740 L4-2320cc 2.3L DOHC B234F (Can) (1992)
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Check valve seat recess
If damaged, recess must be machined for oversized valve seat.
Measure seat recess diameter
Use internal micrometer.
Measure diameter all around circumference.
Seat should be 0.10-0.14 mm (0.0039-0.0055 in) larger than recess in cylinder head.
If interference fit is less than above, recess must be milled out to take oversized seat.
Heat cylinder head
Heat head in oven at approx. 100°C (212°F).
NOTE: Use heavy protective gloves when handling hot cylinder head.
Cool valve seat
Place seat on appropriate drift:
Intake 5368
Exhaust 5369
Cool seat using dry ice or similar medium. Use grease to hold seat to drift 5369.