3) flatness
Measure flatness of the intake/exhaust
manifolds fitting surfaces on the cylinder
head using a straight edge and a feeler
gauge.
4) Hydraulic test
Hydraulic test method for the cylinder
head is same as that for cylinder block.
9.2.3. Valve and valve guide
1) Valve
Clean the valves with clean diesel oil,
then inspect them as follows:
•
Valve stem outer diameter
Measure the valve stem outer diameter
at 3 positions. (top, middle, and bottom)
If the amount of wear is beyond the limit,
replace the valve.
•
Valve seat contacting faces
Check the valve seat contacting faces for
scratches or wear, and correct the faces
with grinding paper as necessary.
Replace if severely damaged.
- 74 -
Standard Limit
0.05 mm 0.2 mm
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