could be damaged if it is not tightened
properly.
11. Following the tightening sequence shown in
Figure 15
, torque the fasteners in 1/2 turn incre-
ments and in two stages to the specifications.
Torque the fasteners to 1/2 the given torque, then
torque them to their final specifications:
a. Cylinder head nuts (1-4,
Figure 15
): 50 N•m
(37 ft.-lb.).
b. Cylinder head cap nut (5,
Figure 15
): 35 N•m
(26 ft.-lb.).
c. Cylinder head bolts (6 and 7,
Figure 15
): 20
N•m (15 ft.-lb.).
12. If the cylinder has also been reinstalled, torque
the cylinder bolts (A and B,
Figure 23
) to 10 N•m
(89 in.-lb.). One of the bolts sits in a recess (B,
Fig-
ure 23
) in the cylinder block.
13. If removed, install the locating pin (B,
Figure
21
) into the camshaft.
CAUTION
When rotating the crankshaft with the
cam sprocket removed, pull up on the
cam chain and keep it taut so the
chain
remains
meshed
with the
sprocket on the cam chain drive as
sembly. If the chain is not held taut,
the chain may become kinked, and
cause damage to the crankcase, the
cam chain and timing sprocket.
14. Temporarily install the alternator cover onto
the crankcase.
15. Use the flywheel bolt to turn the crankshaft
clockwise until the cylinder is a top dead center on
the compression stroke.
a. The
rear cylinder
is at TDC on the compres-
sion stroke when the T-mark (A,
Figure 9
) on
the rotor aligns with the cutout in the alterna-
tor cover (B) and when the locating pin on the
camshaft aligns (B,
Figure 21
) with the
pointer on the cylinder head (C).
b. The
front cylinder
is at TDC on the compres-
sion stroke when the I-mark (A,
Figure 11
)
on the rotor aligns with the cutout in the alter-
nator cover (B) and when the locating pin on
the camshaft (B,
Figure 21
) aligns with the
pointer on the cylinder head (C).
NOTE
A cylinder at TDC on the compression
stroke has free play in both rocker
arms, which indicates that both valves
are closed.
16. Make sure the cylinder is at TDC by pressing
each rocker arm. Both the intake and exhaust rocker
arms should have free play. If both rocker arms do
not have free play, rotate the engine an additional
360° until they do.
17. Install the cam sprocket (A,
Figure 14
). Install
the sprocket onto the camshaft so the camshaft’s lo-
cating pin fits into the cutout in the cam sprocket.
Make sure the timing mark (B,
Figure 14
) on the
cam sprocket faces out.
NOTE
When a cylinder is set to TDC on the
compression stroke, the timing mark
on the cam sprocket may not precisely
align with pointer on the cylinder
head. On some models, the mark could
be off by as much as 1/2 tooth. Consult
the notes made during removal.
18. Rotate the camshaft to remove any slack from
the rear side of the cam chain. Insert a finger into the
ENGINE TOP END
95
4
23
22
