4.9L v8 - VIN [B] Cadillac Seville IV

ENGINE IDENTIFICATION

Note. For engine repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article in the GENERAL INFORMATION section.

Engine may be identified by the eighth character of Vehicle Identification Number (VIN), stamped on plate located on top of instrument panel near lower left corner of windshield. If eighth character is "B", vehicle is equipped with 4.9L V8 PFI engine. Vehicle model year is identified by the tenth character of VIN. If tenth character is "P", vehicle model year is 1993.

ENGINE IDENTIFICATION CODES

Engine model year is also identified by the second character of engine identification number. Engine identification number is stamped on plate on left side of cylinder block-to-transaxle flange. (Scheme 1) If second character of engine identification number is "P", engine model year is 1993. Fourth through ninth characters are the engine serial number, which may be required when ordering parts.

Scheme 1

VALVE CLEARANCE ADJUSTMENT

Engine is equipped with hydraulic valve lifters, no valve clearance adjustment is required.

TROUBLE SHOOTING

Note. To trouble shoot engine mechanical components, see appropriate table in TROUBLE SHOOTING article in GENERAL INFORMATION.

REMOVAL & INSTALLATION

Note. For reassembly reference, label all electrical connectors, vacuum hoses and fuel lines before removal. Also place mating marks on engine hood and other major assemblies before removal.

FUEL PRESSURE RELEASE

Disconnect negative battery cable. Loosen fuel tank filler cap to relieve fuel tank pressure. Wrap shop towel around fuel gauge hose fitting, and connect fuel gauge hose to fuel pressure fitting on fuel line. Position a bleed hose into container. Open pressure relief valve and bleed fuel pressure.

1. Release fuel system pressure. See FUEL PRESSURE RELEASE. Disconnect negative battery cable. Drain coolant. Remove air cleaner and hood. Remove radiator fan. Remove serpentine drive belt. Disconnect upper radiator hose and heater hose from thermostat housing.
2. Disconnect electrical connectors at oil pressure switch, distributor, EGR solenoid, coolant temperature switch, idle speed control motor, throttle position sensor, coolant temperature sensor/fuel injector harness (near fuel rail), manifold air temperature sensor, oxygen sensor, alternator and ground wire (at alternator bracket).
3. Disconnect throttle cable from throttle lever. Remove cruise control diaphragm and bracket. Disconnect exhaust pipes at manifolds. Disconnect oil cooler and transmission fluid cooler lines from radiator. Remove radiator.
4. Disconnect oil cooler lines from oil filter adapter, and remove oil cooler lines. Remove oil cooler line bracket from transaxle. Remove air cleaner mounting bracket and oil filter adapter.
5. On models with heated windshield, disconnect electrical connector from alternator. On all models, remove strut tower-to-body braces. Disconnect heater hose from heater pipe on engine. Remove power steering line bracket from right cylinder head.
6. Leave hoses connected and remove power steering pump and tensioner assembly. Discharge A/C system using approved refrigerant recycling/recovery system. Disconnect refrigerant lines from accumulator and condenser. Disconnect fuel lines from fuel rail. Remove fuel line bracket from transaxle, and move fuel lines aside.
7. Disconnect vacuum modulator line and power brake vacuum hose, and position aside. Raise and support vehicle. Remove starter heat shield. Disconnect starter wiring and ground wires from cylinder block.
8. Remove starter and 2 flexplate covers. Remove flexplate-to-torque converter bolts. Remove lower dust shield from A/C compressor. Remove right front wheel and plastic shield. Remove transaxle-to-engine support from right rear of engine. Remove engine/transaxle assembly right rear mount bolt.
9. Remove engine lower damper nut. Remove engine front mount nuts and transaxle right rear mount bolts. Disconnect oxygen sensor connector. Remove heater by-pass bracket (right side of vehicle). CAUTION: When connecting engine hoist right front lift hook, ensure clearance between lifting chain and A/C accumulator line.
10. Lower vehicle. Remove 5 engine-to-transaxle bolts. Connect engine hoist and remove engine. To install, reverse removal procedure. See TORQUE SPECIFICATIONS. Fill cooling system. Evacuate and charge A/C system.

