Yanmar 3TNV82A, Service Manual, Page: 187 / 394

ENGINE
TNV DI Service Manual 6-55
4-Valve Cylinder Head
3. Remove the valve keepers (Figure 6-49, (1)).
4. Slowly release the tension on the valve spring.
5. Remove the spring retainer (Figure 6-49, (2)),
valve spring (Figure 6-49, (3)).
Figure 6-49
6. Repeat the procedure with all the remaining
valves.
Note: If the valves are to be reused, identify
them so they can be installed in their
original location.
7. Remove the injector nozzle protectors
(Figure 6-49, (6)) and the seats
(Figure 6-49, (7)).
8. Turn the cylinder head so the exhaust port side
faces down. Remove the intake and exhaust
valves (Figure 6-49, (5)) from the cylinder
head.
9. Remove the valve stem seals
(Figure 6-49, (4)).
Removal of Valve Guides
Note: Removal of the valve guides should be
postponed until inspection and
measurement procedures have been
performed. See Inspection of Valve
Guides on page 6-57.
1. Using a drift pin and hammer, drive the valve
guides (Figure 6-50, (1)) out of the cylinder
head.
Figure 6-50
Cleaning of Cylinder Head
Components
0001867
(1)
(5)
(3)
(4)
(7)
(6)
(2)
A
WARNING
FUME / BURN HAZARD!
• Always read and follow safety related
precautions found on containers of
hazardous substances like parts
cleaners, primers, sealants and
sealant removers.
• Failure to comply could result in death
or serious injury.
0000014en
0001868
(1)
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