Scania DC11 - Machining the Cylinder Head

01:03-02
©
Scania CV AB 2011, Sweden
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Machining the cylinder head
Valve seat insert, machining measurement
Intake valve
A = 1.9 - 2.6 mm
B = 0.75 - 1.8 mm
C= diameter, 39.8+/-0.5 mm (setting dimension
for machining tool)
C
112 266
Exhaust valve
A = 1.8 - 2.6 mm
B = 0.66 - 1.8 mm
C= diameter, 37.9+/-0.5 mm (setting dimension
for machining tool)
C
112 267
Specifications
When machining the cylinder head, it must not be below 124.4 mm.
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
Valve seat insert position, diameter 46.000 - 46.016 mm
Valve seat insert position, depth 11.25 - 11.35 mm
Distance B between the cylinder head face and the valve disc 0.75 - 1.8 mm
Oversize valve seat insert:
External diameter 46.254 - 46.265 mm
Valve seat insert position, diameter 46.200 - 46.216 mm
Cooling temperature when fitting valve seat insert approx. -80°C
Cylinder head
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