Accent GT Coupe L4-1495cc 1.5L DOHC MFI (1997)
Valve Seat: Service and Repair
Replacement
REMOVAL
1. Any valve seat insert that has been worn over the service limit should be removed at normal temperature after cutting away most of the insert wall,
using valve seat cutters, as shown in illustration.
2. After removing the seat insert, machine the seat insert bore using a reamer or a cutter.
3. Cut to the size shown below.
INTAKE VALVE:
1st O.S. (marked 30): 0.30 mm (0.0120 inch)
Insert height: 5.100-5.300 mm (0.2010-0.2090 inch)
Insert diameter: 29.800-29.821 mm (1.1730-1.1740 inch)
2nd O.S. (marked 60): 0.60 mm (0.0240 inch)
Insert height: 5.400-5.600 mm (0.2130-0.2200 inch)
Insert diameter: 30.100-30.121 mm (1.1850-1.1860 inch)
EXHAUST VALVE:
1st O.S. (marked 30): 0.30 mm (0.0120 inch)
Insert height: 5.900-6.100 mm (0.2320-0.2400 inch)
Insert diameter: 27.300-27.321 mm (1.0740-1.0750 inch)
2nd O.S. (marked 60): 0.60 mm (0.0240 inch)
Insert height: 6.200-6.400 mm (0.2440-0.2520 inch)
Insert diameter: 27.600-34.621 mm (1.0860-1.0870 inch)
INSTALLATION
Heat the cylinder head to about 250°C (480°F) and press in the oversize seat insert.
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The oversize seat insert should be at normal room temperature for installation.
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After installing a new valve seat insert, resurface the valve seat.