One thing that I have learned with internal engine parts, is that, in the end, you really need to visually inspect the heads/block/parts to find out what you have, Even though the General made changes across the board, there is always earlier equipment that somehow finds it's way in to the later years. I'm sure that GM doesn't want left overs, so they find a way to use all of the old stuff that they have...just guessing on that last statement though

 

Wow, your fired!!!!

This has been posted over and over again... the artical with that info is:

Gen III GM Small Block: Engine Builder

I personally have only seen these style 862 heads on 99-00 vehicals, how ever I have seen 2001 vehicals with the composite gaskets...

If you read the artical close enough you can see the heads he is refering to and the difference. If your to lazy I copied and attached to this thread for you...

That Is all.

 

Exactly!

Below is also some information from Enginebuilder and MAHLE/Clevite covering Victor Reinz head gaskets, in short they have a set of retrofit MLS head gaskets available for the earlier engines that originally came with composite gaskets as well as models that already came equipped with MLS gaskets.

The Issue: When the OE composite designed cylinder head gasket changed to an improved Multi-Layered Steel (MLS) design for the 4.8L & 5.3L in 2001 and 6.0L in 2002, the cylinder head gaskets were no longer interchangeable. This prevents engine builders and technicians from installing the best MLS designs in older engines of the GM LS series due to resulting coolant leaks.

The Resolution: Through vigorous testing and analysis, Victor Reinz has engineered a replacement MLS gasket design that fits GM Gen III 4.8L, 5.3L (1999-2000) and 6.0L (1999-2001) series engines. These gaskets accommodate both the early and late style head design. Additionally, the MLS design features an embossed stainless steel stopper layer. Victor Reinz utilizes state-of-the-art Intellicoat™ blue FKM elastomer coating on the “active” layers. This special coating is recognized for the outstanding ability to seal the head and block mating surfaces (up to 60RA) without the need for exotic surfacing equipment and techniques.

The Application: GM LS series Gen III and IV, 4.8L, 5.3L, 5.7L, 6.0L and 7.0L from 1999 thru 2009 are covered with these four new part numbers:

54441 - GM 4.8L VIN V, 5.3L VIN P, T & Z 1999-2007
54442 - GM 4.8L VIN C 2007-2008, 5.3L All VIN except P, T & Z 2005-2009, 5.7L 1997-2005
54445 - GM 6.0L VIN H, N & U 1999-2008
54446 - GM 7.0L 2006-2008

 

Am I still fired?

 

Yes....

 

Can I collect unemployment?

 

(Soup **** voice) NO! No soup for you!
(Indian accent) Your a bad man, a very very bad man...

 

Classic...gotta wave the long indian finger while saying the "bad man" part