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02-10
2) Cylinder Head
(1) Cylinder head mating surface check
▶
Specified value
Minimum height after machining
Flatness
Parallel deviation of cylinder head
Peak-to valley of surface
valve recess "a"
(2) Cylinder head pressure Leak test
Immerse the cylinder head with the pressure plate into warm water (approx. 60°C) and pressurize
with compressed air to 2 bar.
Total height "A"
Longitudinal direction
Transverse direction
Intake valve
Exhaust valve
142.9 to 143.1 mm
142.4 mm
0.08 mm
below 0.1 mm
0.004 mm
0.1 to 0.7 mm
0.1 to 0.7 mm
1.
Measure the cylinder head height "A".
-
If the height is less than the limit, the
cylinder head must be replaced.
2.
Insert the valves into the valve guides and
measure the recesses.
Valve recess "a
-
If the measured value is out of the
specified range, machine the valve seat
as much as necessary until the specified
value is achieved.
0.0 mm
0.1 to 0.7 mm
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Troubleshooting
