Toyota 4-Runner 1985 Repair Manual page 49

EM-20
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ENGINE MECHANICAL - Cylinder Head
(b) Using a micrometer, measure the diameter of the valve
stem.
(c) Subtract the valve stem measurement from the va
guide measurement.
If the clearance is greater than the following values, replace
the valve and guide:
Maximum intake clearance: 0.08 mm (0.0031 in.)
Maximum exhaust clearance: 0.10 mm (0.0039 in.)
10. IF NECESSARY, REPLACE VALVE GUIDE
(a) Using a brass punch and hammer, break the valve
guide.
(b) Heat the cylinder head to about 90°C (194°F).
(c) Using SST and hammer, drive out the valve guide.
SST
09201-60011
(d) Heat the cylinder head to about 90°C (194°F).
(e) Using SST and hammer, drive in a new valve guide
until the snap ring makes contact with the cylinder
head.
SST 09201-60011