5.0L v8 - VIN [H] Chevrolet Cutaway P30

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 can be identified by eighth character of Vehicle Identification Number (VIN). VIN is stamped on a metal tag on top left end of instrument panel, near windshield. See ENGINE IDENTIFICATION table.

Engine can also be identified by engine identification (ID) number, stamped on front of cylinder block, immediately forward of right cylinder head or on left side of cylinder block, on engine-to-transmission mating flange.

ENGINE IDENTIFICATION CODES

VALVE CLEARANCE ADJUSTMENT

Note. Although valve clearance adjustment is not usually required (engine uses hydraulic valve lifters), perform the following procedures after servicing valve train.

1. Rotate engine until No. 1 piston is on TDC of compression stroke. Go to step 2) and adjust specified valves as listed in «VALVE CLEARANCE ADJUSTMENT»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) table.
2. Loosen rocker arm adjusting nut until lash is present. Tighten adjusting nut until lash is removed (under this condition, push rod cannot be rotated with fingers). Tighten adjusting nut one full turn.
3. Rotate crankshaft 360 degrees to bring No. 6 piston to TDC of compression stroke. Adjust remaining valves. See the «VALVE CLEARANCE ADJUSTMENT»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) table.

VALVE CLEARANCE ADJUSTMENT

GENERAL PRECAUTION

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 battery terminals. Loosen fuel tank cap to relieve tank pressure. Internal constant bleed feature in throttle body injection unit relieves fuel system pressure when ignition switch is turned off. No further pressure relief is required.

ENGINE

Note. Engine and transmission are removed as an assembly.

Removal & Installation

1. Release fuel system pressure. See «FUEL PRESSURE RELEASE»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__fuel-pressure-release) . Disconnect battery negative cable. Drain cooling system.
2. Remove coolant recovery reservoir. Remove grille, lower grille valance and upper radiator support. Discharge A/C refrigerant system. Remove A/C condenser and radiator. Remove power steering pump with hoses attached and set aside (if equipped).
3. Remove engine cover, air cleaner and throttle body injection unit. Disconnect fuel lines, electrical connectors, vacuum hoses, coolant hoses and control cables as necessary. Remove thermostat housing and oil filler tube. Raise and support vehicle. Disconnect exhaust pipes from manifolds.
4. Disconnect drive shaft from transmission. Disconnect transmission shift linkage and vehicle speed sensor connector from transmission. Drain crankcase. Remove transmission mount bolts. Support engine with jack.
5. Remove front engine mounts and place wood blocks between cylinder block and frame. Lower vehicle. Attach engine hoist. Remove engine and transmission as an assembly. To install, reverse removal procedure. Fill crankcase and cooling system. Evacuate and charge A/C system.

Removal

1. Release fuel system pressure. See «FUEL PRESSURE RELEASE»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__fuel-pressure-release) . Disconnect battery. Drain cooling system. Remove air cleaner.
2. Disconnect fuel lines, electrical connectors, vacuum hoses, coolant hoses and control cables as necessary. Remove alternator bracket, A/C compressor (with hoses attached), throttle body injection unit and cruise control servo as necessary.
3. Remove distributor cap. Mark distributor rotor in relation to distributor housing. Mark base of distributor housing in relation to intake manifold. Remove distributor. Remove intake manifold bolts, intake manifold and gaskets.

Installation

1. Install gaskets on cylinder heads. Apply a 3/16" (5 mm) bead of RTV sealant to front and rear intake manifold-to-cylinder block mounting surfaces. (Scheme 17) Extend bead 1/2" (13 mm) beyond cylinder block-to-cylinder head junction.
2. Install intake manifold and bolts. Tighten bolts in sequence to specification. (Scheme 18) See «TORQUE SPECIFICATIONS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__torque-specifications). To complete installation, reverse removal procedure. Fill cooling system.

Scheme 17

Scheme 18

Remove heat stove tube. Remove all attached brackets and heat shields. If necessary, remove dip stick tube. Disconnect oxygen sensor electrical connector. Disconnect exhaust pipe from manifold. Remove exhaust manifold bolts and exhaust manifold.

Install manifold. Tighten bolts to specification. See TORQUE SPECIFICATIONS . Bend over lock tabs (if equipped). To complete installation, reverse removal procedure.

