5-26 ENGINE TOP END
Cylinder Head Removal
Engine (see Engine Removal in the Engine Removal/In-
Camshaft (see Camshaft Removal)
Remove the cylinder head nuts following sequence [1 ∼
Remove the cylinder head.
Cylinder Head Installation
The camshaft cap is machined with the cylinder head,
so if a new cylinder head is installed, use the cap that
is supplied with the new head.
The front cylinder head has a breather pipe fitting. Be
careful not to mix up the front and rear cylinder heads.
Release the stopper and push the push rod into the ten-
sioner body [A], and tighten the cap bolt only temporarily.
Replace the cylinder head gasket with a new one.
Oil Pipe [B]
Chain Guide (White) [C]
Cylinder Head Gasket [D]
Apply molybdenum disulfide oil solution to both sides of
the cylinder head nut washers and the thread of head
Temporary tighten the cylinder head nuts (M10) following
the tightening sequence [1 ∼ 4].
Torque - Cylinder Head Nuts (M10) (First): 20 N·m (2.0
kgf·m, 15 ft·lb)
Tighten the cylinder head nuts following the tightening se-
quence [1 ∼ 6].
Torque - Cylinder Head Nuts (M10) (Final): 49 N·m (5.0
kgf·m, 36 ft·lb)
Cylinder Head Nuts (M8): 25 N·m (2.5 kgf·m, 18
Cylinder Head Warp Inspection
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
– – –
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.