240 L4-2127cc 2.1L SOHC B21A (Can) (1984)
Heating Cylinder Head
9. Heat cylinder head to 100°C (212°F).
10. Install new valve seat on drift:
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Use drift 5029 for intake valve seat and drift 5220 for exhaust valve seat.
Cooling Valve Seat
11. Cool seat to -7O°C (-94°F)
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Use carbon dioxide or similar agent.
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Wear protective gloves for safety.