Camshaft Oil Seal: Service and Repair

CAMSHAFT AND CAMSHAFT OIL SEAL
REMOVAL AND INSTALLATION

REMOVAL SERVICE POINTS
[[A]] CAMSHAFT SPROCKET REMOVAL





1. Use special tools MB990767 and MD998719 to loosen the camshaft sprocket securing bolt.
2. Remove the camshaft sprocket.

[[B]] ROCKER ARM AND SHAFT ASSEMBLY REMOVAL





1. Install special tool MD998443 as shown in the illustration so that the lash adjusters will not fall out.

CAUTION: Never disassemble the rocker arm and shaft assembly.

2. Loosen the rocker arm and shaft assembly mounting bolt, and then remove the rocker arm and shaft assembly with the bolt still attached.

INSTALLATION SERVICE POINTS
]]A[[ ROCKER ARM AND SHAFT ASSEMBLY INSTALLATION
1. Temporarily tighten the rocker shaft with the bolt so that all rocker arms do not push the valves.





2. Fit the rocker shaft spring from the above and position it so that it is right angles to the plug guide.

NOTE: Install the rocker shaft spring before installing the rocker arm and rocker arm shaft on the exhaust side.

3. Tighten the rocker arm and shaft assembly mounting bolt to the specified torque.
Tightening torque: 31 ± 3 Nm (23 ± 2 ft. lbs.)
4. Remove special tool MD998443.





5. Make sure that the notch in the end of the rocker arm shaft is facing the direction shown.

]]B[[ CAMSHAFT OIL SEAL INSTALLATION





1. Apply engine oil to the camshaft oil seal lip.
2. Use special tool MD998713 to press-fit the camshaft oil seal.

]]C[[ CAMSHAFT SPROCKET INSTALLATION





1. Install the camshaft sprocket.
2. Use special tools MB990767 and MD998719 to tighten the camshaft sprocket securing bolt to the specified torque.
Tightening torque: 88 ± 10 Nm (65 ± 7 ft. lbs.)