Mitsubishi Outlander XL. Manual — part 155
GROUP 11A
ENGINE MECHANICAL
CONTENTS
GENERAL INFORMATION. . .
ENGINE DIAGNOSIS. . . ...
SERVICE SPECIFICATIONS. . .
SEALANTS. . . . . ...
SPECIAL TOOLS. . . . ..
ON-VEHICLE SERVICE. . . .
GENETATOR DRIVE BELT TENSION CHECK
. . . . . . . ...
AUTO-TENSIONER CHECK. . ...
DRIVE BELT TENSION CHECK AND
ADJUSTMENT. . . . . .
VALVE CLEARANCE CHECK AND ADJUSTMENT
. . . . . . . ..
ROCKER ARM PISTON OPERATION CHECK
. . . . . . . ..
IGNITION TIMING CHECK. . .
CURB IDLE SPEED CHECK. . .
IDLE MIXTURE CHECK. . .
COMPRESSION PRESSURE CHECK. . . .
MANIFOLD VACUUM CHECK. . .
LASH ADJUSTER CHECK. . ...
CRANKSHAFT PULLEY. . . .
REMOVAL AND INSTALLATION. ..
CAMSHAFT OIL SEAL. . . .
REMOVAL AND INSTALLATION. ..
CAMSHAFT AND VALVE STEM SEAL
. . . . . . . ..
REMOVAL AND INSTALLATION. ..
OIL PAN AND OIL STRAINER. ..
REMOVAL AND INSTALLATION. ..
INSPECTION. . . . ....
CRANKSHAFT FRONT OIL SEAL. .
REMOVAL AND INSTALLATION. ..
CRANKSHAFT REAR OIL SEAL. ..
REMOVAL AND INSTALLATION. ..
CYLINDER HEAD GASKET. . ..
REMOVAL AND INSTALLATION. ..
TIMING BELT. . . . ...
REMOVAL AND INSTALLATION. ..
INSPECTION. . . . ....
ENGINE ASSEMBLY. . . ...
REMOVAL AND INSTALLATION. ..
11A-1
GENERAL INFORMATION
M11102000001USA0000010001
The 6B31 (3.0 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)
87.6 (3.45)
Stroke mm (in)
82.9 (3.26)
Total displacement cm3(cu. in)
2,998 (182.9)
Compression ratio
9.5
Firing order
1-2-3-4-5-6
Valve timing
Intake valve
Opens (BTDC)
-1° <Low speed cam>
18° <High speed cam>
Closes (ABDC)
37° <Low speed cam>
86° <High speed cam>
Exhaust valve
Opens (BBDC)
55°
Closes (ATDC)
17°
Lubrication system
Pressure feed, full-flow filtration
Oil pump type
Trochoid type
ENGINE DIAGNOSIS
M11102000007USA0000010000
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
Incorrect valve clearance <Intake side>
Adjust valve clearance
11A-2
ENGINE MECHANICAL
GENERAL INFORMATION
SYMPTOMS
PROBABLE CAUSE
REMEDY
Malfunction of lash adjuster (including
entry of air into high pressure chamber)
<Exhaust side>
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.
SERVICE SPECIFICATIONS
M11102000003USA0000010000
Item
Standard value
Limit
Power steering oil pump drive belt tension
(When checked)
Vibration frequency Hz
128 - 165
-
Tension N (lb)
294 - 490 (66 - 110)
-
Deflection
(Reference)
mm (in)
11.9 - 15.6 (0.47 -
0.61)
-
Power steering oil pump drive belt tension
(When adjusted)
Vibration frequency Hz
138 - 157
-
Tension N (lb)
343 - 441 (77 - 99)
-
Deflection
(Reference)
mm (in)
12.7 - 14.6 (0.50 -
0.57)
-
Power steering oil pump drive belt tension
(When replaced)
Vibration frequency Hz
165 - 196
-
Tension N (lb)
490 - 686 (110 - 154) -
Deflection
(Reference)
mm (in)
9.2 - 11.9 (0.36 -
0.47)
-
Basic ignition timing at idle
5°BTDC ± 3°
-
Actual ignition timing at curb idle
Approximately
10°
BTDC
-
CO contents %
0.5 or less
-
HC contents ppm
100 or less
-
Curb idle speed r/min
600 ± 100
-
Compression pressure (200 r/min) kPa (psi)
1,460 (212)
Minimum
1,050 (153)
Compression pressure difference of all cylinder kPa (psi)
-
98 (14)
Intake manifold vacuum at curb idle kPa (in Hg)
-
Minimum
60 (18)
Auto-tensioner rod protrusion amount mm (in)
9.1 - 13.4 (0.36 -
0.52)
-
ENGINE MECHANICAL
11A-3
SERVICE SPECIFICATIONS
SEALANTS
M11102000005USA0000010000
Item
Specified sealant
Engine upper oil pan, engine lower oil
pan
3M™ AAD Part No.8672, 8704, 3M™ AAD Part No.8679/8678 or
equivalent
Engine oil pressure switch
3M™ ADD Part number 8672 or equivalent
SPECIAL TOOLS
M11102000006USA0000010000
Tool
Tool number and name Supersession
Application
B992080
A
B
MB992080
Belt tension meter set
A: MB992081
Belt tension meter
B: MB992082
Microphone assembly
Tool not available
Drive belt tension check
11A-4
ENGINE MECHANICAL
SEALANTS
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