How tight should rocker arms be?
The bolts should be tightened with a torque wrench to 124 inch-pounds, then tightened an additional 30 degrees of clockwise rotation. The most likely cause for the loose rocker arm bolts in your engine is either inadequate tightening originally, or an effort to adjust the rocker arms at some point in the engine’s life.
Should my rocker arms be loose?
The stock style rockers really should not just get loose. You might have very worn rockers. You should have compared the tips where they hold the valve and push rod to see if they are mashed out.
How do I adjust my LS valves?
When the exhaust valve just begins to open on the first cylinder in the firing order, adjust the intake valve by loosening the adjusting nut slightly while spinning the pushrod until you feel lash in the rocker arm. Tighten the adjusting nut until the slack is taken out of the rocker arm and pushrod.
How much torque should I put on my rocker arms?
If you’re using grade 8 bolts, such as the Harland Sharp ones we include with our rocker arms, you install them with motor oil and torque them to 25 to 30 foot-pounds. Did you find the recommended reading relevant to this discussion?
How to torque the rocker arms on a 3800pro?
Slowly thread the rocker bolts into the cylinder head. Be sure that the pushrods are correctly positioned into the pushrod seats (see figure 3). Torque rocker bolts to 25 foot pounds using fluid motion to avoid false torque readings. Continue to install each set of two rocker arms until you are complete.
Where can I find the latest torque specs?
Find the most up-to-date torque spec listings in electronic format. FelPro-Only.com is your convenient source for advanced sealing information. It’s the place to learn and share “tricks of the trade,” find proper diagnosis and installation instructions, and enjoy easy access to parts reference.
What should I know about the rocker arms?
Rocker arms are just torqued to specs. The most important thing is that the push rods are installed correctly. They are different lengths. GM recommends new lower intake bolts, and have updated the torque specs. On rocker arms and lower intake bolts. More Questions For… The intake and exhaust rocker / Pushrods are labeled in the picture below.