height MITSUBISHI MONTERO 1991 Owner's Manual

length of cylinder block at several points.
If warpage exceeds specifications, deck must be resurfaced.
If warpage exceeds manufacturer's maximum tolerance for material
removal, replace block.
DECK HEIGHT
Distance from the crankshaft centerline to the block
deck is termed the deck height. Measure and record front and rear main
journals of crankshaft. To compute this distance, install crankshaft
and retain with center main bearing and cap only. Measure distance
from the crankshaft journal to the block deck, parallel to the
cylinder centerline.
Add one half of the main bearing journal diameter to distance
from crankshaft journal to block deck. This dimension should be
checked at front and rear of cylinder block. Both readings should be
the same.
If difference exceeds specifications, cylinder block must be
repaired or replaced. Deck height and warpage should be corrected at
the same time.
MAIN BEARING BORE & ALIGNMENT
For checking main bearing bore, remove all bearings from
cylinder block and main bearing caps. Install main bearing caps in
original location. Tighten bolts to specification. Using inside
micrometer, measure main bearing bore in 2 areas 90 degrees apart.
Determine bore size and out-of-round. If diameter is not within
specification, block must be align-bored.
For checking alignment, place a straightedge along centerline
of main bearing saddles. Check for clearance between straightedge and
main bearing saddles. Block must be align-bored if clearance is
present.
EXPANSION PLUG REMOVAL & INSTALLATION
Removal
Drill a hole in the center of expansion plug. Remove with
screwdriver or punch. Use care not to damage sealing surface.
Installation
Ensure sealing surface is free of burrs. Coat expansion plug
with sealer. Use a wooden dowel or pipe of slightly smaller diameter,
install expansion plug. Ensure expansion plug is evenly located.
OIL GALLERY PLUG REMOVAL & INSTALLATION
Removal
Remove threaded oil gallery plugs using the appropriate
wrench. Soft, press-in plugs are removed by drilling into plug and
installing a sheet metal screw. Remove plug with slide hammer or
pliers.
Installation
Ensure threads or sealing surface is clean. Coat threaded oil
gallery plugs with sealer and install. Replacement soft press-in plugs
are driven in place with a hammer and drift.
CAMSHAFT
* PLEASE READ THIS FIRST *

Brake On/Off (BOO) Switch ................... Cruise Control Systems\
Engine Performance
Shift Interlock Systems
Buzzer Module ...................................... Warning Systems
Camshaft Position (CMP) Sensor .................. Engine Performance\
Central Control Module ........................... Anti-Theft System
Clockspring ............................... Air Bag Restraint System
Cruise Control Systems
Steering Column Switches
Clutch Pedal Position Switch .............................. Starters
Clutch Start Switch ....................................... Starters
Combination Meter ......................... Analog Instrument Panels
Constant Control Relay Module (CCRM) ............ Engine Performance\
Electric Cooling Fans
Convenience Center .............................. Power Distribution
Illumination/Interior Lights
Convertible Top Motor ........................ Power Convertible Top
Convertible Top Switch ....................... Power Convertible Top
Crankshaft Position (CKP) Sensor ................ Engine Performance\
Cruise Control Module ....................... Cruise Control Systems
Cruise Control Switch ....................... Cruise Control Systems
Condenser Fan Relay(s) ....................... Electric Cooling Fans\
Data Link Connector (DLC) ....................... Engine Performance\
Daytime Running Lights Module ............... Daytime Running Lights
Exterior Lights
Defogger Relay ................................ Rear Window Defogger
Diagnostic Energy Reserve Module (DERM) ... Air Bag Restraint System\
Discriminating Sensor (Air Bag) ........... Air Bag Restraint System\
Distributor ..................................... Engine Performance
Door Lock Actuators ............................... Power Door Locks
Remote Keyless Entry
Door Lock Relay(s) ................................ Power Door Locks\
Electrochromic Mirror ................................ Power Mirrors
Electronic Level Control (ELC)
Height Sensor .............................. Electronic Suspension
Electronic Level Control (ELC) Module ........ Electronic Suspension\
Engine Coolant Temperature (ECT)
Sending Unit ............................ Analog Instrument Panels
Engine Coolant Temperature (ECT) Sensor ......... Engine Performance\
Engine Control Module ........................... Engine Performance
Generators & Regulators
Starters
ETACS ECU .......................................... Warning Systems
Power Windows
Remote Keyless Entry
Evaporative (EVAP) Emissions Canister ........... Engine Performance\
EVAP Canister Purge Solenoid .................... Engine Performance
EVAP Canister Vent Solenoid ..................... Engine Performance
Exhaust Gas Recirculation (EGR) Valve ........... Engine Performance\
Fuel Tank Vacuum Sensor ......................... Engine Performance
Fog Lights ....................................... Headlight Systems
Daytime Running Lights
Fog Light Relay .................................. Headlight Systems
Daytime Running Lights
Fuel Door Release Solenoid ................. Power Fuel Door Release
Fuel Gauge Sending Unit ................... Analog Instrument Panels
Fuel Injectors .................................. Engine Performance
Fuel Pump ....................................... Engine Performance
Fuel Pump Relay ................................. Engine Performance
Power Distribution
Fuse/Relay Block ................................ Power Distribution
Fusible Links ................................... Power Distribution
Generators & Regulators

