Mazda 323 1988 Workshop Manual page 59

IA
INSPECTION AND REPAIR
4. Check that the protusion height (dimension A in
the figure) is within specification.
Height:
13.2-13.8 mm (0.520-0.543 in)
Note
Although the shapes of the intake and exhaust
valve guides are different, use the exhaust
valve guide on both sides as a replacement.
Valve Seat
1. Inspect the contact surface of the valve seat and
valve face.
(1) Rouahness
(2) Damage
2. If necessary, resurface the valve seat using a 45O
valve seat cutter and/or resurface the valve face.
3. Apply a thin coat of prussian blue to the valve face.
4. Check the valve seating by pressing the valve
against the seat.
(1) If blue does not appear 360° around the valve
face, replace the valve.
(2) If blue does not appear 360° around the valve
seat, resurface the seat.