1991 MITSUBISHI MONTERO torque

Measure cylinder bore and piston skirt diameter. Piston skirt
diameter should be measured at 90-degree angle to piston pin.
Clearance between piston and cylinder bore must be within
specification. See appropriate PISTONS, PINS & RINGS table under
ENGINE SPECIFICATIONS at end of article.
PISTON PIN REPLACEMENT
1) Note reference mark on top of piston and connecting rod.
See Fig. 23 . Using press and Piston Pin Remover/Installer (MD998184
for SOHC or MD998765 for DOHC), remove pin.
2) Inspect piston for cracks and damage. Check ring side
clearance. Replace piston if not within specification. See appropriate
PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS.
3) Check connecting rod for bend and twist. Replace
connecting rod if twist exceeds .004" (.10 mm) or bend exceeds .002"
(.05 mm). Pressure required to install pin in rod is 1686-3934 lbs.
(7500-17,500 N).
4) Position piston on connecting rod. Ensure reference marks
on top of piston and connecting rod are aligned. See Fig. 23.
Lubricate all components with oil. To install, reverse removal
procedure. Ensure piston pin is centered in piston.
NOTE: Install piston with reference mark aligned with connecting
rod reference mark. See Fig. 23.
CRANKSHAFT & MAIN BEARINGS
1) Remove flywheel or drive plate. Remove
transaxle/transmission mounting plate and rear seal case. Remove oil
pump, oil pan and oil pick-up tube. Ensure connecting rods and main
bearing cap are marked for location.
2) Remove connecting rod caps and bearings. Note direction of
arrow on main bearing cap. Remove main bearing cap. See Fig. 24.
Ensure all components are placed in correct order. Remove crankshaft.
Remove main bearings from cylinder block. Mark bearings for location.
3) Inspect crankshaft for cracks and damaged gear or threads.
Check crankshaft for taper and out-of-round. Replace or repair
crankshaft if it is not within specification. See CRANKSHAFT, MAIN &
CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS at end of
article.
4) Install upper main bearings in cylinder block. Ensure oil
hole is aligned and bearing is properly seated. Lubricate bearings
with engine oil. Install thrust bearings on No. 3 main bearing journal
with oil grooves toward crankshaft thrust surface.
5) Install crankshaft in block. Install thrust bearing on No.
3 main bearing cap with oil grooves toward crankshaft thrust surface.
Install main bearing cap with arrow toward front of engine.
6) Check oil clearance using Plastigage method. Tighten bolts
to specification in proper sequence. See Fig. 24. See appropriate
TORQUE SPECIFICATIONS table at end of article. Remove main bearing
cap. Clearance must be within specification. See CRANKSHAFT, MAIN &
CONNECTING ROD BEARINGS table. If oil clearance exceeds specification,
replace bearings or crankshaft.
7) Ensure crankshaft rotates freely with main bearing cap
installed. Check crankshaft end play. See CRANKSHAFT, MAIN &
CONNECTING ROD BEARINGS table.
8) Install connecting rod caps and bearings. Ensure
components are installed in original location. Tighten rod nuts to
specification. See appropriate TORQUE SPECIFICATIONS table. Ensure
connecting rods move freely on crankshaft. To complete installation,
reverse removal procedure. Tighten bolts to specification.

OIL PRESSURE
Oil pressure should be at least 11.4 psi (.8 kg/cm) at idle
and engine oil temperature of 167-194F (75-90C).
OIL PUMP
Removal
Remove timing belt and crankshaft sprocket. See TIMING BELT
under REMOVAL & INSTALLATION. Remove oil pan. See OIL PAN under
REMOVAL & INSTALLATION. Remove oil filter and mounting bracket. Remove
oil pump and gasket from cylinder block. Note bolt length and location
for installation.
Disassembly & Inspection
1) Disassemble pump, and check for scoring and cracks.
Install rotors in pump body. Check clearance between driven rotor and
pump body. See OIL PUMP SPECIFICATIONS table. Place straightedge
across pump body to check rotor side clearance.
2) Check clearance between straightedge and both rotors.
Replace rotor set or pump assembly if not within specification. Ensure
relief valve slides freely in pump body bore. Inspect relief valve
spring for damage.
OIL PUMP SPECIFICATIONS TABLE









