Cylinder Head Assembly: Service and Repair

REMOVAL AND INSTALLATION

REMOVAL SERVICE POINTS
[[A]] POWER STEERING OIL PUMP AND BRACKET ASSEMBLY REMOVAL
Remove the power steering oil pump and bracket assembly from the engine with the hose attached.

NOTE: Place the removed power steering oil pump in a place where it will not be a hindrance when removing and installing the cylinder head assembly, and secure it with a cord or wire.

[[B]] CYLINDER HEAD ASSEMBLY REMOVAL

CAUTION: Be careful not to damage or deform the plug guides when removing the cylinder head bolts. Plug guides cannot be replaced separately.





Using special tool MB991654, loosen the bolts in two or three steps in the order of the numbers shown in the illustration, then remove the cylinder head assembly.

INSTALLATION SERVICE POINTS
]]A[[ CYLINDER HEAD GASKET INSTALLATION
1. Wipe off all oil and grease from the gasket mounting surface.
2. Match the shapes of the cylinder head holes with their respective cylinder head gasket holes.

]]B[[ CYLINDER HEAD ASSEMBLY INSTALLATION





1. When installing the cylinder head bolts, the length below the head of the bolts should be within the limit. If it is outside the limit, replace the bolts.
Limit (A): 99.4 mm (3.91 inches)
2. Apply a small amount of engine oil to the thread section and the washer of the cylinder head bolt.

CAUTION:
- Always tighten cylinder head bolts at a 90 degree angle. If it is less than 90 degree angle, the bolt will loosen.
- If it is more than 90 degree angle, remove the head bolt and repeat the procedure from step 1.











3. Using special tool MB991654, tighten the bolts by the following procedure.

]]C[[ HIGH-PRESSURE FUEL HOSE INSTALLATION

CAUTION: Do not allow engine oil to enter the fuel rail.





1. Apply a small amount of new engine oil to the O-ring.
2. While turning the high-pressure fuel hose to the right and left, install the fuel rail, while being careful not to damage the O-ring. After installing, check that the hose turns smoothly.
3. If the hose does not turn smoothly, the O-ring is probably being clamped. Disconnect the high-pressure fuel hose and check the O-ring for damage.
4. Re-insert the fuel rail and confirm the hose turns smoothly.