Valve Seat Check - Mazda 626 MX-6 Workshop Manual

INSPECTION AND REPAIR
2. Remove the valve guide from the side opposite the
combustion chamber with the SST.
86U01X-084
Installation
1. Gradually heat the cylinder head in water to ap­
prox. 90°C (190°F).
2. Tap the valve guide in from the side opposite the
combustion chamber with the SST until the pro­
trusion height is as specified.
86U01X-085
Valve Seat
1. Inspect the contact surface of the valve seat and
valve face for the following.
(1) Roughness
(2) Damage
2. If necessary, resurface the valve seat with a 45°
valve seat cutter and/or resurface the valve face.
86U01X-087
3. Apply a thin coat of prussian blue to the valve face.
4. Check the valve seating by rotating 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.
626, MX-6 Revised 10/87
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