i found a 05 escalade 6.0l motor hoe do i tell if its a lq9. the guy want 1000 for it with 150000km on it. is it worth it. how do i tell if it is a lq9 for sure from 2005 what else should i check on it what head stamping nubers dhould it have. thanks for help any info apprciated.

 

Pull the heads and look for flat tops. Other than that maybe go to a gm dealer and have them run a vin if they can to see about the motor?

 

This truck could have the 5.3L LM7 engine or the 6.0L LQ9.

Thu under hood belt routing or emissions sticker should show the engine size, assuming it's original.

If you get the vin, plug it in here and it'll tell you what engine it is:

http://www.compnine.com/vid.php

 

If its still in the truck look in the glove box at the RPO codes sticker. It will have LQ9 in there or LM7.

 

Oh yeah, I forgot about that! Good catch!

 

4.8/5.3L is a flat top as well.
5.3L is a stroked 4.8L
6.0L Flat top = LQ9
6.0L Dished = LQ4

If the engine is out of the truck, just look at the back of the block. It will read 4.8/5.3L or 6.0L. Pull the plug if its a 6.0L, and verify the flat top pistons.

 

Two engines only in this truck this year: The 5.3L LM7 engine or the 6.0L LQ9.

Option sticker is the easiest way to confirm.

 

Yes. You are correct.

But if the motor is out of the truck/car would you just trust what the seller is saying?


Trust... but verify

 

the engine is out of the truck is there any way too tell with it out.

 

see Post #6

 

look at the 6.0 cast on the exterior. . .drivers front if I remember...

 

If the engine is out of the vehicle, it's identification gets more difficult. The LQ4 and LQ9 engines were almost identical. Same blocks, same heads, same casting numbers.

The difference is the LQ9 got coated skirts and 10.1:1 flat-tops versus the LQ4 at 9.4:1 circular-dish, un-coated. The LQ9 also got different rods and floating piston pins. The LQ9 is basically a iron block LS2 with a truck intake manifold.

To ID this block, I'd suggest you find the vin etched into the block. The eighth digit for the LQ9 is N, LQ4 it's U.

This might help also:
http://www.hotrodlane.cc/GTO/Engine%...tification.htm

 

I thought ALL escalades got the LQ9. Please, someone show me one with a 5.3 because I have never seen it.

 

http://www.usedcars.com/vehicledetai...7&radius=10000

Out of the first one hundred on that website, five are 5.3 engines. It was the standard engine.

So, five in a hundred is 5%, a rare bird but there are some out there. It's prudent to confirm what an engine is before plunking down cash for it.

 

317s should confirm its the lq9 eh? Since the LQ4 wasn't available....Don't they have 6.0 stamped on the block also?

 

do all LQ9's have floating wrist pins......read where they only started that in 04...?

 

Ssshhhh, stop trying to interject common sense.

 

Perhaps this needs to be stated again:

 

The above is true, up until the 2005 engines. Then the LQ4 received the LQ9 rods and was truly identical to the LQ9. The skirt coatings didn't start until 2003.

 

For external identification without disassembling the engine, peeking through a spark plug hole to see the piston top is the only way.