2) Inspection and Measurement of valve
and valve guide
a) Valve
•
After cleaning the valves with clean
diesel oil, measure the valve stem’s
outside diameter at upper, middle,
and lower to determine the wears
and when the wear limit is more than
0.15mm, replace the valves.
•
Inspect the scratch and wear of valve
stem seal contacting face, and if
necessary correct with the grinding
paper but if severe replace it.
•
If valve head thickness (H) becomes
less than 1.6mm for intake and
1.3mm for exhaust, replace the
valve.
b) Valve guide
•
Insert the valve into valve guide and
measure the clearance between
valve and valve guide by the shaking
degree of valve. If the clearance is
bigger, measure the valve and then
replace the more worn valve guide.
- 78 -
EFM2036I
Stem tip
Valve
Standard
Limit
Intake
11.969 ~ 11.980 mm
12.130 mm
Exhaust
11.944 ~ 11.955 mm
12.105 mm
EFM2037I
H
Valve
Standard
Limit
Intake
2.6 ~ 3.0 mm
1.6 mm
Exhaust
1.9 ~ 2.3 mm
1.3 mm
Measuring
position
EA0M4052
