B5.9G, B5.9LPG – Troubleshooting and Repair Manual – 003-008   Rocker Lever

15 mm

Remove the rocker lever covers.

14 mm

Loosen the adjusting screw locknuts. Loosen the adjusting screws until they stop.

13 mm, 18 mm

Remove the capscrews from the rocker lever pedestals. Remove the pedestals and rocker lever assemblies.

NOTE: Mark the push tubes to identify their location.

Remove the push tubes.

If the rocker lever and push tubes are to be inspected for reuse, follow these steps.

Remove the retaining rings and thrust washers.

Remove the rocker levers.

Remove the locknut and adjusting screw.

Clean all parts in a strong solution of detergent in hot water.

Use compressed air to dry the parts after rinsing in clean hot water.

NOTE: The pedestals are made from powdered metal and will continue to show wetness after they have been cleaned and dried.

Inspect for cracks and excessive wear in the bore and the contact surface of the valve stem.

Measure the rocer lever bore.

Inspect the pedestal and shaft.

Measure the shaft diameter.

Install the adjusting screw and locknut.

Lubricate the shaft with clean lubricating engine oil.

Position the levers on the rocker shaft.

NOTE: Be sure to assemble the intake and exhaust rocker levers in the correct location.

Install the thrust washers.

Install the snap rings.

Install push rods as marked during removal.

Make sure the dowel rings in the pedestals are installed into the dowel bores.

Inspect all cylinder head capscrews for proper length using Service Tool Part No. 3823921.

Use clean engine oil to lubricate the threads and under the heads of the capscrews.

Install the capscrews into the pedestals.

Step 1: Tighten all the cylinder head capscrews to 90 N•m [66 ft-lb].

Step 2:(Long cylinder head capscrews only) Tighten the cylinder head capscrews to 120 N•m [90 ft-lb].

18 mm

Step 3:

After the long cylinder head capscrews have been tightened to 120 N•m
[90 ft-lb], rotate all cylinder head capscrews an additional 90°.

13 mm

Tighten the 8 mm pedestal capscrews.

Adjust the valve lash. Refer to Procedure 003-004-029.

Install the rocker lever covers.