Removal

1. Release fuel system pressure. See FUEL PRESSURE RELEASE under REMOVAL & INSTALLATION. Disconnect negative battery cable. Remove air cleaner. Drain cooling system and disconnect necessary coolant hoses. Remove strut tower-to-body braces. Remove serpentine drive belt.
2. Remove power steering pump and tensioner bracket assembly with hoses attached. Remove alternator and bracket. Disconnect all electrical connections, vacuum hoses and control cables. Remove MAP sensor hoses.
3. Remove A/C hose bracket. Mark distributor location and remove distributor. DO NOT rotate crankshaft with distributor removed. Disconnect fuel lines at transaxle bracket. Remove fuel and vacuum lines from throttle body.
4. Loosen vacuum line clip at lift bracket. Disconnect vacuum supply line (at throttle body) and transaxle modulator line. Remove EGR solenoid and bracket assembly. Remove valve covers. Remove rocker arms and push rods. See ROCKER ARMS & PUSH RODS under REMOVAL & INSTALLATION. CAUTION: Note intake manifold bolt length and location. Install bolts in proper location to prevent engine damage. (Scheme 2)
5. Remove brackets from right cylinder head. Remove oil filter and rear engine lift bracket. Remove intake manifold bolts. Note location and length of manifold bolts. Remove intake manifold, gaskets and seals.

Installation

1. Install NEW front and rear manifold seals and side gaskets. Apply RTV sealant to corners of end seals where seals contact side gaskets. Ensure gasket holes align with cylinder head.
2. Install intake manifold. Install bolts in specified location. (Scheme 2) Tighten bolts to specification. See TORQUE SPECIFICATIONS.
3. To complete installation, reverse removal procedure. Ensure rocker arm components are installed in original location and reference mark is aligned on distributor.

Scheme 2

Removal - Left Side (DeVille/Sixty-Special)

Disconnect negative battery cable. Remove both cooling fans. Disconnect exhaust crossover pipe. Remove serpentine drive belt. Remove bracket from power steering pump and tensioner. Remove exhaust manifold bolts and manifold.

Removal - Left Side (Eldorado & Seville)

1. Disconnect negative battery cable. Remove air cleaner, starter shield and serpentine belt. Remove bracket from power steering pump and tensioner. Remove A/C hose bracket and cooling fan.
2. Disconnect spark plug wires. Raise and support vehicle. Disconnect exhaust pipe. Remove A/C brace from manifold. Remove exhaust manifold bolts and exhaust manifold.

Removal - Right Side (DeVille/Sixty-Special)

1. Disconnect negative battery cable and exhaust crossover pipe. Remove air cleaner. Disconnect oxygen sensor and coolant temperature sensor connectors.
2. Remove 2 upper forward exhaust manifold bolts. Raise and support vehicle. Disconnect exhaust pipe. Support engine cradle with jacks. Remove engine rear cradle bolts. Loosen engine front cradle bolts. Slightly lower the engine cradle. Remove remaining exhaust manifold bolts and manifold.

Removal - Right Side (Eldorado & Seville)

1. Disconnect negative battery cable. Remove air cleaner and 2 heat shield screws. Raise and support vehicle. Disconnect exhaust pipe. Remove engine brace from manifold. Disconnect oxygen sensor wire.
2. Remove heat shield. Support engine cradle with jacks. Remove cradle rear bolts on both sides. Loosen cradle front bolts. Slightly lower engine cradle. Remove exhaust manifold bolts and manifold.

Installation (All Models)

Apply a thin layer of dry graphite on manifold sealing surfaces. Install manifold and tighten bolts to specification. See TORQUE SPECIFICATIONS. To complete installation, reverse removal procedure.