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Application In. (mm)
Driven Rotor-To-Pump Body ........ .0039-.0071 (.099-.180)
Rotor Side Clearance ............. .0016-.0037 (.041-.094)









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Reassembly & Installation
1) Reassemble pump. Tighten pump rear cover bolts to
specification. See appropriate TORQUE SPECIFICATIONS table in this
article. Install oil pump and gasket. Ensure splined teeth of oil pump
align with crankshaft. Install bolts, and tighten to specification.
2) If oil seal was removed, coat new seal with grease. Using
Seal Installer (MD998717), install seal in oil pump until flush with
case. Install remaining components.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE (MONTERO & PICKUP)








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Application Ft. Lbs. (N.m)
Air Intake Plenum Stay Bolts ............... 11-14 (15-19)
Camshaft Bearing Cap Bolt .................. 14-15 (19-20)
Camshaft Sprocket Bolt ..................... 58-72 (79-98)
Connecting Rod Nut ......................... 37-38 (50-52)
Crankshaft Pulley Bolt
Montero .............................. 108-116 (146-157)
Pickup ............................... 130-137 (176-186)
Cylinder Head Bolt ( 1)
Cold Engine .............................. 65-72 (88-98)
Drive Plate Bolt ........................... 53-55 (72-75)
Exhaust Manifold Nut ....................... 11-16 (15-22)
Flywheel Bolt .............................. 53-55 (72-75)
Intake Manifold Bolts ...................... 11-15 (15-20)
Left Engine Support Bracket Bolt ........... 15-21 (20-30)

Main Bearing Cap Bolt ...................... 55-61 (75-83)
Oil Pick-Up Tube Bolt ...................... 11-15 (15-20)
Rear Engine Support
Bracket-To-Engine Bolt .................... 13-18 (18-25)
Relief Valve Plug .......................... 29-36 (39-49)
Right Engine Support Bracket Bolt
10x22 mm ................................. 25-36 (34-49)
12x22 mm & 12x32 mm ...................... 47-61 (64-83)
Rocker Shaft ............................... 14-15 (19-20)
Timing Belt Tensioner Bolt ................. 16-21 (22-29)
Water Pump Bolt ............................ 14-20 (19-27)
INCH Lbs. (N.m)
Delivery Pipe Bolt ......................... 84-108 (9-12)
Distributor Adapter Bolt .................. 108-132 (12-15)
Oil Filter Bracket Bolt .................. 108-120 (12-14)
Oil Pan Bolt ................................. 48-60 (5-7)
Oil Pump Cover Bolt ........................ 72-108 (8-12)
Oil Pump Mounting Bolt ................... 108-120 (12-14)
Rear Seal Case Bolt ........................ 84-108 (9-12)
Rocker Cover Bolt ............................ 72-84 (8-9)
Throttle Body Bolt ......................... 84-108 (9-12)
Timing Belt Cover Bolt ..................... 84-108 (9-12)
Transmission Mounting Plate Bolt ........... 84-108 (9-12)
( 1) - Tighten in 2 steps using proper sequence.
See Fig. 4.









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TORQUE SPECIFICATIONS TABLE (3000GT)








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Application Ft. Lbs. (N.m)
Air Intake Plenum Stay Bolts ..................... 13 (18)
Automatic Tensioner Bolt ......................... 17 (23)
Camshaft Bearing Cap Bolt ........................ 15 (20)
Camshaft Sprocket Bolt ........................... 65 (88)
Connecting Rod Nut ............................... 38 (52)
Crankshaft Pulley Bolt
SOHC ................................. 108-116 (146-157)
DOHC ................................. 130-137 (176-186)
Cylinder Head Bolt ( 1)
SOHC ................................... 76-83 (103-113)
DOHC
Non-Turbo ............................. 76-83 (103-113)
Turbo ................................. 87-94 (118-127)
Distributor Adapter Bolt ......................... 11 (15)
Drive Plate Bolt ................................. 55 (75)
Engine Support Bracket Bolt
Except 10x40 mm ........................ 76-83 (103-113)
10x40 mm ................................. 47-54 (63-73)
Exhaust Manifold Nut ............................. 13 (18)
Flywheel Bolt .................................... 55 (75)
Intake Manifold Bolt
Lower Manifold
Non-Turbo ............................... 11-15 (15-20)
Turbo .................................... 9-11 (12-15)
Upper Manifold ................................. 13 (18)
Main Bearing Cap Bolt ............................ 58 (79)
Oil Filter Bracket Bolt .......................... 11 (15)
Oil Pick-Up Tube Bolt ............................ 14 (19)
Oil Pump Mounting Bolt ........................... 11 (15)

