Mitsubishi S4Q User Manual

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Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004
ENGLISH
CYLINDER HEADS AND VALVE
MECHANISM 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
–00200),
install the stem seal to the valve guide,
making use of the valve stem as a guide.
Figure 34 Removing combustion jet
Round bar
(6 mm [0.24 in.] diameter)
Combustion
jet
Figure 35 Installing combustion jet
Figure 36 Installing valve stem seal
Combustion
jet
Center of
cylinder
Orifice
15°
Stem seal
installer
Stem seal
Valve guide
Valve

Mitsubishi S4Q Specifications

General

Brand	Mitsubishi
Model	S4Q
Category	Engine
Language	English