1. Release fuel system pressure. See «FUEL PRESSURE RELEASE»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__fuel-pressure-release) . Remove intake manifold. See «INTAKE MANIFOLD»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) .
2. Remove exhaust manifold. See «EXHAUST MANIFOLD»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) . Remove valve covers. Loosen rocker arm nuts. Rotate rocker arms to side. Remove push rods and mark for reassembly to original locations. Remove cylinder head bolts. Remove cylinder head.

1. Clean gasket surfaces, bolt threads and bolt holes. If using steel head gasket, thinly coat both sides of gasket with sealant. DO NOT apply sealant to composition (steel/asbestos) head gaskets. Position head gasket on cylinder block. Ensure all holes align. Coat head bolt threads with Sealant (1052080).
2. Install cylinder head with bolts finger-tight. Tighten head bolts in sequence to specification. (Scheme 19) See «TORQUE SPECIFICATIONS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__torque-specifications). Lubricate valve tip, rocker arm pivot and push rod socket with Molykote.
3. To complete installation, reverse removal procedure. Adjust valves. See «VALVE CLEARANCE ADJUSTMENT»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__valve-clearance-adjustment) under ADJUSTMENTS.

Scheme 19

Remove accessory drive belt(s) and pulley. Remove crankshaft damper bolt. Using Damper Puller/Installer (J-23523-E), remove crankshaft damper. Carefully pry seal from cover with screwdriver. DO NOT distort front cover.

1. Coat seal lip with engine oil. Using Seal Installer (J-35468), install new seal in front cover with seal lip facing engine. Apply RTV sealant to Woodruff keyway in crankshaft damper.
2. Install crankshaft damper. Install crankshaft damper bolt and tighten to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__torque-specifications) . To install remaining components, reverse removal procedure.

1. Disconnect battery. Drain cooling system. If necessary, remove radiator shroud. Remove accessory drive belts, fan and pulley. Remove crankshaft damper bolt. Using Damper Puller/Installer (J-23523-E), remove crankshaft damper.
2. Remove all mounting brackets and coolant hoses attached to water pump. Remove water pump. Remove oil pan. See «OIL PAN»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h). Remove front cover and gasket.
3. Rotate crankshaft until timing marks on camshaft and crankshaft sprockets are aligned. (Scheme 20) Remove camshaft sprocket and timing chain. To remove crankshaft sprocket, use Sprocket Puller (J-5825-A).

1. Install Woodruff key in crankshaft (if removed). Using Crankshaft Sprocket Installer (J-5590), install crankshaft sprocket. Install camshaft sprocket and timing chain, ensuring timing marks on sprockets are aligned. (Scheme 20)
2. Install and tighten camshaft sprocket bolts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__torque-specifications). Install gasket to front cover with gasket sealant. Install front cover and gasket.
3. Apply RTV sealant to Woodruff keyway in crankshaft damper. Install crankshaft damper. Install crankshaft damper bolt and tighten to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__torque-specifications). To install remaining components, reverse removal procedure.

Scheme 20

ROCKER ARM STUDS

1. Rocker arm studs are pressed into cylinder head. Using Stud Remover (J-5802-01), place remover over stud. Install flat washer and nut. Tighten nut to remove stud from cylinder head.
2. If stud is loose in cylinder head, ream stud bore for oversize stud using Reamer (J-5715) for .003" (.08 mm) oversize stud and (J-6036) for .013" (.33 mm) oversize stud.
3. Coat press-fit area of stud with hypoid axle lubricant. Using Stud Driver (J-6880), drive stud into bore until driver bottoms against cylinder head.

1. Remove intake manifold. See «INTAKE MANIFOLD»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) . Remove valve covers. Loosen all rocker arm nuts and rotate rockers to one side.
2. Remove push rods, noting location for reassembly reference. Remove lifters, noting location for reassembly reference.

Coat lifter feet and body with High Viscosity Oil/Zinc (12345501). Install lifters in original location. To install remaining components, reverse removal procedure.

Remove radiator, A/C condenser (if equipped) and grille. Remove valve lifters. See VALVE LIFTERS . Remove timing chain and camshaft sprocket. See TIMING CHAIN & SPROCKETS . If necessary, raise engine. Remove camshaft.

Coat camshaft lobes and bearing journals with High Viscosity Oil/Zinc (12345501). Install camshaft. To install remaining components, reverse removal procedure.

Remove transmission, clutch (M/T) and flywheel. Using screwdriver, pry seal from housing. DO NOT scratch crankshaft sealing surface. Note direction of seal lip.

