Toyota 1 MZ–FE Manual page 83

1MZ–FE ENGINE – ENGINE MECHANICAL
B. Inspect for cracks
Using a dye penetrant, check the combustion cham–
ber, intake ports, exhaust ports and cylinder block
surface for cracks.
If cracked, replace the cylinder head.
4. CLEAN VALVES
(a) Using a gasket scraper, chip off any carbon from the
valve head.
(b) Using a wire brush, thoroughly clean the valve.
5. INSPECT VALVE STEMS AND GUIDE BUSHINGS
(a) Using a caliper gauge, measure the inside diameter of
the guide bushing.
Bushing inside diameter:
5.510 – 5.530 mm (0.2169 – 0.2177 in.)
(b) Using a micrometer, measure the diameter of the
valve stem.
Valve stem diameter:
Intake
5.470 – 5.485 mm (0.2154 – 0.2159 in.)
Exhaust
5.465 – 5.480 mm (0.2152 – 0.2157 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.)
EG2–83