Starters
Generator .................................. Generators & Regulators
Engine Performance
Power Distribution
Generic Electronic Module (GEM) ............... Body Control Modules\
Electronic Suspension
Glow Plug Relay ................................. Engine Performance
Glow Plugs ...................................... Engine Performance
Grounds ........................................ Ground Distribution
Headlight Door Module .............................. Headlight Doors
Headlight Relay .................................. Headlight Systems
Daytime Running Lights
Headlights ....................................... Headlight Systems
Daytime Running Lights
Heated Oxygen Sensor(s) (HO2S) .................. Engine Performan\
ce
Heated Windshield Control Module ................ Heated Windshields
Height Sensor ................................ Electronic Suspension
Horns ..................................... Steering Column Switches
Horn Relay ................................ Steering Column Switches
Idle Air Control (IAC) Motor/Valve .............. Engine Performance\
Ignition Coil(s) ................................ Engine Performance\
Ignition Key Lock Cylinder ....................... Anti-Theft System
Ignition Module ................................. Engine Performance
Ignition Switch ................................. Power Distribution
Engine Performance
Generators & Regulators
Starters
Illuminated Entry Module .............. Illumination/Interior Lights
Illumination Lights ................... Illumination/Interior Lights
Impact Sensor ............................. Air Bag Restraint System
Inertia Fuel Shutoff Switch ..................... Engine Performance
Inhibit Relay ............................................. Starters
Instrument Cluster ........................ Analog Instrument Panels
Intake Air Temperature (IAT) Sensor ............. Engine Performance\
Interior Lights ....................... Illumination/Interior Lights
Interlock Switch .......................................... Starters
Junction Block .................................. Power Distribution
Keyless Entry Receiver ........................ Remote Keyless Entry
Key Reminder Switch ....................................... Starters
Knock Sensor .................................... Engine Performance
Lamp Control Module ................................ Exterior Lights
License Plate Lamp ................................. Exterior Lights
Lighting Control Module ................... Lighting Control Modules
Anti-Theft System
Daytime Running Lights
Headlight Systems
Lower Relay .................................. Power Convertible Top
Malfunction Indicator Light (MIL) ............... Engine Performance\
Instrument Panels
Manifold Absolute Pressure (MAP) Sensor ......... Engine Performance\
Mass Airflow (MAF) Sensor ....................... Engine Performance\
Mega Fuse .................................. Generators & Regulators
Memory Seat/Mirror Module ........................... Memory Systems
Mirror Defogger ............................... Rear Window Defogger
Moon Roof Motor .................................... Power Moon Roof
Moon Roof Relay .................................... Power Moon Roof
Multi-Function Control Module ...................... Warning Systems
Neutral Safety Switch ..................................... Starters
Oil Level Switch ................................ Engine Performance
Oil Pressure Switch/Sending Unit .......... Analog Instrument Panels
Engine Performance
Overhead Console .................................. Overhead Console
Oxygen Sensor(s) (O2S) .......................... Engine Performan\
ce