Rear Engine Support
Bracket-To-Engine Bolt .................... 13-18 (18-25)
Relief Valve Plug ................................ 33 (45)
Rocker Shaft ............................... 14-15 (19-20)
Roll Stopper Bracket Through Bolts ......... 36-43 (49-58)
Turbocharger-To-Exhaust Fitting ............ 40-47 (54-64)
Timing Belt Tensioner Bolt ....................... 31 (42)
Water Pump Bolt .................................. 17 (23)
INCH Lbs. (N.m)
Delivery Pipe Bolt .............................. 108 (12)
Oil Pan Bolt ................................. 48-60 (5-7)
Oil Pump Cover Bolt .............................. 96 (11)
Rear Seal Case Bolt .............................. 96 (11)
Rocker Cover Bolt
SOHC ....................................... 72-84 (8-9)
DOHC ............................................ 26 (3)
Throttle Body Bolt ......................... 84-108 (9-12)
Timing Belt Cover Bolt ..................... 84-108 (9-12)
Transmission Mounting Plate Bolt ........... 84-108 (9-12)
( 1) - Tighten in 2 steps using proper sequence.
See Fig. 4.









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ENGINE SPECIFICATIONS
GENERAL ENGINE SPECIFICATIONS
GENERAL SPECIFICATIONS TABLE








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Application Specification
3.0L V6 DOHC Non-Turbo
Displacement ....................... 181.4 Cu. In. (3.0L)
Bore ................................... 3.587" (91.1 mm)
Stroke ................................. 2.992" (76.0 mm)
Compression Ratio ................................ 10.0:1
Fuel System ......................................... PFI
Horsepower @ RPM ............................. 222 @ 6000
Torque Ft. Lbs. @ RPM ........................ 201 @ 4500
3.0L V6 DOHC Turbo
Displacement ....................... 181.4 Cu. In. (3.0L)
Bore ................................... 3.587" (91.1 mm)
Stroke ................................. 2.992" (76.0 mm)
Compression Ratio ................................. 8.0:1
Fuel System ......................................... PFI
Horsepower @ RPM ............................. 300 @ 6000
Torque Ft. Lbs. @ RPM ........................ 307 @ 2500
3.0L V6 SOHC
Displacement ....................... 181.4 Cu. In. (3.0L)
Bore ................................... 3.587" (91.1 mm)
Stroke ................................. 2.992" (76.0 mm)
Compression Ratio ................................. 8.9:1
Fuel System ......................................... PFI
Horsepower @ RPM ............................. 143 @ 5000
Torque Ft. Lbs. @ RPM ........................ 168 @ 2500









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Removal
1) Remove shaft nut while holding armature plate with clutch
disk wrench. Install clutch disk puller and remove clutch plate.
Remove snap ring from center of clutch pulley.
2) Use a universal gear puller to remove clutch pulley. See
Fig. 3 .Remove screw securing clutch coil ground lead. Use puller to
remove clutch coil.
Installation
1) To install clutch coil, reverse removal procedure.
Carefully press clutch coil into place. Ensure that coil lead and
connector are positioned on same side as removed coil.
2) Install a NEW clutch pulley snap ring, being careful not
to damage shaft seal. Press clutch plate into place. Install shaft nut
and torque to 0.9-1.4 INCH lbs. (0.10-.12 N.m).
3) Use a feeler gauge to check clutch plate-to-pulley
clearance. Clearance should be .012-.024" (0.3-0.6 mm). If clearance
is too large, remove shaft nut and again press in clutch plate. If
clearance is too small, increase gap by pulling up clutch plate. Do
not remove shaft nut.
Fig. 3: Explode View of Compressor Clutch (Calsonic V5)
Courtesy of Nissan Motor Co. U.S.A.
DIESEL KIKI ROTARY VANE CLUTCH R & I

hardware.
Attaching hardware
not functioning ........ A ... Require repair or replacement
of hardware.
Leaking ................. B .. Require repair or replacement.
Linkage bent (rear
load valves) ........... A ... Require repair or replacement
of linkage.
Linkage broken (rear
load valves) ........... A ... Require repair or replacement
of linkage.
Linkage disconnected
(rear load valves) ..... C ... Require repair or replacement
of linkage.
Pressure out of
specification .......... B ...... Require adjustment. If not
possible, require replacement.
Seized .................. A ............ Require replacement.
Sticking ................ A .. Require repair or replacement.
Terminal burned,
affecting performance .. A ........... (1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Wire lead burned ........ A .. Require repair or replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
( 1) - Determine cause and correct prior to repair or replacement
of part.









