Mitsubishi Galant. Manual — part 54

The 6G72 (3.0L) 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 the 1, 2, 3, 4, 5 and 6 cylinders.

EN G IN E D IA G N O SIS

M1111000700080

ITEMS

SPECIFICATIONS

Type

V-type, overhead camshaft

Number of cylinders

Bore mm (in)

91.1 (3.59)

Stroke mm (in)

76.0 (2.99)

Piston displacement cm

(cu in)

2,972 (181.4)

Compression ratio

9.0

Firing order

1-2-3-4-5-6

Valve timing

Intake valve

Opens (BTDC)

Closes (ABDC)

Exhaust valve

Opens (BBDC)

Closes (ATDC)

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 the 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

TSB Revision

ENGINE MECHANICAL <3.0L>

11C-3

SPECIA L TO O LS

M1111000600124

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 tran-
saxle

GENERAL SERVICE
TOOL
MZ203827
Engine lifter

MZ203827-01

MD998443
Lash adjuster holder (8)

MD998443-01

Supporting of the lash
adjuster to prevent it from
falling when rocker shaft
assembly is removed or
installed

B991502

MB991453

MZ203827

D998443

SPECIAL TOOLS

TSB Revision

ENGINE MECHANICAL <3.0L>

11C-4

MB990767
End yoke holder

MB990767-01

Holding the camshaft
sprocket and crankshaft
pulley when loosening and
tightening bolt

MD998715
Crankshaft pulley holder
pin

MIT308239

MD998713
Camshaft oil seal installer

MD998713-01

Camshaft oil seal
installation

MB991559
Camshaft oil seal installer
adapter

−

Camshaft oil seal
installation (left bank side)
(Use with MD998713)

MD998717
Crankshaft front oil seal
installer

MD998717-01

Crankshaft front oil seal
installation

MD998781
Flywheel stopper

General service tool

Flywheel <M/T> or drive
plate <A/T> supporting

MD998718
Crankshaft rear oil seal
installer

MD998718-01

Crankshaft rear oil seal
installation

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB990767

D998715

D998713

B991559

D998717

D998781

D998718

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Mitsubishi Galant. Manual — part 54

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