\003
PR E-A LIG NM EN T C HEC KS

1991 M it s u bis h i M onte ro
Wheel Alignment
PRE-ALIGNMENT INSPECTION PROCEDURES
PRE-ALIGNMENT CHECKS
Before making wheel alignment adjustment, perform the
following checks:
1) Tires should be equal in size and runout must not be
excessive. Tires and wheels should be in balance, and inflated to
manufacturer's specifications.
2) Wheel bearings must be properly adjusted. Steering linkage
and suspension must not have excessive looseness. Check for wear in
tie rod ends and ball joints.
3) Steering gear box must not have excessive play. Check and
adjust to manufacturer's specifications.
4) Vehicle must be at curb height with full fuel load and
spare tire in vehicle. No extra load should be on vehicle.
5) Vehicle must be level with floor and with suspension
settled. Jounce front and rear of vehicle several times and allow it
to settle to normal curb height.
6) If steering wheel is not centered with front wheels in
straight-ahead position, correct by shortening one tie rod adjusting
sleeve and lengthening opposite sleeve equal amounts.
7) Ensure wheel lug nuts are tightened to torque
specifications.

RID IN G H EIG HT A D JU STM EN T

1991 M it s u bis h i M onte ro
1991-92 WHEEL ALIGNMENT
Riding Height Adjustment
Chrysler Motors: Ram-50
Mitsubishi: Montero, Pickup
RIDING HEIGHT ADJUSTMENT
Before adjusting alignment, check riding height. Ensure
vehicle is on level floor and tires are properly inflated. Bounce
vehicle several times and allow suspension to settle.
Visually inspect vehicle, from front to rear or side to
side, for signs of abnormal height. Remove extra heavy items from
passenger and luggage compartments. If riding height is not within
specification, check and repair suspension before adjusting alignment.
See RIDING HEIGHT SPECIFICATIONS (FRONT) table.
RIDING HEIGHT SPECIFICATIONS (FRONT) ( 1)









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Application (2) In. (mm)
Montero ............................ 2.80 (71.1)
Pickup 4WD & Ram-50 4WD ............ 3.07 (78.0)
(1) - Ensure tire inflation is correct and vehicle
is level.
( 2) - Distance between lower control bump stopper
and bracket. See Fig. 1.









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RIDING HEIGHT SPECIFICATIONS 1992 (FRONT) ( 1)








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Application In. (mm)
Montero .................. 0.83-0.91 (21.0-23.0)
Pickup 4WD & Ram-50 4WD ............ 3.11 (79.0)
(1) - Distance between lower control bumper and
bracket.









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Fig. 1: Measuring Front Riding Height (Typical 4WD)
Courtesy of Mitsubishi Motor Sales of America.

4) If control arm bushing needs replacing, use press and
Bushing Remover/Installer (MB990883-01). Press bushing from control
arm. See Fig. 4.
5) Coat bushing and control arm with soapy solution. Using
press and bushing remover/installer, press bushing into control arm.
Position bushing so there is equal distance from bushing-to-control
arm at both ends.
6) Reverse bushing remover/installer to install bushing.
Position bushing so there is equal distance from bushing-to-control
arm at both ends.
CAUTION: Tighten lower control arm shaft and pivot bolt to
specification with vehicle at normal operating height.
INSTALLATION
1) To install, reverse removal procedure. Ensure White mark,
located on lower mounting end of shock absorber, faces toward outside
of vehicle. Tighten lower control arm shaft and pivot bolt to
specification with vehicle at normal operating height.
2) Tighten bolts to specification. See TORQUE SPECIFICATIONS
table at end of article. Install new nut on stabilizer bar-to-control
arm bolt. Tighten stabilizer bar-to-control arm bolt until distance
from threaded end of bolt to nut is .24-.31" (6.0-7.8 mm).
Fig. 3: Replacing Bracket Bushing
Courtesy of Mitsubishi Motor Sales of America.

