5. Inspection and servicing of basic engine parts
209
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 0.05-0.20 0.35
mm
3JH4E/4JH4E 4JH4-TE/4JH4-HTE
Standard Limit Standard Limit
Cam height
Intake
38.600-38.800 38.350
39.800-40.000 39.550
Exhaust 37.800-38.000 37.550
Camshaft
Push rod
Tappet
Camshaft bushing
Camshaft gea
Thrust metal
006566-01E
Camshaft gear
Thrust metal
Side clearance
010643-00E
007709-00X
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