740 L4-2320cc 2.3L DOHC B234F (Can) (1992)
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Valve: Service and Repair
MACHINING OF VALVES
Machine-grind intake valves as follows:
Seating face angle
44.5°
Edge width, new valve
1.5 mm (0.059 in)
Min. edge width after grinding 1.2 mm (0.047 in)
CAUTION: Exhaust valves are stellite-coated and must be ground only with grinding paste.
Check valve stem height
Use gauge 5222 and sliding callipers.
Place camshaft carrier on cylinder head.
Place gauge across camshaft bearing seats.
Measure valve stem height by inserting callipers through hole in gauge.
Valve stem height: 49.4 ± 0.4 mm (1.9449 ± 0.0157 in)
Max. machining allowance: 0.4 mm (0.0157 in)
Length, new valve:
Intake
122.45 ± 0.2 mm (4.8209 ± 0.0079 in)
Exhaust
122.25 ± 0.2 mm (4.8130 ± 0.0079 in)
NOTE: Correct valve stem height is essential to satisfactory operation of hydraulic tappets.