Application In. (mm)
Montero
Left Side .................. 5.3-5.6 (135-142)
Right Side ................. 4.9-5.2 (124-132)
Ram-50 & Pickup
Left Side .................. 5.5-5.8 (140-147)
Right Side ................. 5.3-5.6 (135-142)









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5) After initial torsion bar setting, tighten anchor bolt
adjusting nut to obtain correct final bolt protrusion.
6) On Montero, final bolt protrusion depends upon curb weight
of vehicle. Adjust anchor bolt adjusting nut to obtain final anchor
bolt protrusion. See appropriate FINAL ANCHOR BOLT PROTRUSION table.
FINAL ANCHOR BOLT PROTRUSION TABLE (MONTERO)









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Curb Weight Right Bolt Left Bolt
Lbs. (kg) In. (mm) In. (mm)
2910 (1320) ........... 2.6 (65) .............. 2.2 (55)
3000 (1360) ........... 2.7 (68) .............. 2.2 (55)
3080 (1400) ........... 2.8 (71) .............. 2.3 (57)
3170 (1440) ........... 2.8 (71) .............. 2.4 (59)
3260 (1480) ........... 2.9 (72) .............. 2.5 (62)
3350 (1520) ........... 3.0 (76) .............. 2.5 (62)
3440 (1560) ........... 3.0 (76) .............. 2.6 (65)
3530 (1600) ........... 3.1 (78) .............. 2.6 (65)
3620 (1640) ........... 3.2 (80) .............. 2.7 (68)
3700 (1680) ........... 3.2 (80) .............. 2.8 (71)
3790 (1720) ........... 3.3 (84) .............. 2.9 (72)
3880 (1760) ........... 3.4 (86) .............. 2.9 (72)
3970 (1800) ........... 3.4 (86) .............. 3.0 (76)
4060 (1840) ........... 3.5 (88) .............. 3.1 (78)









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FINAL ANCHOR BOLT PROTRUSION (RAM-50 & PICKUP)








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Right Bolt Left Bolt
Application In. (mm) In. (mm)
Ram-50 & Pickup ..... 3.39 (86.1) ......... 3.94 (100.1)









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FINAL ANCHOR BOLT PROTRUSION (1992 MONTERO)








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Right Bolt Left Bolt
Application In. (mm) In. (mm)
Montero ............. 3.15 (80.0) .......... 3.15 (80.0)









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7) To complete installation, reverse removal procedure.
Tighten bolts to specification. See TORQUE SPECIFICATIONS table at end
of article. Place unladed vehicle in normal operating height. Measure
clearance between lower control arm bump stop and bump stop bracket on
frame.
8) On Montero, clearance should be 2.8" (71 mm). On Pickup,
clearance should be 3.1" (78 mm). If clearance measurements are NOT as\
specified, adjust anchor bolt adjusting nut to obtain correct
clearance.

Shock Absorber Shaft Nut ......... 10-13 (14-18)
Tie Rod Nut ............................ 33 (45)
Torque Arm Bolt ................. 69-87 (94-118)
INCH Lbs. (N.m)
Stabilizer Bar Clamp Bolt ........ 84-108 (8-12)
( 1) - Tighten with vehicle at normal operating
height.