1. Lubricate inner and outer diameter of seal with engine oil. Place seal on Seal Installer (J-35621). Position seal installer against crankshaft.
2. Thread the attaching screws into crankshaft flange and tighten with screwdriver. This squares the seal with the crankshaft. Rotate seal installer handle until it bottoms. Remove seal installer. Install flywheel, clutch (M/T) and transmission.

Disconnect battery. Drain cooling system. Remove all drive belts, coolant hoses and mounting brackets attached to water pump. If necessary, remove fan shroud. Remove fan and pulley. Remove water pump and gaskets.

Install water pump with new gaskets. Tighten water pump bolts to specification. See TORQUE SPECIFICATIONS . To install remaining components, reverse removal procedure.

1. Disconnect the negative battery cable. Raise the vehicle and support with suitable safety stands. Drain the engine oil. Disconnect the oil cooler lines from housing adapter.
2. Remove the flywheel/torque converter cover. Remove the starter and the cable from the oil pan clamp along with the automatic transmission cooler lines. Remove the oil pan bolts, nuts, and reinforcements. Remove the oil pan and gasket.

Cleaning

Clean the gasket surfaces on the engine and the oil pan.

Inspection

Inspect the oil pan gasket for damage. Replace if necessary.

1. Apply sealant GM P/N 1052080 (or equivalent) to the front cover-to-block joint and to the rear crankshaft seal-to-block joint. Apply the sealant from about 25 mm (1 inch) in both directions from each of the four corners.
2. Install the oil pan bolts, nuts, and reinforcements. Tighten the oil pan bolts to 11 N.m (100 in.lbs.) and the oil pan nuts to 22 N.m (200 in. lb.). Install the starter. Install the flywheel/ torque converter cover.
3. Connect the oil cooler lines, then lower the vehicle. Fill the crankcase with the proper quantity and grade of engine oil. Connect the negative battery cable.

OIL PUMP

Note. Pick-up tube is serviceable, however, DO NOT remove tube from pump body unless tube is damaged..

Removal & Disassembly

1. Remove oil pan. See OIL PAN. Remove oil pump bolt. Remove pump and extension shaft. Remove pick-up tube (if necessary).
2. Remove pump cover. Mark relationship between gears at a meshing point for reassembly. Remove gears. Remove pressure regulator valve retaining pin. Remove pressure regulator valve and spring.

Inspect pump body and cover for cracks or excessive wear. Inspect pump gears for damage or wear. Check drive gear shaft for looseness in pump body. Check pressure regulator valve for fit in bore. Replace entire pump assembly if damaged. Inspect inlet tube and screen assembly for damage.

Reassembly & Installation

1. Install pump gears into pump body with marked gear teeth indexed. If pick-up tube was removed, apply sealant to tube end. Tap tube end into pump using plastic hammer. Reassemble remaining components in reverse order of disassembly.
2. Prime oil pump with engine oil. Install pump and extension shaft, ensuring slot on top of extension shaft engages with drive tang on end of distributor shaft. Tighten oil pump bolt to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__torque-specifications) . Install oil pan.

VALVE SPRINGS

1. Measure valve spring free length, installed height and pressure (tension). Replace valve spring if not within specification. See «VALVES & VALVE SPRINGS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) table under ENGINE SPECIFICATIONS.
2. Measure installed height between cylinder head spring seat (or top of shim, if shimmed) and top of spring shield. If installed height exceeds specification, install shims as necessary to bring installed height to specification. Ensure installed height is not less than specified.

VALVE STEM OIL SEALS

1. Intake and exhaust valves use upper "O" ring seal and lower umbrella seal.
2. When installing umbrella seal, seat the seal against valve guide boss on cylinder head. Coat upper "O" ring seal with engine oil before installation and ensure seal is not twisted when installed.

VALVE GUIDES

Valve guides are part of cylinder head (not replaceable). Measure valve guide oil clearance. See CYLINDER HEAD table under ENGINE SPECIFICATIONS. If not within specification, ream valve guide and install valves with oversize stems.

VALVES

Replace valve if margin is less than 1/32" (.8 mm).

ROCKER ARM ASSEMBLY

Clean push rods, rocker arms, balls and nuts with solvent and blow dry. Inspect rocker arms and balls at mating surface. The surface should be smooth and free of damage. Inspect push rods for bends or wear. Ensure oil passages are clear.

PISTON & ROD ASSEMBLY

1. Mark piston in relation to cylinder bore before removal. Piston pin is press-fitted in connecting rod. Mark piston in relation to connecting rod before separating components.
2. Replace piston and piston pin as matched set. Install piston in bore with notch on top of piston toward front of engine.