Disconnect negative battery cable. Remove intake manifold and exhaust manifold. See INTAKE MANIFOLD and EXHAUST MANIFOLD under REMOVAL & INSTALLATION. Remove engine lift bracket. Remove dipstick tube (left side only). Remove cylinder head bolts, cylinder head and gasket.

1. Clean oil, coolant and debris from cylinder block bolt holes and cylinder head bolt threads. Apply GM Lubricant (1052356) to head bolts.
2. Install NEW gasket to cylinder head, aligning holes in gasket with dowels on cylinder block. Install cylinder head and tighten bolts to specification in sequence. See TORQUE SPECIFICATIONS. (Scheme 3) To complete installation, reverse removal procedure.

Scheme 3

1. Disconnect negative battery cable. Remove serpentine drive belt. Raise and support vehicle. Remove right front tire and air deflector. NOTE: It may be necessary to apply air pressure to one cylinder to prevent crankshaft from rotating while removing crankshaft damper.
2. Loosen heater by-pass line, and position aside. Remove crankshaft damper bolt and washer. Install Puller Pilot (J-21052-4) into crankshaft damper hole. Install Puller (J-38416) and remove crankshaft damper.
3. Install crankshaft damper bolt into crankshaft and finger tighten. Using Puller Arms (J-23129) and Puller (J-1859-03), remove seal from front cover.

1. Polish crankshaft damper hub seal surface with fine emery cloth. Lubricate NEW seal lip with engine oil. Install seal on crankshaft with garter spring toward engine. Using Seal Installer(J-29662) and hammer, install seal until it bottoms in front cover. NOTE: Seal may also be pressed in using seal installer with Crankshaft Damper Installer (J-29774).
2. Lubricate crankshaft damper hub sealing surface with engine oil. Using crankshaft damper installer, install crankshaft damper until it seats on crankshaft. Remove crankshaft damper installer. To complete installation, reverse removal procedure.

1. Disconnect negative battery cable. Drain cooling system. Remove accessory drive belt and crankshaft pulley. Remove right strut tower-to-body brace and coolant reservoir.
2. Remove water pump. See WATER PUMP under REMOVAL & INSTALLATION. Raise and support vehicle. Remove right front tire and air deflector. NOTE: It may be necessary to apply air pressure to one cylinder to prevent crankshaft from rotating while removing crankshaft damper.
3. Loosen heater by-pass line, and position aside. Remove crankshaft damper bolt and washer. Install Puller Pilot (J-21052-4) into crankshaft damper hole. Install Puller (J-38416) and remove crankshaft damper.
4. Remove front cover bolts, front cover and gasket. Note direction of oil slinger installation and remove from crankshaft.
5. Rotate crankshaft until timing marks are aligned with No. 1 cylinder at TDC of compression stroke. (Scheme 4) Remove and discard thrust button (bearing) from end of camshaft. Remove camshaft sprocket bolt. Remove timing chain and sprockets from crankshaft and camshaft at same time.

1. Install sprockets and chain. Ensure camshaft dowel aligns with camshaft sprocket and timing marks are aligned. Install camshaft sprocket retaining bolt and tighten to specification. See TORQUE SPECIFICATIONS.
2. Install NEW thrust button. Install oil slinger. Apply bead of RTV sealant to oil pan-to-front cover sealing area, inward of the oil pan-to-front cover bolt holes.
3. Apply RTV sealant to corners where oil pan, cylinder block and front cover join. Install front cover using NEW gasket. To complete installation, reverse removal procedure. See CRANKSHAFT FRONT SEAL under REMOVAL & INSTALLATION.

Scheme 4

ROCKER ARMS & PUSH RODS

1. Disconnect negative battery cable. Remove components as necessary for valve cover removal. Remove valve covers. Remove rocker arm support bolts and nuts. (Scheme 5) Remove rocker arm support with rocker arms and pivots attached.
2. Mark push rod location for reassembly reference and remove push rods. To remove rocker arms from support, place support in vise. Mark pivot and rocker arm locations for reassembly reference. Remove pivot bolts, pivots and rocker arms.

