Still More Questions On My '99 3100 Teardown

[Jogasz28]

I've tried to locate the Timing Marks on the Dampener but have been unsuccessful. I'm trying to not have to remove the front timing cover, dampener, as I only want to replace the head gaskets,
Does anyone have a Pic of a 3.1 L82 with these marks they could send me?
I searched the Net and found the following bad news:
"The L82 ("M-code") was an updated, SFI version of the MPFI LH0, produced from 1993 through
1999
I checked the FM and found that when installing the rockers, the L82's have to be rotated to #1 and #4 firing position to set Valve Lash at no lash plus 1.5 turns.
I'm trying to not have to remove the front of the engine. I don't even know if it can be dons as removing the Dampener looks pretty damn tight.
As always, any help is much appreciated.
JogasZ28

[bszopi]

Re: Still More Questions On My '99 3100 Teardown

3x00 rockers don't require lash to be set. Just torque them to spec and go.

Sent from my Devour using Tapatalk

[Jogasz28]

3x00 rockers don't require lash to be set. Just torque them to spec and go.

Sent from my Devour using Tapatalk

Thank you!
I saw somewhere during my surfing that the Rocker Arm Nut Torque Specs have been revised.
If so, what are the new Specs?
JogasZ28

[Jogasz28]

I Removed a Rocker assembly from cylinder #1. Seemed like it need a lot more torque than 18 Lb Ft to remove it.
Is a thread locker required on reassembly? I don't remember seeing it called for in the FM procedure.

Also, the Spec Section of this Site calls for:
Rocker Arm Bolt 89 +30°

Other Sites have very different values.
__________________________________________________ ____________
Example:

http://www.torkspec.com/torkspecme.aspx?KI=12-3.1L-191ci-V6

Connects: Rocker Arm To Cylinder Head
Years: 1998-2002 Vote Record: Vote
Note: 3100 - Rocker Arm Bolts - 2 Steps: 14 FtLbs(168 Inch Lbs; +30deg
__________________________________________________ _____________

The FM calls for 18 Ft Lbs. or 216 Inch Lbs. with no angle torque added.
I want to use the latest procedure for reliability. It took too much work to get to these rockers.

TIA,

[Azrael]

GM used two different rocker setups in the 3100's. The older, small-port version mostly used a pivotball rocker setup while the new, large-port one and the later year small-ports used roller fulcrum rockers. Torque specs are different for each.

89lbs-in + 30 degrees for the pivotball rockers
14 lbs-ft + 30 degrees for the roller fulcrum rockers

[Jogasz28]

GM used two different rocker setups in the 3100's. The older, small-port version mostly used a pivotball rocker setup while the new, large-port one and the later year small-ports used roller fulcrum rockers. Torque specs are different for each.

89lbs-in + 30 degrees for the pivotball rockers
14 lbs-ft + 30 degrees for the roller fulcrum rockers

Appreciate the reply, the more info the better.
I definitely have the later roller fulcrum rockers. It is a '99 3.1 Litre.
The angle torque concerns me. Isn't it usually used for Torque-To-Yield bolts?
I can see now how setting valve lash would be all but impossible given the setup.
When I removed some of the rockers using my torque wrench, I had about
337 Inch/Lbs (approximate because it was in reverse) to
break them loose, so I was concerned.
Should I use the FM Dealer Thread Sealant, or is there a cheaper alternative?
I prefer Form-A-Gasker #2 on gaskets as it never hardens.
But I'm open to suggestions on alternate thread sealants.
Again, thanks to all for the help.