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WHEEL ATTACHING HARDWARE
For conditions noted below, also check condition of wheel
stud holes.
CAUTION: Proper lug nut torque is essential. Follow manufacturer's
torque specifications and tightening sequence. DO NOT
lubricate threads unless specified by the vehicle
manufacturer.
WHEEL ATTACHING HARDWARE INSPECTION









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Condition Code Procedure
Bent .................... A ............ Require replacement.
Broken .................. A ........ ( 1) Require replacement.
Loose ................... B ... Require repair or replacement
of affected component.

Removal
1) Raise and support vehicle. Remove front wheel(s). Separat\
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rubber flex hose from hydraulic line at brake hose mount, located on
strut housing. Secure end of hydraulic line to prevent spillage of
brake fluid.
2) Remove hose clip from brake hose mount. Disconnect brake
hose from caliper. Remove upper and lower caliper-to-steering knuckle
bolts. Lift caliper body upward. Remove caliper.
Installation
To install, reverse removal procedure. Tighten bolts to
specification. See the TORQUE SPECIFICATIONS table. Bleed brake
system. See BLEEDING BRAKE SYSTEM .
FRONT BRAKE ROTOR
Removal (Montero, Pickup 4WD & Ram-50 4WD)
Raise and support vehicle. Remove and support brake calipers.
Place hub in free-wheeling position. Remove drive hub cover using an
oil filter wrench and protective cloth. Remove snap ring, shim and
free-wheeling hub from drive axle. See Fig. 7. Remove lock washer.
Remove lock nut using Lock Nut Wrench (MB990954). Remove front hub
assembly.
Fig. 7: Exploded View of Front Brake Assembly (4WD)
Courtesy of Mitsubishi Motor Sales of America.
Installation
1) Install front hub assembly. Install and tighten lock nut
to 94-145 ft. lbs. (127-197 N.m), and then loosen and retighten to 18
ft. lbs. (24 N.m). Loosen lock nut 30-40 degrees. Reverse removal
procedure for remaining components. After installation is complete,
check drive axle end play. Adjust end play if not .002" (.05 mm) or
less. Rotate drive axle forward and rearward until maximum end play is
obtained.
2) If adjusting axle shaft end play, use proper shim to
obtain desired end play. Shim is located behind snap ring on end of
drive axle. Install shim, and recheck axle end play.
Removal (Pickup 2WD & Ram-50 2WD)
Raise and support vehicle. Remove front caliper. Remove hub
(dust) cap, cotter pin and nut. Remove washer and outer wheel bearing.\
Remove front hub assembly. Remove bolts attaching rotor to front hub,
and separate assemblies.

Maximum Refinish Diameter ..................... 10.1 (257)
Wheel Cylinder Diameter
Montero ................................... .875 (22.22)
Pickup & Ram-50
2WD ..................................... .937 (23.80)
4WD ..................................... .875 (22.22)
Discard Diameter ........................... 10.12 (257.0)
(1) - Information is not available.









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TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS TABLE








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Application Ft. Lbs. (N.m)
Caliper Guide or Lock Pin Bolt
Guide Pin Bolt ........................... 29-36 (40-49)
Lock Pin Bolt ............................ 23-30 (31-41)
Caliper Mounting Bolts ..................... 58-72 (79-98)
Front Wheel Bearing Nut .............................. ( 1)
Rotor-To-Hub Bolts Or Nuts
Pickup (2WD) ............................ 34-38 (46-52)
All Others ............................... 36-43 (49-58)
INCH Lbs. (N.m)
Master Cylinder-To-Power Brake Unit Nut .... 72-108 (8-12)
( 1) - See FRONT BRAKE ROTOR under REMOVAL & INSTALLATION.









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