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GENERAL -Precautions Before ServiceGENERAL -Precautions Before Service00-20
MUT-II
Refer to the “MUT-IIREFERENCE MANUAL” or “MUT-II
OPERATING INSTRUCTIONS” for instructions on handling
the MUT-II.
Connect the MUT-IIto the diagnosis connector as shown
in the illustration.
Caution
Turn the ignition switch to the LOCK (OFF) position before
connecting or disconnecting the MUT-II.
IN ORDER TO PREVENT VEHICLES FROM FIRE
“Improper installation of electrical or fuel related parts could cause a fire. In order to retain the high
quality and safety of the vehicle, it is important that any accessories that may be fitted or modifications/repairs
that may be carried out which involve the electrical or fuel systems, MUST be carried out in accordance
with MMC’s information/Instructions”.
ENGINE OILS
Health Warning
Prolonged and repeated contact with mineral oil will result in the removal of natural fats from the skin,
leading to dryness, irritation and dermatitis. In addition, used engine oil contains potentially harmful
contaminants which may cause skin cancer. Adequate means of skin protection and washing facilities
must be provided.
Recommended Precautions
The most effective precaution is to adapt working practices which prevent, as far as practicable, the
risk of skin contact with mineral oils, for example by using enclosed systems for handling used engine
oil and by degreasing components, where practicable, before handling them.
Other precautions:
DAvoid prolonged and repeated contact with oils, particularly used engine oils.
DWear protective clothing, including impervious gloves where practicable.
DAvoid contaminating clothes, particularly underpants, with oil.
DDo not put oily rags in pockets, the use of overalls without pockets will avoid this.
DDo not wear heavily soiled clothing and oil-impregnated foot-wear. Overalls must be cleaned regularly
and kept separately from personal clothing.
DWhere there is a risk of eye contact, eye protection should be worn, for example, chemical goggles
or face shields; in addition an eye wash facility should be provided.
DObtain First Aid treatment immediately for open cuts and wounds.
DWash regularly with soap and water to ensure all oil is removed, especially before meals (skin cleansers
and nail brushes will help). After cleaning, the application of preparations containing lanolin to replace
the natural skin oils is advised.
DDo not use petrol, kerosine, diesel fuel, gas oil, thinners or solvents for cleaning skin.
DUse barrier creams, applying them before each work period, to help the removal of oil from the skin
after work.
DIf skin disorders develop, obtain medical advice without delay.
MUT-II
sub-assembly
ROM pack
MUT-˜
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ENGINE 11A........................................................
ENGINE OVERHAUL 11B............................................
11A-1
ENGINE
CONTENTS
Page 408 of 1449
11A-2
ENGINE
CONTENTS
GENERAL INFORMATION 3..................
SERVICE SPECIFICATIONS 4.................
SEALANTS 4................................
SPECIAL TOOLS 5...........................
ON-VEHICLE SERVICE 7.....................
Drive Belt Tension Check 7.....................
Auto-tensioner Check 7.........................
Ignition Timing Check 9.........................
Idle Speed Check 9............................
Idle Mixture Check 10..........................
Compression Pressure Check 11................Manifold Vacuum Check 12.....................
Lash Adjuster Check 12........................
CRANKSHAFT PULLEY 15....................
CAMSHAFT AND CAMSHAFT OIL
SEAL 16.....................................
OIL PAN 23..................................
CRANKSHAFT OIL SEAL 26..................
CYLINDER HEAD GASKET 28................
TIMING BELT AND TIMING BELT B 34.......
ENGINE ASSEMBLY 43.......................
