Rocker Arm Assembly: Service and Repair

Fig. 67 Camshaft Assembly.:

REMOVAL

Remove camshaft in numbered sequence, Fig. 67, noting the following:
1. Remove timing belt, refer to TIMING BELT.
2. Remove camshaft sprockets as follows:
a. While holding camshaft in position with a crescent wrench at hexagon between No. 2 and No. 3 journals, remove camshaft sprocket bolt.
b. Remove camshaft sprockets.
3. Remove camshaft oil seals using a suitable screwdriver.
4. Remove camshaft bearing caps by loosening installation bolts in two or three steps. If bearing cap is difficult to remove, gently tap on the rear portion of the camshaft with a plastic hammer.

Fig. 68 Installing Camshafts.:

INSTALLATION

Reverse removal procedure to install, noting the following:
1. Install the camshafts on the cylinder head. Ensure intake side camshaft is installed on intake side and exhaust side camshaft is installed on exhaust side. Intake side camshaft has a slot machined in the back end to drive the crank angle sensor. Once installed, the camshaft dowel pins should be in the positions as shown in Fig. 68.
2. When installing camshaft bearing caps, tighten evenly, in two or three steps.

Fig. 69 Installing Camshaft Oil Seal.:

3. When installing camshaft oil seal, use oil seal guide tool No. MD998307 and oil seal installation tool No. MD998306 or equivalents as shown, Fig. 69.
4. Install crank angle sensor as follows:
a. Ensure mating mark on housing of crank angle sensor is aligned with notch in plate.
b. Ensure crank angle sensor does not move when tightening attaching nut.
5. When installing semi-circular packing, apply liberal amount of gasket sealant onto circumference of packing.

Fig. 23 Installing Rocker Cover.:

6. When installing rocker cover, apply gasket sealant to area as shown in Fig. 23.