Warranty: This genuine part is guaranteed by GM's
factory warranty.
Fits the following Vehicles:
1985-1993 Chevrolet S10 | Base, Durango, EL, Sport, Tahoe | 4 Cyl 2.5 L GAS
Chevrolet S10 Rocker Arm
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Chevrolet S10 Rocker Arm Parts Questions & Experts Answers
Q: How to replace the valve rocker arm and push rods on Chevrolet S10?
A: Start by removing the valve Rocker Arm cover before replacing the valve Rocker Arm along with push rods. Keep all components organized for future assembly operations while placing appropriate marks on them. After removing the valve rocker arms you should proceed to take out the Rocker Arm supports together with the valve Pushrods while labeling components for reinstallation. Pass all components through cleaning solvent before using compressed air to dry them. Check the valve Pushrod socket contact area for smooth motion and wear near the contact surface together with the roller pivot for damage and binding situations while also verifying the valve stem contact surface and bolt thread conditions. The end surfaces of valve pushrods must undergo inspection for limitations in oil flow and end surface deterioration and bending through flat surface rolling activities. Temporarily check the valve rocker support to identify cases of excessive wear or damage. Installation procedures require parts maintenance of original locations while keeping a logical sequence for their assembly. Operating procedure starts with valve Pushrod installation where you need to align the valve Rocker Arm support arrow in an upward direction before adding the valve Rocker Arm supports. We need to apply prelube gm p/n 12345501 or its equivalent to all three components: the valve Pushrod socket and roller pivot and valve stem tip. Install the valve Rocker Arm assemblies by gently starting the bolts which should be at locations , , , and the remaining bolts. Adjust the crankshaft balancer until the alignment mark reaches 5763 degrees toward the clockwise or counterclockwise direction from the front cover alignment tab. After installing and correctly torquing the valve Rocker Arm assemblies you do not require any further adjustment of valve lash. Complete the procedure by fastening valve Rocker Arm bolts to 30 nm (22 ft. Lbs.) before reinstalling the valve Rocker Arm cover.