Yogi Bear

The main difference is the pistons. LQ4s are dished for low compression (9.5?) LQ9s are flat top for high compression (10.5?). On earlier models the rods were also different, with the LQ9s getting stronger rods. However, I have read that later models use the same rods for both motors.

xchevyx24

so which engine is the aluminum lq9?

zippy

Doesn't exist, all LQ9's are cast iron block/aluminum head. The aluminum 6.0L is an LS2.

budhayes3

iTrader: (19)

Be sure not to get a 6.0 from a 99-00...those are the ones with the longer crank and iron heads and are not a direct bolt in to a 4L60E. Make sure whatever you get is from an 01 and up.

00blackz71

I bought one this morning. Lq9 from an 02 Escalade with all accessories. The guy said something about a spacer so that it would bolt up to the 4l60e. I don't know whether he said I would have to use one off of my 5.3 or take one off of the 6.0. I haven't heard of this before. Anybody know if he is right?

WorkTruc

iTrader: (8)

Remove spacer and use flexplate from 5.3

xchevyx24

my vmax came with a aluminum block

zippy

That is a very good point. The L76 is an aluminum block. I stand corrected.

Yogi Bear

So is the L76 like an alluminum block LQ9 or something totally different? What's the HP rating on the L76?

Quik

iTrader: (7)

with a 00 Lq4 since it has the longer crank, can you put in a crank from a 03 LQ9 or is there a simpler way