2001 Jeep Grand Cherokee OEM Service & Repair Manual

ENGINE page page page page DESCRIPTION AND OPERATION ENGINE ................................. 2 LUBRICATION SYSTEM ..................... 3 CYLINDER BLOCK......................... 5 CYLINDER HEAD.......................... 5 CRANKSHAFT ............................ 5 PISTON AND CONNECTING ROD ............. 5 CAMSHAFT .............................. 6 ROCKER ARM ............................ 6 VALVES ................................. 7 VALVE SPRING ........................... 7 VALVE STEM SEAL ........................ 7 CYLINDER HEAD COVER ................... 7 HYDRAULIC TAPPET ....................... 7 OIL PAN ................................. 7 INTAKE MANIFOLD ........................ 8 EXHAUST MANIFOLD ...................... 8 DIAGNOSIS AND TESTING ENGINE DIAGNOSIS—INTRODUCTION......... 8 SERVICE DIAGNOSIS—PERFORMANCE ....... 9 SERVICE DIAGNOSIS—MECHANICAL......... 10 HYDRAULIC TAPPETS..................... 12 INTAKE MANIFOLD LEAKAGE DIAGNOSIS ..... 12 CYLINDER COMPRESSION PRESSURE TEST . . 13 CYLINDER HEAD GASKET FAILURE DIAGNOSIS ........................... 13 CYLINDER COMBUSTION PRESSURE LEAKAGE TEST ........................ 14 ENGINE OIL LEAK INSPECTION ............. 14 ENGINE OIL PRESSURE ................... 15 SERVICE PROCEDURES FORM-IN-PLACE GASKETS & SEALERS ....... 15 ENGINE GASKET SURFACE PREPARATION .... 16 ENGINE PERFORMANCE .................. 16 HONING CYLINDER BORES ................ 17 REPAIR DAMAGED OR WORN THREADS ...... 18 HYDROSTATIC LOCK ..................... 18 ENGINE OIL............................. 18 VALVE TIMING ........................... 20 PISTON FITTING ......................... 20 PISTON RING—FITTING ................... 21 FITTING CONNECTING ROD BEARINGS....... 23 FITTING CRANKSHAFT MAIN BEARINGS ...... 26 REMOVAL AND INSTALLATION ENGINE MOUNTS—FRONT ................. 29 ENGINE MOUNT—REAR ................... 29 ENGINE BENDING BRACES ................ 31 ENGINE ASSEMBLY....................... 31 INTAKE AND EXHAUST MANIFOLD ........... 34 CYLINDER HEAD COVER .................. 35 ROCKER ARMS AND PUSH RODS ........... 35 VALVE STEM SEAL AND SPRING ............ 36 CYLINDER HEAD......................... 37 VALVES AND VALVE SPRINGS .............. 39 HYDRAULIC TAPPETS..................... 39 VIBRATION DAMPER ...................... 40 TIMING CASE COVER ..................... 40 TIMING CHAIN AND SPROCKETS ............ 41 CAMSHAFT ............................. 42 CAMSHAFT BEARINGS .................... 43 CRANKSHAFT MAIN BEARINGS ............. 44 OIL PAN ................................ 46 PISTONS AND CONNECTING RODS .......... 48 CRANKSHAFT OIL SEALS—REAR............ 49 OIL PUMP .............................. 50 TIMING CASE COVER OIL SEAL ............. 50 DISASSEMBLY AND ASSEMBLY VALVE SERVICE ......................... 51 CYLINDER BLOCK........................ 53 CLEANING AND INSPECTION INTAKE AND EXHAUST MANIFOLD ........... 54 CYLINDER HEAD......................... 54 CYLINDER HEAD COVER .................. 54 ROCKER ARMS AND PUSH RODS ........... 54

HYDRAULIC TAPPETS..................... 54 CYLINDER BLOCK........................ 55 SPECIFICATIONS SPECIFICATIONS ........................ 56 TORQUE SPECIFICATIONS ................. 59 SPECIAL TOOLS 4.0L ENGINE ............................ 60 • • • • Fig. 1 Engine Firing Order Fig. 2 Build Date Code Location 1 – YEAR 2 – MONTH 3 – DAY

Oil Lubrication System—4.0L Engine

1 – CAM/CRANK MAIN GALLERY (7) 2 – TAPPET GALLERY 3 – TAPPET GALLERY 4 – CAMSHAFT BEARING 5 – NUMBER 1 CAMSHAFT BEARING JOURNAL 6 – CAMSHAFT SPROCKET 7 – TAPPET GALLERY Fig. 3 4.0L Cylinder Block with Main Bearing Caps and Cap Brace 1 – BLOCK 2 – MAIN BEARING CAP BRACE Fig. 4 Cylinder Head 4.0L Engine 1 – CYLINDER HEAD BOLTS 2 – CYLINDER HEAD GASKET 3 – CYLINDER HEAD

2001 Jeep Grand Cherokee OEM Service & Repair Manual

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