Tighten the M10 cylinder head bolts following the tighten-
ing sequence [1 ∼ 10].
Torque - Cylinder Head Bolts (M10):
30 N·m (3.1 kgf·m, 22 ft·lb)
52 N·m (5.3 kgf·m, 38 ft·lb)
Tighten the M6 cylinder head bolts [A].
Torque - Cylinder Head Bolts (M6): 12 N·m (1.2 kgf·m, 106
Tighten the following parts (see Engine Installation in the
Engine Removal/Installation chapter).
Upper Adjusting Collar
Upper Adjusting Collar Locknut
Upper Engine Mounting Bolts
Front Camshaft Chain Guide [A]
Rear Camshaft Chain Guide [B]
New O-rings [C]
Apply grease to the new O-ring.
Torque - Front Camshaft Chain Guide Bolt (Upper) [E]: 25
N·m (2.5 kgf·m, 18 ft·lb)
Front Camshaft Chain Guide Bolt (Lower) [F]: 12
N·m (1.2 kgf·m, 106 in·lb)
Rear Camshaft Chain Guide Bolt [G]: 25 N·m (2.5
kgf·m, 18 ft·lb)
Install the removed parts (see appropriate chapters).
Cylinder Head Warp Inspection
Clean the cylinder head.
Lay a straightedge across the lower surface of the cylinder
head at several positions.
Use a thickness gauge [A] to measure the space between
the straightedge [B] and the head.
Cylinder Head Warp
– – –
Service Limit: 0.05 mm (0.002 in.)
If the cylinder head is warped more than the service limit,
If the cylinder head is warped less than the service limit,
repair the head by rubbing the lower surface on emery
paper secured to a surface plate (first No. 200, then No.
ENGINE TOP END 5-29