OEM 2007 Chevrolet Express 2500 Rocker Arm

2007 Chevrolet Express 2500 Rocker Arm Parts Questions & Experts Answers

• Q: How to replace the valve rocker arm and push rods on 2007 Chevrolet Express 2500?

  A: Start the valve Rocker Arm and push rod replacement by taking off the valve Rocker Arm cover and putting valve rocker arms along with pushrods and pivot support into a rack for preservation of natural positions. Then you can start by unbolt the valve Rocker Arm bolts before removing the bolted valve rocker arms and pivot support along with pushrods. The procedure calls for cleaning valve rocker arms and pushrods which should then be lubricated with clean engine oil while including the flange of valve Rocker Arm bolts in the application. The pivot support for the valve rocker arms must be installed so pushrods can settle correctly in the valve lifter sockets while pushrods should rest correctly in the rocker arms before tightening Rocker Arm bolts. Install the rocker arms and bolts before setting the Crankshaft to top dead center compression position of Piston number one. Check that the number one rocker arms sit off lobe lift while the Crankshaft sprocket key points at 1:30 mark. During the number one firing position tighten valve Rocker Arm bolts for cylinders 1, 2, 7, 8 exhaust to 30 n.m (22 lb ft) and for cylinders 1, 3, 4 and 5 intake to 30 n.m (22 lb ft). You must turn the Crankshaft by 360 degrees before fastening all valve Rocker Arm bolts with 30 n.m (22 lb ft) for exhaust cylinders 3, 4, 5 and 6 while tightening intake bolts for cylinders 2, 6, 7 and 8 to the same torque value. The last step involves mounting the valve Rocker Arm cover.