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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) |