3) Flatness
Measure the flatness of the intake and exhaust manifold face mounted on the cylinder head
using a straight edge and a feeler gauge.
4) Hydraulic test
Hydraulic test for the cylinder head is same as that for cylinder block.
6.2.3. Valve & 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 face for scratch or wear, and correct the faces with fine
grinding paper as necessary. Replace if severely damaged.
•
Valve head thickness
Measure the valve head thickness, and
replace the valve if the measured value
is beyond the limit.
- 65 -
Standard Limit
0.05 mm 0.2 mm
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