Mitsubishi Galant. Manual — part 21
GENERAL DESCRIPTION
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ENGINE MECHANICAL <2.4L>
11A-3
.
G EN ER A L DESC RIPTIO N
M1111000100152
The 4G64 (2.4L) engine is an in-line four cylinder engine. The cylinder numbers are assigned as 1-2-3-4 from
the front of the engine (timing belt side). This engine is fired in the order of the 1, 3, 4 and 2 cylinders.
EN G IN E D IA G N O SIS
M1111000700110
ITEMS
SPECIFICATIONS
Type
In-line SOHC
Number of cylinders
4
Bore mm (in)
86.5 (3.41)
Stroke mm (in)
100.0 (3.94)
Piston displacement cm
3
(cu in)
2,351 (143.4)
Compression ratio
9.0
Firing order
1-3-4-2
Counterbalance shaft
Equipped
Valve timing
Intake valve
Opens (BTDC)
16
°
Closes (ABDC)
53
°
Exhaust valve
Opens (BBDC)
50
°
Closes (ATDC)
16
°
Lubrication
Pressure feed-full flow filtration
Oil pump type
Involute gear type
SYMPTOMS
PROBABLE CAUSE
REMEDY
Compression is too
low
Blown cylinder head gasket
Replace the gasket
Worn or damaged piston rings
Replace the rings
Worn piston or cylinder
Repair or replace the piston and/or the
cylinder block
Worn or damaged valve seat
Repair or replace the valve and/or the
seat ring
Drop in oil pressure
Engine oil level is too low
Check the engine oil level
Malfunction of oil pressure switch
Replace the oil pressure switch
Clogged oil filter
Install a new filter
Worn oil pump gears or cover
Replace the gears and/or the cover
Thin or diluted engine oil
Change the engine oil to correct viscosity
Stuck (opened) oil relief valve
Repair the relief valve
Excessive bearing clearance
Replace the bearings
Oil pressure too high
Stuck (closed) oil relief valve
Repair the relief valve
SPECIAL TOOLS
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ENGINE MECHANICAL <2.4L>
11A-4
SPECIA L TO O LS
M1111000600113
Noisy valves
Malfunction of lash adjuster (including
entry of air into high pressure chamber)
Check the lash adjuster
Thin or diluted engine oil (low oil
pressure)
Change the engine oil
Worn or damaged valve stem or valve
guide
Replace the valve and/or the guide
Connecting rod noise/
main bearing noise
Insufficient oil supply
Check the engine oil level
Thin or diluted engine oil
Change the engine oil
Excessive bearing clearance
Replace the bearings
SYMPTOMS
PROBABLE CAUSE
REMEDY
TOOL
TOOL NUMBER AND
NAME
SUPERSESSION
APPLICATION
MB991502
Scan tool (MUT-II)
MB991496-OD
•
Ignition timing check
•
Idle speed check
MB991453
Engine hanger assembly
MZ203827-01
Supporting the engine
assembly during remove
and installation of the
transaxle
GENERAL SERVICE
TOOL
MZ203827
Engine lifter
MZ203827-01
MB990767
End yoke holder
MB990767-01
Holding the camshaft
sprocket when loosening
and tightening bolt
MD998719
Crankshaft pulley holder
pin
MT308239
B991502
MB991453
MZ203827
MB990767
MD998719
SPECIAL TOOLS
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ENGINE MECHANICAL <2.4L>
11A-5
MD998443
Lash adjuster holder (8)
MD998443-01
Supporting of the auto-lash
adjuster to prevent it from
falling when rocker shaft
assembly is removed or
installed
MD998713
Camshaft oil seal installer
MD998713-01
Camshaft oil seal
installation
MD998727
Oil pan remover
MD998727-01
Oil pan removal
MB991367
Special spanner
MB991367-01
Holding the crankshaft
sprocket
MD998375
Crankshaft oil seal
installer
MD998375-01
Crankshaft front oil seal
installation
MD998781
Flywheel stopper
General service tool
Drive plate supporting
MD998776
Crankshaft rear oil seal
installer
MD998776-01
Crankshaft rear oil seal
installation
MB990938
Handle
MB990938-01
TOOL
TOOL NUMBER AND
NAME
SUPERSESSION
APPLICATION
D998443
D998713
B991367
D998781
ON VEHICLE SERVICE
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ENGINE MECHANICAL <2.4L>
11A-6
O N VEH IC LE SERVIC E
DRIVE BELT TENSION CHECK AND
ADJUSTMENT
M1111003100117
Refer to GROUP 00, Maintenance Service
−
Drive Belts
IGNITION TIMING CHECK
M1111001700094
Required Special Tool:
MB991502: Scan Tool (MUT-II)
1. Before inspection, set vehicles in the following condition:
•
Engine coolant temperature: 80
−
95
°
C (176 - 203
°
F)
•
Lights and all accessories: OFF
•
Transaxle: "P" range
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
2. Connect scan tool MB991502 to the data link connector.
3. Set up a timing light.
4. Start the engine and run it at idle.
5. Check that the idle speed is approximately 700 r/min.
6. Select scan tool MB991502 actuator test "item number 17."
7. Check that basic ignition timing is within the standard value.
Standard value: 5
°°°°
BTDC
±±±±
3
°°°°
8. If the basic ignition timing is not within the standard value,
check the following items:
MB991654
Cylinder head bolt
wrench (12)
General service tool
Removal and installation of
cylinder head bolt
MD998738
Adjusting screw
General service tool
•
Holding the auto-
tensioner
•
Timing belt tension
adjustment
MD998767
Tensioner pulley socket
wrench
MD998752-01
Timing belt tension
adjustment
TOOL
TOOL NUMBER AND
NAME
SUPERSESSION
APPLICATION
D998767
AC003081 AB
16 PIN
MB991502
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