Mitsubishi S4Q User Manual page 28

CYLINDER HEADS AND VALVE
MECHANISM
Valve guide remover
Figure 23 Replacing valve guide
Press
Figure 24 Installing valve guide
Valve lapper
Figure 25 Inspecting valve face
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Valve
guide
Valve guide installer
Valve guide
Red lead
ENGLISH
ENGINE MAIN PARTS
3. Replacing valve guide
1) To remove the valve guide for replacement,
use valve guide remover (32A91-00300).
2) To install a replacement valve guide, use valve
guide installer (32A91-00100) and a press.
CAUTION
The height to top of valve guide is specified; be sure
to use the valve guide installer to insure the correct
height.
3) Insert a new valve into the guide just installed
to check how the valve slides in the guide.
4) After replacing the valve guides, check the
valve contact with the seats.
4. Inspecting valve face
Coat the valve face lightly with red lead. Use the
Valve lapper to inspect the valve contacts with its
seat. If the contact is not uniform, or if the valve is
defective or if the service limit is exceeded, repair
or replace the valve and valve seat.
Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004