69J3D11 5-36123456789NOTE:• Turn the valve guide reamer clockwise toream the valve guide.• Do not turn the reamer counterclockwisewhen removing the reamer.4. Measure the valve guide inside diameter.Replace the valve guide if out of specifi-cation.Checking the valve seat1. Eliminate carbon deposits from the valvewith a scraper.2. Apply a thin, even layer of Mechanic’sblueing dye (Dykem) onto the valve seat.3. Lap the valve slowly on the valve seatwith a valve lapper (commercially obtain-able) as shown.4. Measure the valve seat contact width awhere the blueing dye is adhered to thevalve face. Reface the valve seat if thevalve is not seated properly or if the valveseat contact width is out of specification.Replace the valve guide if the valve seatcontact is uneven.Refacing the valve seat1. Reface the valve seat with the valve seatcutter.Valve guide reamer: 90890-06804Valve guide inside diameter:5.51–5.52 mm (0.2169–0.2173 in)Valve seat contact width a:Intake:1.1–1.4 mm (0.043–0.055 in)Exhaust:1.4–1.7 mm (0.055–0.067 in)ÉCylinder head
