5-20 ENGINE TOP END
Camshaft, Camshaft Chain
Installing the rear camshaft is the same as for the front
camshaft. But noting the following.
Set the rear piston at TDC.
Align the rear piston TDC mark [A] and timing mark [B]
by turning the crankshaft counterclockwise [C] 305° (left
Camshaft/Camshaft Cap Wear
Cut strips of plastigage to journal width. Place a strip
on each journal parallel to the camshaft installed in the
Measure each clearance between the camshaft and the
rocker case using plastigage.
Do not turn the camshaft when the plastigage is be-
tween the journal and camshaft cap.
Torque - Camshaft Cap Bolts: 25 N·m (2.5 kgf·m, 18 ft·lb)
Remove the camshaft cap again, and measure the plasti-
gage width [A] to determine the clearance between each
journal and the camshaft cap. Measure the maximum
Camshaft Journal, Camshaft Cap Clearance
If any clearance exceeds the service limit, measure the
diameter of each camshaft journal with a micrometer.
Camshaft Journal Diameter
If the camshaft journal diameter is less than the service
limit, replace the camshaft with a new one and measure
the clearance again.
If the clearance still remains out of the limit, replace the
cylinder head and camshaft cap.
The camshaft cap and cylinder head are machined
in the assembled state, so they must be replaced as
0.028 ~ 0.071 mm
(0.0011 ~ 0.0028 in.)
0.16 mm (0.0063 in.)
26.950 ~ 26.972 mm
(1.0610 ~ 1.0619 in.)
26.92 mm (1.060 in.)
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