15 - Engine
06 - Cylinder Head
00 - General
15 - 47
9813/7400-1
15 - 47
Remove
1. Progressively remove the cylinder head bolts in
reverse order, starting at bolt 18. Note that the
bolts MUST NOT be re-used. Discard the bolts.
2. Carefully lift the cylinder head from the
crankcase. If necessary use a soft face hammer.
DO NOT use a lever to separate the cylinder
head from the crankcase. Discard the head
gasket.
3. Using a suitable cleaning agent, carefully remove
all traces of the head gasket material from the
cylinder head and crankcase mating faces.
Consumable: Cleaner/Degreaser - General
purpose solvent based parts cleaner
4. Check the cylinder head and crankcase mating
faces for signs of damage and distortion, refer to
Technical Data (PIL 15-06).
Before Assembly
1. Obtain the correct new cylinder head bolts. Note
that the original bolts MUST NOT be re-used.
2. Obtain the correct replacement head gasket.
Note the number of identification holes as shown
at X.
3. Make sure that all items are clean and free from
damage and corrosion.
Assemble
The cylinder head bolts are tightened using a torque
and angle method, refer to Fasteners and Fixings,
General, Introduction (PIL 72-00).
1. Replacement is the reversal of the removal
procedure.
2. Make sure that the location dowels are correctly
installed into the crankcase. Use a dowel punch
to install the dowels as required.
3. Position a new head gasket on to the crankcase
mating face. Make sure that the gasket is
installed the correct way around and correctly
located over the dowels.
4. Lower the cylinder head on to the crankcase.
Make sure that the cylinder head is correctly
located on the dowels. Install new cylinder head
bolts. Tighten the bolts in five stages, use the
torque and angle method, refer to Fasteners and
Fixings, General, Introduction (PIL 72-00).
4.1. Tighten the bolts, starting with the middle
pair and working outwards (in sequence
1-18) to the 1st stage pre-torque.
Special Tool: Torque Wrench (10-100Nm)
(Qty.: 1)
4.2. Then, further tighten the bolts, starting with
the middle pair and working outwards (in
sequence 1- 18) to the 2nd stage pre-
torque.
4.3. Then, re-tighten the bolts, starting with
the middle pair and working outwards (in
sequence 1-18) to the 3rd stage pre-torque.
4.4. Use the angle gauge to angle tighten the
bolts, starting with the middle pair and
working outwards (in sequence 1-18) to the
4th stage pre-torque. As a visual check,
matchmark the bolts to the cylinder head
before you start. When the bolts have
been angle tightened, the matchmarks will
appear as shown at Y.
4.5. Finally, angle tighten the bolts, starting with
the middle pair and working outwards (in
sequence 1- 18) for the final stage torque.
Table 47.
Description
Torque Value
Cylinder head to
crankcase bolts 1-18
- first stage torque
40N·m
- second stage torque
75N·m
- third stage torque
75N·m
- fourth stage torque
90°
- final stage torque
180°