Is there a difference in 2004 and 2005 lq9 engines?
 

I bought a lq9 and I was told it was out of a 2005 Escalade. It has a fan on the water pump. My 2005 Denali has electric fan setup. That makes me believe it is actually 2004 or older. The reason I ask is while buying parts i discovered there are different part numbers for head gasket kits for 2004 and 2005 and don't want to buy the wrong thing. If anyone knows of any differences I would love to know what they are.

Re: Is there a difference in 2004 and 2005 lq9 engines?
 

My 02 lq9 had electric fans...not sure about the other years..I'm told there should be a casting date on the heads..or a wta sticker on the back drivers side head,, those numbers can be run by a gm tech to tell you all about the engine but I've not looked at mine.also told the only changes made were longer head bolts.

Re: Is there a difference in 2004 and 2005 lq9 engines?
 

Wta sticker..

Re: Is there a difference in 2004 and 2005 lq9 engines?
 

Not sure what you are looking at for head gasket differences between 04 and 05 for the LQ9. If you're sure it's a LQ9 there shouldn't be any differences in those years. Only thing that may be different is the head stud kit if it's a super early 2004. Bottom end on the lq9 was pretty much the same all the way through the years. Floating pins and beefier rods. What is your concern?

Re: Is there a difference in 2004 and 2005 lq9 engines?
 

AFAIK even with the stud/vs bolt situation, the gasket is the same. The defacto replacement is the GM LS2 gasket. Its whats sold by GMPP, TSP, and every other high-performance abbreviation lol. Don't spend the money for an aftermarket gasket, as the stock gasket is already MLS.

As long as the heads and deck are stock, this gasket @ .51 is what you need.

GM Part# 12589227

Re: Is there a difference in 2004 and 2005 lq9 engines?
 

I want to make sure i get the right gasket set. I looked up felpro and they list a hs26192pt2 as the set I need. One site said I needed hs26192pt. I am going with felpros info.

Re: Is there a difference in 2004 and 2005 lq9 engines?
 

I use factory LS9 gaskets on all my builds.