OEM Chevrolet Suburban 2500 Rocker Arm

Chevrolet Suburban 2500 Rocker Arm Parts Questions & Experts Answers

• Rocker Arms
  12556298
  Q: How to replace the valve rocker arm and push rods on Chevrolet Suburban 2500?

  A: The first step to replace valve rocker arms and push rods requires marking all Cylinder Head parts before sorting them properly to establish correct installation sequence. Commence the replacement process by taking off the valve Rocker Arm cover and proceeding to extract the valve Rocker Arm nuts along with valve Rocker Arm balls and finally removing the valve rocker arms. Pay attention since exhaust valve Pushrods exceed the length of intake valve pushrods. The replacement process starts with removing valve pushrods then the valve Rocker Arm studs and Pushrod guides before cleaning and inspecting valve rocker arms and pushrods. You should treat the threads of the valve Rocker Arm stud-to-cylinder head with gm U.S. P/N 12346004, canada P/N 10953480 or equivalent sealant before using the Pushrod guides and valve Rocker Arm studs. The torque should be set at 50 nm (37 ft. Lbs.). Check that exhaust pushrods exceed intake pushrods in length before valve Pushrod installation. Apply gm u.s P/N 12345501, canada P/N 992704 or equivalent lubricant over the valve Rocker Arm along with its ball bearing surfaces before installing all components and gently tightening valve Rocker Arm nuts to 25 nm (18 ft-lbs) through valve guides. Installation of the valve Rocker Arm cover should be the last step in the assembly process.