Mitsubishi Montero (1991+). Manual — part 9

OIL PRESSURE

Oil pressure should be at least 11.4 psi (.8 kg/cm

) at idle

and engine oil temperature of 167-194

F (75-90

C).

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

Application In. (mm)

Driven Rotor-To-Pump Body . . .0039-.0071 (.099-.180)

Rotor Side Clearance . . . . .0016-.0037 (.041-.094)

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)

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.

TORQUE SPECIFICATIONS TABLE (3000GT)

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.

ENGINE SPECIFICATIONS

GENERAL ENGINE SPECIFICATIONS

GENERAL SPECIFICATIONS TABLE

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

CRANKSHAFT, MAIN & CONNECTING

ROD BEARINGS SPECIFICATIONS

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS TABLE

Application In. (mm)

Crankshaft

End Play

Standard . . . . . .. .0020-.0098 (.050-.250)

Limit . . . . . . . . . .. .012 (.30)

Main Bearings

Journal Diameter . . . . . . ... 2.36 (59.9)

Journal Out-Of-Round

SOHC . . . . . . . . . . .0002 (.005)

DOHC . . . . . . . . . .00012 (.003)

Journal Taper . . . . . . . . .0002 (.005)

Oil Clearance

Standard

SOHC . . . . . . .0008-.0019 (.020-.048)

DOHC . . . . . . .0007-.0017 (.018-.043)

Limit . . . . . . . . . .. .004 (.10)

Connecting Rod Bearings

Journal Diameter . . . . . . . 1.965 (49.91)

Journal Out-Of-Round

SOHC . . . . . . . . . . .0002 (.005)

DOHC . . . . . . . . . .00012 (.003)

Journal Taper . . . . . . . . .0002 (.005)

Oil Clearance

Standard . . . . . .. .0006-.0018 (.015-.046)

Limit . . . . . . . . . .. .004 (.10)

CONNECTING RODS SPECIFICATIONS

CONNECTING RODS TABLE

Application In. (mm)

Maximum Bend . . . . . . . . .. .002 (.05)

Maximum Twist (Total Rod Length) . . . .. .004 (.10)

Side Play

Standard . . . . . ... .0039-.0099 (.099-.251)

Limit . . . . . . . . . ... .016 (.41)

PISTONS, PINS & RINGS SPECIFICATIONS (SOHC)

PISTONS, PINS & RINGS TABLE (SOHC)

Application In. (mm)

Pistons

Clearance . . . . . .. .0008-.0016 (.020-.040)

Diameter . . . . . . . . . 3.587 (91.11)

Pins

Piston Fit . . . . . . . . . . . ( 1)

Rod Fit . . . . . . . . . . . ( 2)

Rings

No. 1

End Gap

Standard . . . . . .0118-.0177 (.300-.450)

Limit . . . . . . . . . .031 (.79)