1. Lubricate all components with Axle Lubricant (1052271). Install push rods in original location.
2. Install rocker arms, pivots and self-tapping pivot bolts on rocker arm support. Tighten pivot bolts to specification. See TORQUE SPECIFICATIONS.
3. Position support with rocker arms onto cylinder head. Install support nuts and bolts. Evenly tighten support nuts until snug. Ensure push rods are aligned in rocker arm seats.
4. Evenly tighten support bolts until snug. Tighten support nuts and bolts to specification. Apply RTV sealant to NEW triangular seal at intake manifold and cylinder head contact points. Install valve cover.

Scheme 5

Remove intake manifold. See INTAKE MANIFOLD under REMOVAL & INSTALLATION. Remove valve guide retainer. (Scheme 6) Mark valve lifter location for reassembly reference. Remove valve lifters and guides, using Valve Lifter Remover (J-29834).

Apply GM Lubricant (1052365) to lifter roller. To install, reverse removal procedure. Ensure components are installed in original location.

Scheme 6

CAMSHAFT

Note. Install NEW valve lifters and distributor drive gear when installing NEW camshaft.

1. Remove engine. See ENGINE under REMOVAL & INSTALLATION. Remove timing chain. See TIMING CHAIN under REMOVAL & INSTALLATION.
2. Remove valve lifters. See VALVE LIFTERS under REMOVAL & INSTALLATION. Remove camshaft and bearings (if necessary).

Inspection

Inspect camshaft journal diameter, lobe lift and oil clearance. See CAMSHAFT table under ENGINE SPECIFICATIONS. Replace components if not within specifications.

Install camshaft bearings (if removed), ensuring oil holes are aligned. Lubricate camshaft bearings, camshaft lobes and distributor drive gear with GM Lubricant (1052365). Install camshaft. To complete installation, reverse removal procedure.

Remove transaxle and flexplate. See appropriate AUTOMATIC TRANSMISSIONS article in TRANSMISSION SERVICING. Note direction of seal installation. Carefully pry seal from housing using Seal Remover (J-26868). DO NOT damage crankshaft sealing surface.

Coat seal lip with wheel bearing grease. Install seal on crankshaft with spring facing engine. Using Seal Installer (J-34604), install rear seal until even with, or no more than .040" (1 mm) below, surface of block. To complete installation, reverse removal procedure.

1. Disconnect negative battery cable. Drain cooling system. On Eldorado and Seville, remove coolant recovery tank. On all models, remove water pump pulley (use pry bar to push belt tensioner against belt to keep pulley from rotating).
2. Remove serpentine belt. On DeVille/Sixty-Special, raise and support vehicle. Remove splash shield to access water pump bolts. On all models, remove water pump and gasket. Note nut and bolt locations for installation reference.

To install, reverse removal procedure using NEW gasket. Tighten water pump nuts and bolts to specification. (Scheme 7)

Scheme 7

Disconnect negative battery cable. Raise and support vehicle. Drain oil. Remove 2 flexplate covers. On Eldorado and Seville, remove exhaust crossover pipe. On all models, remove oil pan bolts and oil pan.

Clean cylinder block and oil pan sealing surfaces. Apply 1/4" bead of RTV sealant to corners of rear main bearing cap and front cover-to-cylinder block joints. Install oil pan and NEW gasket. Tighten bolts to specification. See TORQUE SPECIFICATIONS. To complete installation, reverse removal procedure. Fill crankcase.

Cylinder Head

Cylinder head warpage information is not available from manufacturer.

Valve Springs

1. Measure valve spring free length and tension (pressure). Replace valve spring if free length and tension are not within specification. See VALVES & VALVE SPRINGS table under ENGINE SPECIFICATIONS.
2. Intake valve spring is Yellow and exhaust valve spring is Black. Measure valve spring installed height between valve stem tip and spring seat. If installed height exceeds specification, replace cylinder head or valve.

