5_108.bk Page 231 Thursday, October 4, 2001 11:45 AM
REPAIR INSTRUCTIONS 3. Lubricate the threads of the rocker arm bracket mounting capscrews with clean engine oil. Install the capscrews and torque to specification using torque wrench J 24407, or equivalent.
305
4. Adjust valve lash settings as applicable. Refer to “ENGINE SETUP AND ADJUSTMENTS” on page 270 for correct specification. 306
Figure 305 — Valve Yoke 1. Rocker Arm 2. Valve Yoke 3. Yoke Adjusting Screw
4. Jam Nut 5. Valve Stem 6. Yoke Guide Pin
Rocker Arm Installation DESCRIPTION The valve rockers pivot on a shaft supported by three brackets per cylinder head. Two capscrews secure each bracket to the cylinder head. The rocker arms are operated by a camshaft through valve lifters and push rods extending through the cylinder heads. A coil spring returns each valve to the closed position, holding the rocker arm in contact with the push rod.
Figure 306 — Valve Rocker Arm Installation
INSTALLATION Refer to Figure 306. 1. Position the rocker arm assemblies on the cylinder heads. 2. Ensure that the ball end of the rocker arm adjusters are in position in the push rod cups.
Make sure that adjusting screws are retracted upward in the rocker arms. If extended far below rocker arm, the push rods can be bent when tightening the rocker arm assembly brackets.
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