Reassembly - Mitsubishi S4Q User Manual

CYLINDER HEADS AND VALVE
MECHANISM
Round bar
(6 mm [0.24 in.] diameter)
Combustion
jet
Figure 34 Removing combustion jet
Combustion
jet
Orifice
Center of
cylinder
Figure 35 Installing combustion jet
Stem seal
installer
Figure 36 Installing valve stem seal
32 / 174
15°
Stem seal
Valve guide
Valve
ENGLISH
ENGINE MAIN PARTS
7.2.5 Replacing combustion jets
Replace the combustion jets when they are cracked or
otherwise faulty.
1) To remove the combustion jet, tap the jet off
the cylinder head with a 6 mm [0.24 in.]
diameter round bar inserted through the glow
plug hole, as shown in the illustration.
2) To install a replacement jet, position the jet so
that the orifice is toward the center of the
cylinder and drive it into position with a plastic
hammer.
7.3

Reassembly

1. Installing valve stem seal
1) Apply engine oil to the valve stem and put the
valve in the valve guide.
2) Put a new stem seal on the valve guide.
3) Using stem seal installer (32A91
install the stem seal to the valve guide,
making use of the valve stem as a guide.
Service Manual Mitsubishi SQ-Series diesel engines
00200),
–
Version 08/2004