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Push Rod: Service and Repair



Valve Rocker Arm and Push Rod Replacement
Removal Procedure





1. Remove the valve rocker arm cover.

Important: If the rocker arms are to be reused, mark the relationship and location of the rocker arm to ensure the proper installation of the rocker arm.

2. Remove the rocker arm bolts.
3. Remove the rocker arms.





4. Remove the rocker arm pivot support.





Important: If the pushrods are going to be reused, mark the location and position of the pushrod to ensure the proper installation of the pushrod.

5. Remove the pushrods.

Installation Procedure

Important: When reusing the valve train components, always install the components to the original location and position.





1. Lubricate the valve rocker arms and pushrods with clean engine oil.
2. Lubricate the flange of the valve rocker arm bolts with clean engine oil. Lubricate the flange or washer surface of the bolt that will contact the valve rocker arm.
3. Install the valve rocker arm pivot support.

Important: Make sure that the pushrods seat properly to the valve lifter sockets.





4. Install the pushrods.

Important: Make sure that the pushrods seat properly to the ends of the rocker arms. DO NOT tighten the rocker arm bolts at this time.





5. Install the rocker arms and bolts.
6. Rotate the crankshaft until the number one piston is at top dead center (TDC) of the compression stroke.In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position. The engine firing order is 1,8,7,2,6,5,4,3. Cylinders 1,3,5 and 7 are the left bank. Cylinder 2,4,6 and 8 are the right bank.

Notice: Refer to Fastener Notice in Service Precautions.

7. With the engine in the number one firing position, tighten the following valve rocker arm bolts:
^ Tighten the cylinders 1,2,7 and 8 exhaust valve rocker arm bolts to 30 Nm (22 ft. lbs.).
^ Tighten the cylinders 1,3,4 and 5 intake valve rocker arm bolts to 30 Nm (22 ft. lbs.).
8. Rotate the crankshaft 360 degrees.
9. Tighten the following valve rocker arm bolts:
^ Tighten the cylinders 3, 4, 5 and 6 exhaust valve rocker arm bolts to 30 Nm (22 ft. lbs.).
^ Tighten the cylinders 2, 6, 7 and 8 intake valve rocker arm bolts to 30 Nm (22 ft. lbs.).
10. Install the valve rocker arm cover.
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