Rocker Arm Assembly: Service and Repair

Rocker Arms, Valve Springs, Push Rods, Valve Tappets

Special Tools And Equipment:

Special Tool(s)

Material:

Material

CAUTION: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan can cause engine failure.

CAUTION: If components are to be reinstalled, they must be installed in the same position. Mark the components for location.

1. Remove the valve cover.
2. If removing the valve tappets, remove the lower intake manifold.
3. Remove the parts in the order indicated in the illustration and table.

Part 1 Of 2:

Part 2 Of 2:

To remove individual parts, only carry out the listed steps:

4. To install, reverse the removal procedure.

Items 1-3: Rocker Arm Removal Note
1. If the rocker arms are to be reused, they must be installed in their original location. Mark the rocker arms for location before removing.
2. If removing valve springs, rotate the crankshaft until the piston is at the top of its stroke with both the intake and exhaust valves closed prior to removing the rocker arm.

Item 7: Valve Tappet Removal Note
1. If the valve tappets are to be reused, they must be installed in their original location. Mark the valve tappets for location before removing.

Items 8-11: Valve Spring Removal Note

1. CAUTION: The piston must be at the top of its stroke with both the intake and exhaust valves closed prior to removing the valve spring.

CAUTION: If a valve drops into the cylinder, remove the cylinder head.

Hold the valve in the cylinder head.
- Remove the spark plug.
- Apply a minimum of 689 kPa (100 psi) of compressed air into the cylinder.





2. Using the special tool, compress the valve springs.





3. Remove the following:
1. Valve spring retainer key
2. Valve spring retainer
3. Valve spring
4. Valve stem seal

Item 8: Valve Spring Retainer Key Installation Note





1. CAUTION: Do not release the compressed air from the cylinder until after the valve spring keys are installed.

After installing the valve spring keys, release the air pressure from the cylinder. Install the spark plug.

Items 3-1: Rocker Arm Installation Note





1. Install the rocker arms.
- Position the rocker arms and pivots.
- Hand-start the bolts.
- Tighten the bolts in two stages.
- Stage 1: Tighten to 5 Nm (44 inch lbs.).
- Stage 2: Tighten to 32 Nm (24 ft. lbs.).