Inspect And Grind Valves - Toyota 22R-E Service Manual

ENGINE – ENGINE MECHANICAL
(f) Gradually heat the cylinder head to approx. 90SC
(194S F).
(g) Using SST a and hammer, drive in a new valve guide
bushing unit the snap ring makes contact with the
cylinder head.
SST 09201–6001 1
(h) Using a sharp 8 mm (0.31 mm) reamer, ream the valve
guide bushing to obtain standard specified clearance
(See page EG1–23) between the valve guide bushing
and new valve.

11. INSPECT AND GRIND VALVES

(a) Grind the valve only enough to remove pits and
carbon.
(b) Check that valve is ground to the correct valve face
angle.
Valve face angle: 44.5S
(c) Check the valve head margin thickness.
Standard margin thickness: 1.0 mm (0.039 in.)
Minimum margin thickness: 0.6 mm (0.024 in.)
If the valve head margin thickness is less than mini–
mum, replace the valve.
(d) Check the surface of the valve stem tip for wear.
If the valve stem tip is worn, regrind it with grinder or
replace the valve if necessary.
NOTICE: Do not grind off more than minimum overall
length.
Minimum overall length:
Intake 113.0 mm (4.449 in.)
Exhaust 111.9 mm (4.406 in.)
EG1–25