ENGINE
3TNV88F Service Manual
6-21
Cylinder Head
Note: If the valves are to be reused, identify
them so they can be installed in their
original location.
8. Turn the cylinder head so the exhaust port side
faces down. Remove the intake and exhaust
valves
(Figure 6-12, (6))
from the cylinder
head.
9. Remove the valve stem seals
.
■
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 6-23.
1. If the valve guides were not within
specifications, use a drift pin and hammer to
drive the valve guides
out of
the cylinder head.
Figure 6-13
Cleaning of Cylinder Head
Components
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.
Thoroughly clean all components using a non-
metallic brush and an appropriate solvent. Each
part must be free of carbon, metal filings and other
debris.
Inspection of Cylinder Head
Components
Visually inspect the parts. Replace any parts that
are obviously discolored, heavily pitted or otherwise
damaged. Discard any parts that do not meet its
specified limit.
NOTICE
Any part which is found defective as a result of
inspection or any part whose measured value does
not satisfy the standard or limit must be replaced.
NOTICE
Any part determined to not meet the service
standard or limit before the next service, as
determined from the state of current rate of wear,
should be replaced even though the part currently
meets the service standard limit.
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3TNV88F_SVM_A4.book 21 ページ 2012年7月26日 木曜日 午後6時4分