5. Inspection and servicing of basic engine parts
128
5.6 Camshaft and tappets
5.6.1 Camshaft
The camshaft is normalized and the cam and bearing
surfaces are surface hardened and ground. The cams
have a curve that minimized the repeated shocks on the
valve seats and maximizes valve seat life.
(1) Checking the camshaft side gap
Measure the thrust gap before disassembly. As the cam
gear is shrink-fitted to the cam, be careful when
replacing the thrust bearing.
(2) Measure the cam height, and replace the
cam if it is worn beyond the limit.
mm
Standard
Limit
Camshaft side gap
0.05-0.15
0.25
mm
Standard
Limit
Cam height
Intake
34.135-34.265
33.89
Exhaust
Push rod
Tappet
Camshaft gear
Thrust metal
Camshaft bushing
Camshaft
(Camshaft side gap)
Camshaft gear
Thrust metal
Side gap
(Cam height)
Cam height
Micrometer
Summary of Contents for 3YM30
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