Valve Stem Oil Seals

Pry seal off guide using small screwdriver. DO NOT reuse seal. Lubricate NEW seal with engine oil. Use Valve Stem Seal Installer (J-29790) to install seal until bottomed on valve guide.

Note. Some factory engines may be equipped with .003" (.08 mm) oversized valve stem. These engines have a 3 stamped on cylinder head gasket surface in line with oversized valves.

Valve Guides

1. Measure valve stem-to-guide oil clearance. If clearance exceeds specification, ream valve guide and install oversized valve. See CYLINDER HEAD table under ENGINE SPECIFICATIONS. Valve guides are not replaceable.
2. Oversized valves are available in .003" (.08 mm) and .006" (.15 mm) oversize. Ream guide using Reamer (J-5830-1) for .003" (.08 mm) oversized valve or Reamer (J-5830-6) for .006" (.15 mm) oversized valves.
3. If installing oversized valve, stamp 3 or 6 (for .003" or .006" oversized valves) on the cylinder head gasket surface in line with oversized valves.

Valve Seat

Valve seats are not replaceable.

Valves

Measure valve head diameter, stem diameter and margin. Replace valve if head diameter, stem diameter and margin are not within specification. See VALVES & VALVE SPRINGS table under ENGINE SPECIFICATIONS. DO NOT lap NEW valves, as protective coating will be damaged. Lightly lap reused valves.

Valve Seat Correction Angles

After grinding, if seat is too wide, use 20-degree and/or 70-degree stones to narrow the seat.

VALVE TRAIN

Rocker Arm Assembly

Place rocker arm support in vise. Mark pivot and rocker arm locations for reassembly reference. Remove pivot bolts, pivots and rocker arms. Lubricate all components with Axle Lubricant (1052271) before reassembly.

Note. Valve lifter plunger and body are fitted pair. DO NOT interchange with parts from other valve lifters.

Valve Lifters

1. To disassemble, push down on push rod cup and remove lock ring. (Scheme 8) Remove push rod cup, metering disc and plunger.
2. If plunger is stuck in lifter body, place lifter (push rod end down) in Lifter Plunger Remover (J-4160). Hold remover in hand with thumb over lifter body. Strike tool sharply on block of wood to dislodge plunger. Remove remaining components.
3. To reassemble, insert ball, small spring and ball retainer. Snap ball retainer into recess in plunger. Place spring over ball retainer. Slide lifter body over plunger at an angle to help seat spring.
4. Turn lifter upright. Fill plunger with clean engine oil. Jiggle ball with small piece of wire until oil drains from plunger into body and trapped air is released from body. Refill plunger with oil.
5. Place metering disc and push rod cup on top of plunger. Position lock ring over push rod cup and press into groove using Valve Lifter Lock Ring Installer (J-2730). Apply GM Lubricant (1052365) to camshaft lobe contact on bottom of lifter.

Scheme 8

CYLINDER LINER

Note. Measure cylinder liner height when replacing cylinder block or cylinder liner. Measurement is not required when installing original cylinder liner in original cylinder block location.

1. Disconnect negative battery cable. Remove cylinder head. See CYLINDER HEAD under REMOVAL & INSTALLATION. Remove oil pan. See OIL PAN under REMOVAL & INSTALLATION.
2. Install Cylinder Liner Holder (J-29775) on cylinder block. Note direction and location of piston installation. Remove piston and connecting rod. Using ink, place match mark on cylinder liner and block for reassembly reference. Remove cylinder liner and "O" ring. Discard "O" ring.

Installation (Original Cylinder Liners)

1. Ensure cylinder liner and cylinder block mating surfaces are clean. Remove burrs or nicks using fine emery cloth. Lightly lubricate NEW "O" ring with oil, and install on bottom of cylinder liner. Install cylinder liner into cylinder block in original position, aligning match marks made during disassembly.
2. Seat cylinder liners and install cylinder liner holder. Install pistons in original cylinder liner with notch on top of piston toward front of engine. Install remaining components.

