WM 130/170/270 Repair Reassembly Procedures
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9.9 Cylinder Head
See Graphic: wc_gr001802 and wc_gr001803
Note: Replace the head gasket (b) whenever the cylinder head is
removed.
9.9.1 Inspect for and repair any scratches on the cylinder head (a) mounting
surface.
9.9.2 Using four M8 x 68 bolts (c) and one M8 x 35 bolt (d), secure the
cylinder head to the cylinder. Tighten the bolts in the pattern shown.
First torque all the bolts to that listed for the M8 x 35 bolts. Then, torque
only the M8 x 68 bolts to the larger value.
If you are reusing the bolts:
M8 x 35 torque to 17–19 Nm (12.3–13.7 ft.lbs.)
M8 x 68 torque to 25–27 Nm (18.1–19.5 ft.lbs.)
If you are using new bolts:
M8 x 35 torque to 17–19 Nm (12.3–13.7 ft.lbs.)
M8 x 68 torque to 28–30 Nm (20.3–21.7 ft.lbs.)
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