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ENGINE <4G6> -General Information11A-3
GENERAL INFORMATION
Items4G63
Total displacement mL1,997
Bore×Stroke mm85.0×88.0
Compression ratio8.8
Combustion chamberPentroof type
Camshaft arrangementDOHC
Number of valveIntake8
Exhaust8
Valve timingIntakeOpeningBTDC 21_
ClosingABDC 59_
ExhaustOpeningBBDC 58_
ClosingATDC 18_
Fuel systemElectronically controlled multipoint fuel injection
Rocker armRoller type
Auto-lash adjusterEquipped
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ENGINE -Service Specifications/Sealants11A-4
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
Drive belt tensionVibration frequency Hz (Reference)110 - 144-
Tension N (Reference)245 - 412-
Basic ignition timing5_BTDC±3_-
Ignition timingApproximetely
5_BTDC-
Idle speed r/min850±100-
CO contents %0.1 or less-
HC contents ppm100 or less-
Compression pressure (250 - 400 r/min) kPa1,128951
Compression pressure difference of all cylinder kPa-Max. 98
Intake manifold vacuum kPa-Min. 60
Cylinder head bolt shank length mm-99.4
Timing belt B tension
(Whenchecked)
Vibration frequency Hz52 - 92-
(When checked)Deflection mm (Reference)5-10-
Timing belt B tension
(Whenadjusted)
Vibration frequency Hz76 - 92-
(When adjusted)Deflection mm (Reference)5-7-
Timing belt B tension
(Whenreplaced)
Vibration frequency Hz76 - 92-
(When replaced)Deflection mm (Reference)5-7-
Auto-tensioner rod protrusion amount mm3.8 - 4.5-
Auto-tensioner rod sink in amount mmWithin 1-
SEALANTS
ItemsSpecified SealantsRemarks
Rocker coverMITSUBISHI GENUINE PART MD970389 or
equivalent
Semi-drying
sealant
Rocker cover gasket
equivalentsealant
Cylinder head
Camshaft position sensor support
Oil pan
Camshaft end seal3M ATD Part No. 8660 or equivalent
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ENGINE -Special Tools11A-5
SPECIAL TOOLS
ToolNumberNameUse
MB991502MUT-IIsub
assemblyDMeasuring the drive belt tension
DChecking the ignition timing
DChecking the idle speed
DErasing diagnosis code
DMeasuring the timing belt B tension
MB991668Belt tension meter
setDMeasuring the drive belt tension
(used together with MUT-II)
DMeasuring the timing belt B tension
(used together with MUT-II)
MD998727Oil pan removerFor removing the oil pan
MD998781Flywheel stopperFor fixing the flywheel
MD998776Crankshaft
rear oil seal
installerFor pressfitting the crankshaft rear oil seal
MB990938Installer bar
MD998285Crankshaft
front oil seal
guideFor pressfitting the crankshaft front oil seal
MD998382Crankshaft
front oil seal
installer
MB991654Cylinder head bolt
wrenchFor removal and installation of cylinder head
bolts
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ENGINE -Special Tools11A-6
Tool UseName Number
MB991367Special spannerFor retaining the crankshaft sprocket
MB991385Pin
MB991704Battery harnessMeasuring the timing belt B tension
(used together with MUT-II)
MD998767Tensioner pulley
socket wrenchFor adjusting timing belt tension
MD998738Adjusting boltFor retaining the tensioner arm and the
auto-tensioner
MB991453Engine hanger
attachment
setSupporting the engine assembly during
removal and installation of the transmission
GENERAL
SERVICE
TOOL
MZ203827Engine lifter
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ENGINE -On-vehicle Service11A-7
ON-VEHICLE SERVICE
DRIVE BELT TENSION CHECK
1. Check that the indicator marking of the auto-tensioner
is within the range as shown in the illustration A of the
tensioner bracket.
Caution
Inspection must be carried out after turning the
crankshaft clockwise for more than once.
2. If the marking is outside the range as shown in the
illustration A, replace the drive belt.
NOTE
Due to the adoption of the auto-tensioner, no adjustment
for belt tension is required.
AUTO-TENSIONER CHECK
1. Check that the driver belt stays within the width of the
pulley of the auto-tensioner after turning off the engine
at idle.
2. Remove the drive belt.(Refer to P.11C-15.)
3. Use the 12.7sq. spinner handle and etc. to check that
the auto-tensioner is not stuck by turning it in both
directions.
4. If there is any abnormality in the above - mentioned 1
or 3, replace the auto-tensioner.
5. Install the drive belt.(Refer to P.11C-15.)
To determine whether the auto-tensioner is acceptable can
be done by checking the drive belt tension.
1. Use the following procedure to check the drive belt tension.
(1) Connect the special tool (MB991668) to the MUT-II.
(2) Connect the MUT-IIto the diagnosis connector.
Caution
Connection and disconnection of the MUT-IImust
be carried out after turning the ignition switch
to the “LOCK” (OFF) position.
(3) Turn the ignition switch to the “ON” position and select
“Belt Tension Measurement” from the menu screen.
Indicator
marking
A