5. Inspection and Servicing of Basic Engine Parts
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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
The load is received the standard veering near the end
of the camshaft by the cam gear, resulting in rapid wear
of the en of the veering and enlargement of the side
gap. Therefore, 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
0.05-0.20
0.35
mm
Standard
Limit
Cam height
Intake
38.600-38.800
38.350
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
