Doosan DX60R Shop Manual page 295

Valve Stem Bend
Place the valve stem on a flat inspection block or layout bed.
Roll the valve until a gap can be observed between a portion of
the valve stem and the surface of the block or bed. Use a feeler
gauge to measure the gap (Figure 140). See "Intake / Exhaust
Valve and Guide" on page -95 for the service limit.
Valve Recession
NOTE: The valve guides must be installed to perform this
check.
Insert the valves into their original locations and press them
down until they are fully seated. Use a depth micrometer
(Figure 141) to measure the difference between the cylinder
head gasket surface and the combustion surface of each
exhaust and intake valve (Figure 142). See "Cylinder Head" on
page -95 for the service limit.
NOTE:
2-Valve cylinder head is shown. 4-Valve cylinder
head is similar.
Engine
Figure 140
Figure 141
Figure 142
SP001693
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