Installation (New Cylinder Liners)

1. Install new cylinder liner (without "O" ring) in cylinder block. Position Cylinder Liner Gauge (J-29776) onto cylinder block surface and zero gauge. (Scheme 9)
2. Install spring-loaded pins of gauge into cylinder liner. Ensure machine pads on gauge rest on cylinder liner and indicator stem contacts block deck surface.
3. Apply slight pressure and note reading. If reading is on the (+) side, cylinder liner is higher than cylinder block deck. If reading is on the (-) side, cylinder liner is lower than cylinder block deck. NOTE: Cylinder liner height gauge is graduated in millimeters.
4. Measure and record cylinder liner height at 3 locations. (Scheme 9) Correct liner height is 0-.003" (0-.08 mm) above cylinder block deck. Cylinder liners may be rotated to obtain correct height. If liners are rotated, match mark new position for reassembly reference. Replace cylinder liner if liner height is not within specification.
5. After obtaining correct cylinder liner height, measure liner-to-liner height. To measure liner-to-liner height, install cylinder liners (without "O" rings), in original position adjacent to cylinder liner being measured.
6. Using cylinder liner gauge, measure cylinder liner height difference between cylinder liners while holding cylinder liners in position. (Scheme 9)
7. Liner-to-liner height difference must be within ±.002" (±.05 mm). After obtaining liner-to-liner height, match mark liner location for reassembly reference. Repeat procedure on all cylinder liners.
8. After measurement is completed, remove cylinder liner. Install NEW, lightly lubricated "O" ring on cylinder liner, and install cylinder liner. Ensure match marks are aligned. Seat cylinder liners, and install cylinder liner holder. Install pistons in cylinder liner with notch on piston top toward front of engine. Install remaining components.

Scheme 9

Scheme 10

Scheme 11

CYLINDER BLOCK ASSEMBLY

Note. Mark components before removal and disassembly. Install components in original locations.

Piston & Rod Assembly

If connecting rod is bent, replace piston, rod and cylinder liner. Install piston and connecting rod assembly with notch on top of piston toward front of engine.

Fitting Pistons

Measure piston diameter 1.25" (32 mm) below top of piston at 90-degree angle to piston pin. Measure cylinder liner bore 2" (51 mm) below top of cylinder liner. If piston clearance is not to specification, replace piston and cylinder liner. See PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS.

Piston Rings

Measure piston ring end gap and side clearance. If end gap and side clearance are not to specification, replace rings and/or piston. See PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS. Install piston rings with identification mark (dimple) toward top of piston. Ensure ring end gaps are correctly spaced around piston. (Scheme 12)

Scheme 12

Rod Bearings

Ensure tangs on bearings are positioned in notches on rod and cap before tightening cap nuts. Measure rod bearing oil clearance. Replace bearing if clearance exceeds specification. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS.

Crankshaft & Main Bearings

1. Number of grooves on left side of bearing cap identifies bearing caps No. 1, 2 and 3. Bearing cap No. 4 has no grooves. CAUTION: DO NOT alter bearing inserts or touch bearing surface with fingers. DO NOT interchange main bearings. If rear main bearing cap is removed, replace crankshaft rear seal and apply RTV sealant as specified in steps 6) and 7).
2. Except for bearing No. 5 (rear bearing), upper and lower bearing halves are interchangeable (within same bearing). The No. 3 (center) bearing is thrust bearing. Oversized bearings for clearance adjustment are available for bearings No. 1 and 5 only.
3. If bearing clearance is measured with engine in vehicle, remove bearing caps adjacent to bearing being measured. Install a .005" (.13 mm) strip of brass shim stock between crankshaft and lower half of each adjacent bearing. Tighten shimmed bearing caps lightly to avoid damage. This supports crankshaft against upper bearing halves.
4. Measure bearing oil clearance. If clearance is not within specification, replace main bearings. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS. If clearance is still not to specification, replace crankshaft. Measure crankshaft end play. See THRUST BEARING.
5. To align No. 3 thrust bearing surfaces, install bearing cap bolts finger tight. Pry crankshaft to extreme fore and aft positions several times. Pry crankshaft to forward position and tighten bearing cap bolts to specification. See TORQUE SPECIFICATIONS.
6. When installing No. 5 bearing cap, fill groove on each side of bearing cap with RTV sealant. Slide a small washer over RTV tube nozzle (inside hole of washer must be small enough to seal against RTV tube nozzle).
7. Insert nozzle into groove so washer seals nozzle to crankcase. Force RTV into groove until full, indicated by RTV being forced out between block and main bearing cap at split line, either on flywheel side or crankshaft side. Ensure RTV is even with cap and block surface. Scrape excess RTV from pan sealing surface, except when installing pan while RTV is wet.

