Rocker shaft torque specs? [Archive] - Cherokee SRT8 Forum

: Rocker shaft torque specs?


retro-king
04-29-2009, 09:01 AM
Does anyone know what they are?

ekaz
04-29-2009, 09:29 AM
I believe 25 ft/lbs. I will double check. They need to be tightened in the proper sequence as well.

robpp
04-29-2009, 10:39 AM
Rocker arm INSTALLATION




CAUTION: The longer push rods are for the exhaust side, and the shorter push rods are for intake side.


1. Install the push rods in the same order as removed.
2. Install the pushrod retaining plate (1) special tool 9070.
http://i300.photobucket.com/albums/nn11/robpp/ra1.gif
http://i300.photobucket.com/albums/nn11/robpp/ra2.gif







CAUTION: Ensure that retainers (2) and rocker arms (4) are not overlapped when torquing bolts.

CAUTION: Verify that pushrod is installed into rocker arm (4) and tappet correctly while installing rocker shaft assembly. Recheck after rocker shaft has been torqued to specification.





CAUTION: The rocker shaft assemblies are not interchangeable between intake and exhaust. The intake rocker arms are marked with the letter “I”.

http://i300.photobucket.com/albums/nn11/robpp/ra3.gif

3. Install rocker shaft assemblies in the same order as removed.
4. Tighten the rocker shaft bolts to 22 N·m (195 in. lbs.) torque,using the sequence provided.
CAUTION: DO NOT rotate or crank the engine during or immediately after rocker arm installation. Allow the hydraulic roller tappets adequate time to bleed down (about 5 minutes).






5. Remove pushrod retaining plate (1) special tool 9070.




6. Install cylinder head cover (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTALLATION) .

AT'sGCSRT8
04-29-2009, 10:46 AM
Be careful with those bolts they are pretty soft steel. When I first removed them I had some that were pretty twisted from the factory.

retro-king
04-29-2009, 11:38 AM
Rocker arm INSTALLATION




CAUTION: The longer push rods are for the exhaust side, and the shorter push rods are for intake side.


1. Install the push rods in the same order as removed.
2. Install the pushrod retaining plate (1) special tool 9070.
http://i300.photobucket.com/albums/nn11/robpp/ra1.gif
http://i300.photobucket.com/albums/nn11/robpp/ra2.gif







CAUTION: Ensure that retainers (2) and rocker arms (4) are not overlapped when torquing bolts.

CAUTION: Verify that pushrod is installed into rocker arm (4) and tappet correctly while installing rocker shaft assembly. Recheck after rocker shaft has been torqued to specification.





CAUTION: The rocker shaft assemblies are not interchangeable between intake and exhaust. The intake rocker arms are marked with the letter “I”.

http://i300.photobucket.com/albums/nn11/robpp/ra3.gif

3. Install rocker shaft assemblies in the same order as removed.
4. Tighten the rocker shaft bolts to 22 N·m (195 in. lbs.) torque,using the sequence provided.
CAUTION: DO NOT rotate or crank the engine during or immediately after rocker arm installation. Allow the hydraulic roller tappets adequate time to bleed down (about 5 minutes).






5. Remove pushrod retaining plate (1) special tool 9070.




6. Install cylinder head cover (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTALLATION) .

I know that is is the proper torque setting for the 5.7 which is all I can find, but does anyone know if it is the same as the 6.1? I checked the before pulling then and they seemed to be at 25lb not the 16.25 that is shown above. That is why I am questioning if the 5.7 and 6.1 are the same. Anyone???

AT'sGCSRT8
04-29-2009, 12:29 PM
They are the same. Yours like mine were overtorqued from the factory.

robpp
04-29-2009, 03:13 PM
the information I posted came from the 6.1 section of the Service manual.
i dont know/care if they are the same for the 5.7 but I do know this info i posted was for the 6.1.

FYI: There is only ONE service manual for ALL models with different sections for each motor.

you're welcome.....

retro-king
04-29-2009, 03:29 PM
the information I posted came from the 6.1 section of the Service manual.
i dont know/care if they are the same for the 5.7 but I do know this info i posted was for the 6.1.

FYI: There is only ONE service manual for ALL models with different sections for each motor.

you're welcome.....


Thanks man. I appreciate it. I had already figured out that both engines use the same shaft and bolts so the specs would be the same. I had seen the pictures you posted on another site, but it was pertaining to a 5.7. That is why I questioned it, not to mention, ekaz posted 25lb, which is what they were torqued to from the factory. I torqued them to 16.5lb... close enough. thanks again everyone

F360
04-30-2009, 09:15 AM
I will be doing heads and came soon, is it a must to have the "special tool 9070"? do I need any additional tools and how can I order them?

robpp
04-30-2009, 09:54 AM
F360:
I cant answer as to whether or not you need these special tools but i did want to share where you can get them if needed:

http://www.millerspecialtools.spx.com/

Blown-WK
04-30-2009, 10:11 AM
I will be doing heads and came soon, is it a must to have the "special tool 9070"? do I need any additional tools and how can I order them?

I believe the tool is only necessary if you want to keep the pushrods in place while you remove the rocker shaft. If you are doing heads/cam you will need to pull the pushrods out anyway.

AT'sGCSRT8
04-30-2009, 01:50 PM
^^Without the tool those push rods can be a pain in the azz.

retro-king
05-03-2009, 10:45 AM
^^Without the tool those push rods can be a pain in the azz.


Very easy to do once you "decide" to try your hook style dental pick! I fought with them for a while and then I finally decided to use my snap-on hook pick. Got it done in a few minutes after that revelation! I am sure any brand of mini pics will do though. Trust me, it works!