ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 003-011   Rocker Lever Cover

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Disconnect the batteries. Refer to Procedure 013-009 in Section 13.
• Disconnect the crankcase pressure sensor. Refer to Procedure 019-445 in Section 19.
• Remove the crankcase breather tube and drain tube. Refer to Procedure 003-018 in Section 3.
• Remove the variable geometry turbocharger actuator air supply line, if equipped. Refer to Procedure 010-118 in Section 10.

Remove the capscrews.

Remove the rocker lever cover and gasket.

NOTE: Rocker lever cover configurations will be different based upon if the cover is center bolted or perimeter bolted. The rocker lever cover can also be taller if the engine is equipped with engine brakes.

Check the isolators for cracks, tears, or brittleness.

Replace the capscrew assembly if isolators are damaged.

Check the gasket for cracks in the silicone covering.

Replace the gasket if cracks are present.

Check the isolators for cracks, tears, or brittleness.

Replace the isolators if any damage is found.

Check the gasket for cracks on the sealing surface.

Replace the gasket if damage is present.

Replace the gasket if it is removed from the groove in the rocker lever cover.

Place the gasket on the cylinder head. Be sure the gasket is properly aligned around the cylinder head capscrews.

Install the rocker lever cover and capscrews.

Tighten the capscrews.

NOTE: If the gasket has been removed from the rocker lever cover, a new gasket must be installed.

The following installation procedure must be used when installing the press in gasket.

1. Press the molded gasket into the corners of the rocker lever cover.
2. Press the gasket around the capscrew mounting holes.
3. Press the remaining gasket into the rocker lever cover.

Install the rocker lever cover and capscrews.

Tighten the capscrews in the sequence shown.

Install the valve cover gasket into the groove of the rocker housing cover. Press the molded gasket into the corners of the valve cover, then press the remaining gasket into the remainder of the groove.

Install the valve cover onto the rocker housing.

Install and tighten the valve cover mounting capscrews. Start with the center capscrews and work outward in a spiral pattern.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Install the crankcase breather tube and drain tube. Refer to Procedure 003-018 in Section 3.
• Connect the crankcase pressure sensor. Refer to Procedure 019-445 in Section 19.
• Install the variable geometry turbocharger actuator air supply line, if equipped. Refer to Procedure 010-118 in Section 10.
• Connect the batteries. Refer to Procedure 013-009 in Section 13.
• Operate the engine and check for leaks.