Question 1

How to replace the pushrod and valve rocker arm on Cadillac Escalade?

Accepted Answer

Start by removing the valve Rocker Arm cover to place all valve rocker arms pushrods and pivot support on a rack for future reinstallation according to their original locations. You must begin by removing the valve Rocker Arm bolt together with the valve rocker arms and the valve Rocker Arm pivot support as well as the pushrods. Before using the valve rocker arms and pushrods a second time you must clean them while inspecting all components to properly reinstall them where they originally belonged. Clean engine oil serves to lubricate both valve rocker arms and pushrods while flange lubrication needs to be applied to the bolts of the valve Rocker Arm. Begin by installing the valve Rocker Arm pivot support as the pushrods should properly enter the valve lifter sockets before addition of the pushrods which need proper seating within the Rocker Arm ends before the Rocker Arm bolts get tightened. After installing the rocker arms and bolts proceed to rotate the Crankshaft until the number one Piston reaches top dead center (TDC) of compression stroke positioning the cylinder number one rocker arms off lobe lift and the Crankshaft sprocket key at the 1:30 position. The engine needs to remain in the number one firing position to tighten bolt 1, 2, 7, 8 exhaust Rocker Arm bolts to 30 nm (22 ft. Lbs.) and bolt 1, 3, 4, 5 intake bolts to 30 nm (22 ft. Lbs.). Tighten valve Rocker Arm bolts leading to cylinders 3-6 and 7-8 exhaust to specifications of 30 nm while tightening bolts of cylinders 2-5 and 7-8 intake to 30 nm after the Crankshaft completes a 360-degree rotation. Complete the valve Rocker Arm cover installation as the last step.

Question 2

How to replace the pushrod and valve rocker arm on Cadillac Escalade EXT?

Accepted Answer

A rack will serve to keep the original positions of valley rocker arms and pushrods while you disassemble their components. To begin, remove the Rocker Arm cover while placing the rocker arms along with pushrods and pivot support into the rack. After Rocker Arm bolt uninstallation comes the removal of rocker arms and Rocker Arm pivot support followed by taking out the pushrods. Clean all rocker arms before inspecting them together with their pushrods. Engine oil lubrication should be applied to both the rocker arms and pushrods during installation and the flange of Rocker Arm bolts must receive attention for lubrication as well. Position the Rocker Arm pivot support before both ends of the pushrods and valve lifter sockets reach their fitting position but leave the Rocker Arm bolts untightened. During the procedure the motor needs to be positioned at top dead center (TDC) for compression stroke where the number one Piston rests while the Rocker Arm lobes remain inactive and the Crankshaft sprocket points at 1:30 mark. The current engine position requires torquing Exhaust Valve bolts for cylinders 1, 2, 7, 8 to 30 nm (22 ft. Lbs.) simultaneous with Intake Valve bolts for cylinders 1, 3, 4, 5 at 30 nm (22 ft. Lbs.). After turning the Crankshaft fully by 360 degrees tighten Rocker Arm bolts of cylinders 3, 4, 5 and 6 exhaust valves to 30 nm (22 ft. Lbs.) while cylinder 2, 6, 7 and 8 intake valves should be torqued to 30 nm (22 ft. Lbs.). Install the Rocker Arm cover as the last step.

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