Mitsubishi Galant (2004+). Manual - part 156

CAMSHAFT AND VALVE STEM SEAL

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ENGINE MECHANICAL <3.8L ENGINE>

11C-31

<<D>> VALVE SPRING RETAINER LOCK REMOVAL

CAUTION

When removing valve spring retainer locks, leave the pis-
ton of each cylinder in the TDC (Top Dead Center) position. 
The valve may fall into the cylinder if the piston is not 
properly in the TDC position.
Use special tool MD998772 to compress the valve spring, and 
remove the valve spring retainer locks.

NOTE: Installation position of valve spring compressor special 
tool (MD998772) is different between exhaust side and intake 
side.

AC205277

MD998772

AB

<LEFT BANK>

AC205278

MD998772

AB

<RIGHT BANK>

AC204067AC

INSTALLATION POSITION

EXHAUST SIDE

INTAKE SIDE

RIGHTBANK

LEFTBANK

FRONT

EXHAUST SIDE

CAMSHAFT AND VALVE STEM SEAL

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ENGINE MECHANICAL <3.8L ENGINE>

11C-32

INSTALLATION SERVICE POINTS

.

>>A<< VALVE STEM SEAL INSTALLATION
1. Apply a small amount of engine oil to the valve stem seal.

CAUTION

• Valve stem seals cannot be reused.
• Special tool MD998774 must be used to install the valve 

stem seal. Improper installation could result in oil leak-
ing past the valve guide.

2. Use special tool MD998774 to fill a new valve stem seal in 

the valve guide using the valve stem area as a guide.

.

>>B<< VALVE SPRING INSTALLATION
Install the valve spring with its identification color painted end 
facing the locker arm.

.

AC308654AB

MD998774

VALVE

VALVE 
STEM 
SEAL

VALVE 
GUIDE

AC107415

AB

ROCKER ARM SIDE

IDENTIFICATION
COLOR

CAMSHAFT AND VALVE STEM SEAL

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ENGINE MECHANICAL <3.8L ENGINE>

11C-33

>>C<< VALVE SPRING RETAINER LOCK INSTALLATION
Use special tool MD998772 to compress the valve spring in the 
same manner as removal.

.

>>D<< ROCKER ARM AND SHAFT ASSEMBLY 
INSTALLATION
1. Install the rocker arm, shaft and lash adjuster assembly.
2. Tighten the mounting bolts to the specified torque.

Tightening torque: 31 

± 3 N⋅m (23 ± 2 ft-lb)

3. Remove special tool MD998443.

AC205277

MD998772

AB

<LEFT BANK>

AC205278

MD998772

AB

<RIGHT BANK>

AC205280

MD998443

AB

CAMSHAFT AND VALVE STEM SEAL

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ENGINE MECHANICAL <3.8L ENGINE>

11C-34

4. Check that notches in the each rocker shaft are facing the 

direction shown in the illustration.

.

>>E<< CAMSHAFT OIL SEAL INSTALLATION
1. Apply engine oil to the camshaft oil seal lip.
2. Use special tools MD998713 and MB991559 to press-fit the 

camshaft oil seal.

.

AC204149

AC

NOTCH

NOTCH

FRONT

NOTCH

NOTCH

<RIGHTBANK>

<LEFTBANK>

ACX00371AB

MB991559

MD998713

<LEFT BANK>

ACX00372 AB

MD998713

<RIGHT BANK>