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\003
* S U SPEN SIO N U NIF O RM IN SPEC TIO N G UID ELIN ES *

1 991 M it s u bis h i M onte ro
GENERAL INFORMATION
Steering, Suspension, Wheel Alignment, Wheels and Tires
Motorist Assurance Program
Standards For Automotive Repair
All Makes and Models
INTRODUCTION TO MOTORIST ASSURANCE PROGRAM (MAP)
CONTENTS
Motorist Assurance Program (MAP)
OVERVIEW
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
Steering and Suspension
AIR RIDE SUSPENSION
AIR RIDE SUSPENSION - AIR SHOCKS AND AIR STRUTS
AIR RIDE SUSPENSION - AIR SPRING VALVES
AIR RIDE SUSPENSION - AIR SPRINGS
AIR RIDE SUSPENSION - COMPRESSORS
AIR RIDE SUSPENSION - HEIGHT SENSORS
AIR RIDE SUSPENSION - MODULES
AIR RIDE SUSPENSION - RELAYS (COMPRESSOR)
AIR RIDE SUSPENSION - SWITCHES (ON/OFF)
AIR RIDE SUSPENSION - TORSION SPRINGS (COUNTER BALANCING)
AIR RIDE SUSPENSION - TUBING
AIR RIDE SUSPENSION - WARNING LAMPS
AIR RIDE SUSPENSION - WIRING HARNESSES
BALL JOINTS
BUSHINGS
CENTER LINKS
CONTROL ARM SHAFTS
CONTROL ARMS
DRAG LINKS
ELECTRONIC RIDE CONTROL SHOCKS AND STRUTS
IDLER ARMS
KING PINS
PITMAN ARMS
POWER STEERING HOSES
POWER STEERING (HYDRAULIC) PUMPS
RADIUS ARMS
RELAY RODS
SHOCK ABSORBERS, STRUT CARTRIDGES AND STRUT ASSEMBLIES
SPINDLES
SPRINGS - COIL, LEAF AND TORSION BAR
STEEL POWER STEERING LINES
STEERING ARMS
STEERING DAMPERS
STEERING GEARS (EXCEPT RACK AND PINION)
STEERING GEARS - RACK AND PINION
STEERING KNUCKLES
STRIKE OUT BUMPERS
STRUT RODS
STRUT UPPER BEARING PLATE ASSEMBLIES
SWAY BAR LINKS
SWAY BARS

the facts, allowing the customer to draw their own
conclusions and make an informed decision about how to
proceed.
STEERING AND SUSPENSION
SERVICE PROCEDURES REQUIRED AND SUGGESTED FOR PROPER VEHICLE
OPERATION
Steering and suspension are complex systems made up of a
variety of interdependent components. For proper vehicle handling,
ride, and tire wear, a thorough inspection is required whenever
suspension work is being performed.
Conditions listed assume that the problem has been isolated
to the specific component by proper testing procedures.
NOTE: When replacing steering and/or suspension components which
may affect an alignment angle, you are required to check
and adjust alignment as needed. Refer to the OEM
specifications.
CAUTION: DO NOT use ride height altering or load compensating
components, such as variable rate springs and coil over
shocks, on vehicles with height or load sensing
proportioning valve-equipped braking systems, unless
these components are original equipment.
AIR RIDE SUSPENSION
NOTE: Depending on the air suspension design, there are some
aftermarket products available to eliminate the air ride
suspension on certain vehicles. If the system has been
eliminated with one of these products, then no service is
suggested or required.
AIR RIDE SUSPENSION - AIR SHOCKS AND AIR STRUTS
NOTE: This section covers the air spring portion of the
air shock or strut. For damping portion of shock
or strut conditions and procedures, refer to the
SHOCK ABSORBERS, STRUT CARTRIDGES AND STRUT ASSEMBLIES
section.
AIR RIDE SUSPENSION - AIR SHOCK AND AIR STRUT INSPECTION









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Condition Code Procedure
Inner fabric of air bag
damaged ................ A ............ Require replacement.
Leaking ................. A .. Require repair or replacement.
Outer covering of air bag
is cracked to the extent
that inner fabric of air
bag is visible ......... 1 ............ Suggest replacement.









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AIR RIDE SUSPENSION - AIR SPRING VALVES
AIR RIDE SUSPENSION - AIR SPRING VALVE INSPECTION








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Condition Code Procedure