Need help, doing a Headgasket Repair (2002 V6)

[Pacho]

I have the haynes manual and I used it last time when I performed my LIM gasket replacement, but someone told me there is a new lower manifold tightening sequence? Could someone post this up, I searched on here but I cannot find it. I think the cylinder head bolt tightening sequence is the same but just in case this is what I'm using below.

For LIM I'm currently using:
Completely tighten the middle four bolts to step 1 of 62 in-lbs and a step 2 of 115 in-lbs. Then tighten the 4 end bolts to a step 1 of 62 in-lbs and a step 2 of 115 in-lbs."

For cylinder head bolts I'm using:
Step 1 tighten to 44 ft-lbs (2002 and later), and a step 2 tighten an additional 95 degrees (2001 and later).

[cherrington17]

i'm pretty sure thats what i used, when i did mine.

[Pacho]

http://aklr.free.fr/envrac/GM_3.1_3.4_TB.pdf

GM has designed a new intake manifold gasket (Part #89017279) to help resolve the
above-mentioned condition. The material used in the revised gasket has been changed in
order to improve the sealing qualities of the gasket. When replacing the gasket, the intake
manifold attaching bolts must also be renewed. These revised bolts have a pre-applied
thread locking compound. These bolts are available with Part #11588915 for the shorter
bolt and Part #11588914 for the longer bolt.
Before the installation of the intake, clean all intake manifold and block surfaces of any
debris and oils.
NOTICE: An oil leak may result if the vertical bolts (1) shown below are not tightened
before the diagonal bolts (2). Diagonal bolts may require a crows foot tool to tighten.
1. Tighten the vertical (1) lower intake manifold bolts to 62 in/lbs. (7 N-m).
2. Tighten the diagonal (2) lower intake manifold bolts to 62 in/lbs. (7 N-m).
3. Tighten the vertical (1) lower intake manifold bolts to 115 in/lbs. (13 N-m).
4. Tighten the diagonal (2) lower intake manifold bolts to 18 ft/lbs. (25 N-m).

[cherrington17]

doesn't that 2nd bulletin say virtually the same as the first?

tighten the vertical 4, to 62.
tighten the diagonal 4 to 62
tighten the vertical to 115

the only difference is the diagonal 4 get tightened more, afterward. 18ft/lbs instead of 115in/lbs.

interesting...