) trans. The "normal" Gen III spacing is the .400" shorter design while I have read somewhere that all 4L80E equipped engines had the longer crank and are essentially using the old style spacing for the torque converter. I can't find my notes on that and never had a 4L80E trans or way to verify it is only 4L80 equipped engines. The long crank engines are easy to spot though, on "normal" Gen III engines the crank flange is flush with the seal while the "long" ones stick out. If you do get the short crank engine, don't forget new longer flexplate bolts when you buy the adapter.

danbap

iTrader: (6)

so if I'm going to be using a th400 i actually don't have to worry about it? and I'm a litttle confused by gofast it seems that it doesn't really matter one way or another all you have to do is buy an adapter?? so there are only trans that the crank affects?

G-Body

iTrader: (4)

The 99-00 6.0L`s have the longer crank that fits with th350`s, 400`s, 700r4`s, 4l80e`s, and pre 98 4l60e`s They also have steel heads.

317 heads are basically LS6 heads with larger chambers. They were used on both LQ4`s and LQ9`s. The difference between an LQ4 an 9 is just in the pistons.

gofastwclass

iTrader: (2)

I figured you would know what years / variations, etc.

Sorry for the confusion. Nope, it doesn't matter one way or another, you just have to positively know what year your trans is and which style crank you have on the engine. This situation also affects manual transmissions but you can't use the spacer for those, you need a specific flywheel.

Hope this and what G-Body said clears things up.

Old Geezer

iTrader: (3)

The VIN may be etched,[lasered on], on the dr side, rear edge of the block. If the trans is there, there should be a pair of numbers at the rear of the block, and on the bell hsg flange. If it's the original combo, they should match.

Jim85IROC

iTrader: (6)

As mentioned, the 99-00s got the longer crank. They also received iron heads. The 2001+ models got the aluminum 317 heads. Both LQ4 and LQ9 got the same heads, the difference in the LQ9 was the pistons, wristpins and connecting rods, as well as the cam. The LQ9 had flat top pistons with floating wrist pins.

danbap

iTrader: (6)

i just picked up a 6.0l and it has the shorter crank the flexplate has a dish in it (not straight) what do i need to bolt up a th400?