OEM GMC Yukon XL 2500 Rocker Arm

GMC Yukon XL 2500 Rocker Arm Parts Questions & Experts Answers

• Rocker Arms
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  Q: How to replace the valve rocker arm and push rods on GMC Yukon XL 2500?

  A: The process of valve Rocker Arm and push rod replacement begins by removing the Rocker Arm cover followed by arranging the components on a rack because proper reassembly depends on this order. The replacement process begins by removing the Rocker Arm bolts and then proceeding to take out the rocker arms and Rocker Arm pivot support together with the pushrods. The cleaning process should be combined with an inspection of both rocker arms and pushrod components. Engine oil lubrication for both rocker arms and pushrods must occur before reinstallation while also applying oil to the flange section of the Rocker Arm bolts. Place the Rocker Arm pivot support while verifying pushrods fit the valve lifter sockets and then position the pushrods in the rocker arms before leaving the bolts untightened. Insert the rocker arms and bolts after manually rotating the Crankshaft to reach the top dead center compression stage when the number one Piston stands at that point while the sprocket key lines up with the 1:30 position mark. The procedure for this firing position involves applying torque to 30 nm (22 ft. Lbs.) for exhaust valve bolts on cylinders 1, 2, 7 and 8 and intake valve bolts on cylinders 1, 3, 4 and 5. Follow the Crankshaft rotation by 360 degrees until you tighten all Rocker Arm bolts. The exhaust valve bolts for 3, 4, 5, 6 cylinders require 30 nm (22 ft. Lbs.) torque while the intake valve bolts for 2, 6, 7, 8 cylinders need 30 nm (22 ft. Lbs.) torque. You should install the Rocker Arm cover as the last step.