Thrust Bearing

To measure crankshaft end play, pry crankshaft to extreme forward position. Using feeler gauge, measure distance between crankshaft thrust face and thrust face of No. 3 bearing (front side of bearing). If not within specification, replace thrust bearing and/or crankshaft as necessary. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS.

Cylinder Block

Cylinder block deck warpage information is not available from manufacturer.

ENGINE LUBRICATION SYSTEM

Positive displacement (gear-to-gear) oil pump, mounted to bottom of cylinder block, is driven by hexagonal shaft from distributor. Oil enters pump through screened pick-up tube, and is pumped through outlet tube to passage in cylinder block. This passage leads to oil filter adapter on back of cylinder block. Adapter contains 2 non-serviceable, integral by-pass valves. From the adapter, oil is directed to the oil cooler, then back to filter. Oil then flows to main galleries. (Scheme 13)

Scheme 13

Crankcase Capacity

Engine oil capacity is 5 qts. (4.7L) without filter and 5.5 qts. (5.2L) with filter change.

Oil Pressure

Normal oil pressure is 11 psi (.77 kg/cm 2 ) at idle and 53 psi (3.73 kg/cm 2 ) at 2000 RPM with engine at normal operating temperature.

Removal & Disassembly

Disconnect negative battery cable. Raise and support vehicle. Remove oil pan. See OIL PAN under REMOVAL & INSTALLATION. Remove 2 bolts and one nut securing oil pump to engine. Remove oil pump, "O" ring and hexagon drive shaft from block. To disassemble, remove pump cover. Remove inlet tube and outlet tubes from cover and housing. Slide inner (drive) and outer (driven) rotors from housing. Remove plug and pressure regulator valve.

Oil pump specifications are not available from manufacturer. Check all components for excessive wear, scoring and flatness. Fill pressure regulator valve cavity in housing with light-weight oil. Replace oil pump if cavity leaks.

Reassembly & Installation

To assemble, position outer rotor in rotor pocket with slots toward bottom of pump. Insert inner rotor into outer rotor with internal hex drive toward top of pump. Rotate gears to ensure no binding exists. To reassemble, reverse disassembly procedure. To install, reverse removal procedure using NEW "O" ring.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

GENERAL ENGINE SPECIFICATIONS

GENERAL SPECIFICATIONS

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS SPECIFICATIONS

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS SPECIFICATIONS

CONNECTING RODS SPECIFICATIONS

CONNECTING RODS SPECIFICATIONS

PISTONS, PINS & RINGS SPECIFICATIONS

PISTONS, PINS & RINGS SPECIFICATIONS

CYLINDER BLOCK SPECIFICATIONS

CYLINDER BLOCK SPECIFICATIONS

VALVES & VALVE SPRINGS SPECIFICATIONS

VALVES & VALVE SPRINGS SPECIFICATIONS

CYLINDER HEAD SPECIFICATIONS

CYLINDER HEAD SPECIFICATIONS

CAMSHAFT SPECIFICATIONS

CAMSHAFT SPECIFICATIONS

VALVE LIFTERS SPECIFICATIONS

VALVE LIFTERS SPECIFICATIONS

See also:
• ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION
• ROCKER ARMS & PUSH RODS