Impreza RS Coupe AWD F4-2.5L SOHC (1999)
2. Insert ST2 into valve guide and press it down to remove valve guide.
ST1 498267800 CYLINDER HEAD TABLE
ST2 499767400 VALVE GUIDE REMOVER
3. Turn cylinder head upside down and place ST as shown in the figure.
Intake side: ST 499767700 VALVE GUIDE ADJUSTER
Exhaust side: ST 499767800 VALVE GUIDE ADJUSTER
4. Before installing new oversize valve guide, make sure that neither scratches nor damages exist on the inside surface of the valve guide
holes in cylinder head.
5. Put new valve guide, coated with sufficient oil, in cylinder, and insert ST1 into valve guide. Press in until the valve guide upper end is flush
with the upper surface of ST2.
ST1 499767400 VALVE GUIDE REMOVER
Intake side: ST2 499767700 VALVE GUIDE ADJUSTER
Exhaust side: ST2 499767800 VALVE GUIDE ADJUSTER
6. Check the valve guide protrusion.
Valve guide protrusion: L
Intake: 20.0 - 20.5 mm (0.787 - 0.807 inch)
Exhaust: 16.5 - 17.0 mm (0.650 - 0.669 inch)
