Mitsubishi 380. Manual — part 315
MAINTENANCE SERVICE
GENERAL
00-38
5. SPARK PLUGS (REPLACE)
M1001002000346
CAUTION
Iridium plugs are used. Use care not to damage the iridium
tips of the plugs. Do not adjust the spark plug gap.
1. Spark plugs must spark properly to assure proper engine
performance and reduce exhaust emission level. Therefore,
they should be replaced periodically with new ones( Refer to
Maintainence Schedule).
Spark plug type
2. The new plugs should be checked for the proper gap.
Spark plug gap: 1.0
− 1.1 mm
3. Install the spark plugs and tighten to 25
± 5 N⋅m (18 ± 4
ft-lb).
6. TIMING BELT (REPLACE)
M1001002300273
Replace the belt with a new one according to the vehicle main-
tenance schedule to assure proper engine performance.
<3.8L ENGINE>
For removal and installation procedures, refer to GROUP 11C,
Engine Mechanical <3.8L Engine>
− Timing Belt − Removal
and Installation
.
MAKER
3.8L ENGINE
BOSCH
FR8DI30
AKX00383
AKX00383
IRIDIUM TIP
AK
MAINTENANCE SERVICE
GENERAL
00-39
7. DRIVE BELTS (FOR ALTERNATOR, POWER
STEERING PUMP AND AIR CONDITIONING)
(CHECK)
M1001008700031
ALTERNATOR DRIVE BELT TENSION CHECK
<3.8L ENGINE>
.
WHEN USING DIAGNOSTIC TOOL (MUT-III)
Required Special Tools:
• MB991668: Belt Tension Meter Set
• Diagnostic Tool (MUT-III)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991910: MUT-III Main Harness A (BLUE)
CAUTION
To prevent damage to DIAGNOSTIC TOOL (MUT-III), always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting.
1. Connect Belt Tension Meter Set (MB991668) to V.C.I
(MB991824).
2. Connect MUT-III Main Harness A (BLUE) (MB991910) to
V.C.I (MB991824).
3. Connect MUT-III Main Harness A (BLUE) (MB991910) to the
data link connector.
4. Turn the ignition switch to the "ON" position and select "Belt
Tension" from the menu V.C.I (MB991824) screen.
AC302077
AC305412
01DB039A
MB991824
MB991910
MB991668
DATA LINK
CONNECTOR
MAINTENANCE SERVICE
GENERAL
00-40
CAUTION
• The temperature of the surface of the belt should be as
close as possible to underhood temperature.
• Do not let any contaminants such as water or oil get
onto the microphone.
• If strong gusts of wind blow against the microphone or
if there are any loud sources of noise nearby, the val-
ues measured by the microphone may not correspond
to actual values.
• If the microphone is touching the belt while the mea-
surement is being made, the values measured by the
microphone may not correspond to actual values.
• Do not take the measurement while the vehicle's engine
is running.
5. Hold special tool MB991668 (microphone) to the middle of
the drive belt between the pulleys (at the place indicated by
the arrow), about 10
− 20 mm (0.4 − 0.8 inch) away from the
rear surface of the belt and so that it is perpendicular to the
belt (within an angle of
± 15 degree angle).
6. Gently tap the middle of the belt between the pulleys (the
place indicated by the arrow) with your finger as shown in
the illustration, and check that the vibration frequency of the
belt is within the standard value.
Standard value:
NOTE: Because the frequency depends on the belt material,
confirm Part No. shown on the reverse of the belt.
.
Part No.
Vibration frequency Hz
MD368275
133
− 158
MN158101, MN187016
143
− 169
00DB081A
15° 15°
MB991668
(MICROPHONE)
10 – 20mm
(0.4 – 0.8in)
AIR
CONDITIONING
COMPRESSOR
PULLEY
ALTERNATOR
PULLEY
TENSIONER
PULLEY
CRANK
SHAFT
PULLEY
TAP LIGHTLY
WITH A FINGER
MAINTENANCE SERVICE
GENERAL
00-41
WHEN USING THE TENSION GAUGE
Use a belt tension gauge to check that the belt tension is within
the standard value.
Standard value: 490
− 686 N (110 − 154 lb)
.
BELT DEFLECTION CHECK
Apply approximately 98 N (22 lb) of force to the middle of the
drive belt between the pulleys (at the place indicated by the
arrow) and check that the amount of deflection in within the
standard value.
Standard value: 8.4
− 10.7 mm (0.33 − 0.42 in)
00DB082A
TENSION
GAUGE
AIR
CONDITIONING
COMPRESSOR
PULLEY
ALTERNATOR
PULLEY
TENSIONER
PULLEY
CRANK
SHAFT
PULLEY
00DB083A
AIR
CONDITIONING
COMPRESSOR
PULLEY
ALTERNATOR
PULLEY
TENSIONER
PULLEY
CRANK
SHAFT
PULLEY
APPROXIMATELY
98 N (22 lb)
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