NOTE
Installing the rocker arms and rotating the crankshaft with the valve train loaded can result in bent pushrods, damaged bushings or a warped support plate.
1. Rotate the crankshaft to position both lifters of the cylinder being serviced on the base circle (or lowest position) of the cam lobe.
2. See Figure 3-82. Place the rocker arm support plate assembly into the rocker housing and loosely install four rocker arm support plate bolts with flat washers.
NOTE
Engine in chassis: Final tighten rocker arm support plate bolt on rear left side of rear cylinder using 3/8 in. drive torque wrench with 1/2 in. flank drive SNAP-ON “DOG BONE” TORQUE ADAPTER (Part No. FRDH161) or equivalent.
3. Tighten rocker arm support plate bolts.
a. Following the sequence shown, alternately tighten each of the four rocker arm support plate bolts 1/4 turn at a time until snug.
b. Following the same sequence, tighten the bolts to 18-22 ft-lbs (24.4-29.8 Nm).
4. Verify that both pushrods spin freely.
NOTE
Always service each cylinder separately. After the first cylinder is serviced rotate the crankshaft to find the base circle on the second cam.
5. Repeat steps on remaining cylinder.
6. Complete installation of the pushrod covers.
a. Verify that the O-ring ends of the upper and lower pushrod covers fit snugly into the cylinder head and lifter cover bores.
b. Insert the upper edge of spring cap retainer into the cylinder head bore leaving the bottom edge free.
c. Insert blade of small screwdriver between bottom edge of spring cap retainer and top of spring cap.
NOTE
For best results, verify that screwdriver, spring cap and spring cap retainer are free of grease and oil.
d. See Figure 3-83. Press spring cap down with tip of screwdriver and slide bottom edge of retainer towards tip of screwdriver.
e. Verify that spring cap retainer seats tightly against upper pushrod cover.
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