Removal and Installation
REMOVAL AND INSTALLATION
Required Special Tools:
- MD998443: Lash Adjuster Holder
- MD998713: Camshaft Oil Seal Installer
- MD998777: Camshaft Oil Seal Installer Adapter
- MB990767: End Yoke Holder
- MD998719: Pins
REMOVAL SERVICE POINT
[[A]] ROCKER ARMS AND SHAFT, EXHAUST REMOVAL
CAUTION:
If the lash adjuster is re-used, clean the lash adjuster. (Refer to lash adjuster inspection Inspection.)
Set special tool MD998443 to prevent the lash adjuster coming from free and falling to the floor.
[[B]] ROCKER ARM SHAFT ASSEMBLY REMOVAL
CAUTION:
Never overhaul the rocker arm shaft assembly.
[[C]] CAMSHAFT POSITION SENSING CYLINDER REMOVAL
Install the camshaft sprocket and the camshaft sprocket bolt to the camshaft. Using the special tools MB990767 and MD998719, prevent the camshaft position sensing cylinder from rotating and remove it.
INSTALLATION SERVICE POINTS
]]A[[ CAMSHAFT, RIGHT / CAMSHAFT, LEFT INSTALLATION
CAUTION:
Use care to prevent confusion of the right and left bank camshafts.
1. Apply engine oil to the camshaft journals and cams and then install the camshafts.
NOTE:
The left bank camshaft is identified by a slit 4 mm (0.16 inch) wide at the rear end of the camshaft.
2. Install the cylinder head, placing the dowel pin of the camshaft upward.
]]B[[ CAMSHAFT POSITION SENSING CYLINDER INSTALLATION
1. Mate the groove on the camshaft rear end face properly with the protrusion of the camshaft position sensing cylinder so that the camshaft position sensing cylinder can be installed.
2. Install the camshaft sprocket and the camshaft sprocket bolt to the camshaft. Using the special tools MB990767 and MD998719, prevent the camshaft position sensing cylinder from rotating and tighten it to the specified torque.
]]C[[ LASH ADJUSTER INSTALLATION
CAUTION:
If the lash adjuster is re-used, clean the lash adjuster. (Refer to lash adjuster inspection Inspection.)
Fit the lash adjuster onto the rocker arm without allowing diesel fuel to spill out. Fit special tool MD998443 to prevent the lash adjuster coming from free and falling to the floor.
]]D[[ ADJUSTING SCREW INSTALLATION
Install provisionally the screw to rocker arm, insert it so that end of the screw is flush with the edge of the rocker arm or projects slightly 3 mm (0.1 inch).
]]E[[ ROCKER ARMS AND SHAFT / ROCKER SHAFT CAP INSTALLATION
1. In accordance with the tags for the reinstallation, install the rocker arm and so on to the rocker arm shaft.
2.
Temporarily install the intake rocker arms and shaft.
NOTE:
Place the notch on the end face in the direction shown in the illustration.
3. Temporarily install the exhaust rocker arms shaft.
NOTE:
Place the notch on the end face in the direction shown in the illustration.
NOTE:
Install the rocker arm shaft with oil hole to the lower (cylinder head) side.
4. Install the rocker shaft cap.
NOTE:
Pay attention to the installation direction of the rocker shaft cap at the exhaust side.
5. Confirm the each rocker arm and rocker arm shaft assembly are in position and then tighten to the specified torque.
Tightening torque:
Exhaust side (M6): 13 ± 1 Nm (115 ± 8 in-lb)
Intake side (M8): 31 ± 3 Nm (23 ± 2 ft-lb)
]]F[[ CAMSHAFT OIL SEAL INSTALLATION
1. Use special tools MD998713 and MD998777 to install the camshaft oil seal.
2. Screw the camshaft sprocket bolt until the special tool touches the end face of the cylinder head.
3. Oil seal shall be pressed fit to position.
]]G[[ ROCKER COVER, RIGHT / ROCKER COVER, LEFT INSTALLATION
Tighten the rocker cover to the specified torque in the sequence shown in the illustration.
Tightening torque: 8.3 ± 1.0 Nm (74 ± 8 in-lb)