SHOP MANUAL MT26-31 - 06.2005
Engine
Tier-3 710655-
Ch 1 page 140
Intake valve
Valve head angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.5
Minimum dimension A for ground valve . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 2.6 mm
Distance between the surface of the cylinder head and the valve head . 0.75-1.8 mm
Exhaust valve
Valve head angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44.5
Minimum dimension A for ground valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 mm
Distance between the surface of the cylinder head and the valve head . 0.66-1.8 mm
- Check dimension A for each valve.
- Grind the valves in a valve grinding machine
Intake valve seat
Seat angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20.0°-20.5°
Width of contact surface A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9 - 2.6 mm
Valve seat insert, outer diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46.054 - 46.065 mm
Seat for valve seat insert, diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46.000 - 46.016 mm
Seat for valve seat insert, depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.25 - 11.35 mm
Oversized valve seat insert:
Outer diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46.254 - 46.265 mm
Seat for valve seat insert, diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46.200 - 46.216 mm
Cooling temperature when fitting valve seat insert . . . . . . . . . . . . . . . . . . approx. -80°C
Minimum dimension A for ground
valve
Cylinder head
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