Rocker Arm Assembly: Service and Repair
REMOVALNOTE: Disconnect the battery negative cable to prevent accidental starter engagement.
1. Remove the cylinder head cover.
2. For rocker arm removal on cylinder #4, Rotate the crankshaft until cylinder #1 is at TDC exhaust stroke.
3. For rocker arm removal on cylinder #1, Rotate the crankshaft until cylinder #1 is at TDC compression stroke.
4. For rocker arm removal on cylinders #2 and #3, Rotate the crankshaft until cylinder #1 is at BDC compression stroke.
5. For rocker arm removal on cylinders #5 and #6, Rotate the crankshaft until cylinder #1 is at BDC exhaust stroke.
6. Using special tool 8516 Rocker Arm Remover, press downward on the valve spring, remove rocker arm (Fig. 29).
INSTALLATION
CAUTION: Make sure the rocker arms are installed with the concave pocket over the lash adjusters. Failure to do so may cause severe damage to the rocker arms and/or lash adjusters.
NOTE: Coat the rocker arms with clean engine oil prior to installation.
1. For rocker arm installation on cylinders #4, Rotate the crankshaft until cylinder #1 is at TDC exhaust stroke.
2. For rocker arm installation on cylinder #1, Rotate the crankshaft until cylinder #1 is at TDC compression stroke.
3. For rocker arm installation on cylinders #2 and #3, Rotate the crankshaft until cylinder #1 is at BDC compression stroke.
4. For rocker arm installation on cylinders #5 and #6, Rotate the crankshaft until cylinder #1 is at BDC exhaust stroke.
5. Using special tool 8516 press downward on the valve spring, install rocker arm (Fig. 30).
6. Install the cylinder head cover.