Toyota 22R-E Service Manual page 342

ENGINE – ENGINE MECHANICAL
5. INSPECT VALVE STEMS AND GUIDE BUSHINGS
(a) Using a caliper gauge, measure the inside diameter of
the guide bushing.
Bushing inside diameter:
8.010–8.030mm(0.3154–0.3161 in.)
(b) Using a micrometer, measure the diameter of the
valve stem.
Valve stem diameter:
Intake
7.970 – 7.985 mm (0.3138 – 0.3144 in.)
Exhaust .
7.965 – 7.980 mm (0.3136 – 0.3142 in.)
(c) Subtract the valve stem diameter measurement from
the guide bushing inside diameter measurement.
Standard oil clearance:
Intake
0.025 – 0.060 mm (0.0010 – 0.0024 in.)
Exhaust
0.030 – 0.065 mm (0.0012 – 0.0026 in.)
Maximum oil clearance:
Intake
0.08 mm (0.0031 in.)
Exhaust
0.10 mm (0.0039 in.)
If the clearance is greater than maximum, replace the
valve and guide bushing.
6. IF NECESSARY, REPLACE VALVE GUIDE
BUSHINGS
(a) Insert an old valve wrapped with tape into the valve
guide bushing, and break off the valve guide bushing
by hitting it with a hammer. Remove the snap ring.
HINT: Wrap the tape approx. 12 mm (0.47 in.) from
the valve stem end.
NOTICE: Be careful not to damage the valve lifter hole.
EG2–65