OEM 2008 Chevrolet Express 3500 Pushrod

2008 Chevrolet Express 3500 Parts Questions & Experts Answers

• Q: How to replace the pushrod and valve rocker arm on 2008 Chevrolet Express 3500?

  A: To remove the valve Rocker Arm cover, do the following first. It is essential to arrange the valve rocker arms, pushrods, and pivot support in a rack, so that they could be installed to their original locations. Next, unscrew the bolts of the valve Rocker Arm, next unscrew the valve rocker arms and the valve Rocker Arm pivot support, then unscrew the pushrods. Clean the valve rocker arms and pushrods, inspect. During reinstallation, lubricate the valve rocker arms and pushrods with clean engine oil and lubricate the flange of the valve Rocker Arm bolts as well. Install the valve Rocker Arm pivot support so that the pushrods seat right on the valve lifter sockets then install the pushrods and make sure they seat so that the ends of the rocker arms seat without tightening the Rocker Arm bolts. Go ahead and install the rocker arms and bolts. Several people are turning the Crankshaft until the numbers one Piston reaches the top dead center of compression stroke with cylinder number one rocker arms off lobe lift and the Crankshaft sprocket key on the 1:30 position. With the engine in the number one firing position, apply a bolt tightening sequence to 30 n.m 22 lb ft to the valve Rocker Arm bolts on the cylinders 1, 2, 7 and 8 exhaust, and cylinders 1, 3, 4 and 5 intake. Move the Crankshaft 360 degrees forward and next tighten the valve Rocker Arm nut for cylinder exhaust 3, 4, 5 and 6 to 30 n.m (22 lb ft) and for cylinder intake 2, 6, 7 and 8 to 30n.m (22 lb ft). Finally, tighten the valve Rocker Arm cover.