Mitsubishi Galant 9G. Manual — part 1377
GENERAL DESCRIPTION
TSB Revision
ENGINE MECHANICAL <3.8L ENGINE>
11C-2
GENERAL DESCRIPTION
M1111000100419
The 6G75 (3.8 L) engine is a six-cylinder engine. The
cylinder numbers are assigned as 1-3-5 for the right
bank and 2-4-6 for the left bank from the front of the
engine (timing belt side). This engine is fired in the
order of 1-2-3-4-5-6 cylinders.
ITEMS
SPECIFICATIONS
Type
V type, overhead camshaft
Number of cylinders
6
Bore mm (in)
95.0 (3.74)
Stroke mm (in)
90.0 (3.54)
Total displacement cm
3
(cu. in)
3,828 (233.6)
Compression ratio
10.0
Firing order
1-2-3-4-5-6
Valve timing
Intake valve
Opens (BTDC)
7
°
Closes (ABDC)
61
°
Exhaust valve
Opens (BBDC)
61
°
Closes (ATDC)
15
°
Lubrication system
Pressure feed, full-flow filtration
Oil pump type
Trochoid type
ENGINE DIAGNOSIS
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ENGINE MECHANICAL <3.8L ENGINE>
11C-3
ENGINE DIAGNOSIS
M1111000700273
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 engine oil
pressure
Engine oil level is too low
Check the engine oil level.
Malfunction of engine oil pressure switch Replace the engine 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 the correct
viscosity.
Stuck (opened) oil relief valve
Repair the relief valve.
Excessive bearing clearance
Replace the bearings.
Engine oil pressure
too high
Stuck (closed) oil relief valve
Repair the relief valve.
Noisy valves
Malfunction of lash adjuster (including
entry of air into high pressure chamber)
Check the lash adjuster.
Thin or diluted engine oil (low engine 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.
SPECIAL TOOLS
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ENGINE MECHANICAL <3.8L ENGINE>
11C-4
SPECIAL TOOLS
M1111000600986
TOOL
TOOL NUMBER AND
NAME
SUPERSESSION APPLICATION
MB991958
Scan tool (MUT-III sub
assembly)
A: MB991824
Vehicle
communication
interface (V.C.I.)
B: MB991827
MUT-III USB cable
C: MB991910
MUT-III main harness
A (Vehicles with CAN
communication
system)
D: MB991911
MUT-III main harness
B (Vehicles without
CAN communication
system)
E: MB991914
MUT-III main harness
C (for Daimler
Chrysler models only)
F: MB991825
MUT-III measurement
adapter
G: MB991826
MUT-III trigger
harness
MB991824-KIT
NOTE: G:
MB991826
MUT-III Trigger
Harness is not
necessary when
pushing V.C.I.
ENTER key.
• Drive belt tension check
• Ignition timing check
• Curb idle speed check
• Idle mixture check
• Erasing the diagnostic trouble
code
CAUTION
For vehicles with CAN
communication, use MUT-III main
harness A to send simulated
vehicle speed. If you connect
MUT-III main harness B instead,
the CAN communication does
not function correctly.
MB991668
Belt tension meter set
Tool not available Drive belt tension check [used
together with scan tool (MUT-III sub
assembly)]
MB991800
Pulley holder
MB991800-01
Holding the crankshaft pulley
MB991910
MB991826
MB991958
MB991911
MB991914
MB991824
MB991827
MB991825
DO NOT USE
A
B
C
D
E
F
G
DO NOT USE
B991668
MB991800
SPECIAL TOOLS
TSB Revision
ENGINE MECHANICAL <3.8L ENGINE>
11C-5
MB991802
Pin B
MB991802-01
Holding the crankshaft pulley
MB990767
End yoke holder
MB990767-01
Holding the camshaft sprocket
MD998715
Crankshaft pulley holder
pin
MIT308239
Holding the camshaft sprocket
MD998443
Auto-lash adjuster holder
MD998443-01
Holding the auto-lash adjuster
MD998713
Camshaft oil seal
installer
MD998713-01
Press-in of the camshaft oil seal
MB991559
Camshaft oil seal adapter
installer
MB991559-01
Press-fitting the camshaft oil seal
(left bank side)
MD998051
Cylinder head bolt
wrench
MD998051-01 or
General service
tool
Cylinder head bolt removal and
installation
MD998717
Crankshaft front oil seal
installer
MD998717-01
Press-in of the crankshaft front oil
seal
MD998781
Flywheel stopper
General service
tool
Securing the drive plate
TOOL
TOOL NUMBER AND
NAME
SUPERSESSION APPLICATION
MB991802
B990767
D998443
D998713
B991559
D998781
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