FITTING PISTONS

1. Measure piston diameter at 90 degree angle to piston pin, on piston pin centerline. Measure cylinder bore diameter 2 1/2" below cylinder block deck. Determine piston clearance.
2. If piston clearance is not within specification, replace piston and/or machine cylinder bore as necessary. See «CYLINDER BLOCK»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) table and «PISTONS, PINS & RINGS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) table under ENGINE SPECIFICATIONS.

PISTON RINGS

Measure piston ring end gap and side clearance. If not within specification, replace piston and/or rings as necessary. See the PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS. Install rings with mark on ring facing upward. Position ring end gaps around circumference of piston as specified. (Scheme 21)

Scheme 21

ROD BEARINGS

1. Measure rod bearing journal out-of-round, taper and oil clearance. If not within specification, replace rod bearings and/or machine crankshaft. See «CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) table under ENGINE SPECIFICATIONS.
2. Ensure rod side play is within specification. See «CONNECTING ROD»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) table under ENGINE SPECIFICATIONS.

CRANKSHAFT & MAIN BEARINGS

1. Mark bearing caps for reassembly. Measure journal diameter, out-of-round, taper and oil clearance. If not within specification, replace main bearings and/or machine crankshaft. See «CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) table under ENGINE SPECIFICATIONS.
2. Align thrust bearing surfaces and measure crankshaft end play. See THRUST BEARING below. NOTE: The distance between rear main bearing thrust faces on some engines is .008" (.20 mm) wider than standard. When replacing rear main bearings on these engines (identified by .008" stamped on crankshaft rear counterweight), use only .008" (.20 mm) wider bearings.

THRUST BEARING

1. Install main bearing caps (except rear) and tighten cap bolts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h__torque-specifications) . Install rear main bearing cap and tighten cap bolts to 10 ft. lbs. (14 N.m).
2. Tap crankshaft rearward then forward to align thrust surfaces. Tighten rear main bearing cap bolts to specification. Measure crankshaft end play at forward thrust surface of rear main bearing cap. See «CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS»(/chevrolet/cutaway-p30/1985-1997/remont/mechanical/#50l-v8-vin-h) table under ENGINE SPECIFICATIONS.

CYLINDER BLOCK

Measure cylinder bore out-of-round and taper. If not within specification, machine cylinder bore and/or replace piston. See CYLINDER BLOCK table under ENGINE SPECIFICATIONS.

DESCRIPTION

Gear-type oil pump delivers full pressure lubrication through full-flow oil filter to main oil gallery. Main oil gallery feeds crankshaft and camshaft bearings through drilled passages in block.

Valve lifter oil gallery feeds valve lifters. From lifters, oil is routed through hollow push rods to upper valve train components. Timing chain and sprockets are lubricated by oil drainage from No. 1 camshaft bearing. Pistons and piston pins are lubricated by oil splash. Non-adjustable oil pressure regulator is located in oil pump body.

CRANKCASE CAPACITY

See CRANKCASE CAPACITY table.

CRANKCASE CAPACITY (1)

OIL PRESSURE

Measure oil pressure with engine at operating temperature and specified RPM. See OIL PRESSURE SPECIFICATIONS table.

OIL PRESSURE SPECIFICATIONS (1)

ENGINE COOLING

Note. Refer to WATER PUMP under REMOVAL & INSTALLATION in this article.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

GENERAL ENGINE SPECIFICATIONS

GENERAL SPECIFICATIONS

BEARING SPECIFICATIONS

CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS SPECIFICATIONS

CONNECTING ROD SPECIFICATIONS

CONNECTING ROD SPECIFICATIONS

PISTON/PIN/RING SPECIFICATIONS

PISTONS, PINS & RINGS SPECIFICATIONS

CYLINDER BLOCK SPECIFICATIONS

CYLINDER BLOCK SPECIFICATIONS

VALVE/VALVE SPRING SPECIFICATIONS

VALVES & VALVE SPRINGS SPECIFICATIONS

CYLINDER HEAD SPECIFICATIONS

CYLINDER HEAD SPECIFICATIONS

CAMSHAFT SPECIFICATIONS

CAMSHAFT SPECIFICATIONS

See also:
• ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION
• ENGINE IDENTIFICATION
• FUEL PRESSURE RELEASE
• TORQUE SPECIFICATIONS
• VALVE CLEARANCE ADJUSTMENT