5.0l (307") v8 - VIN [y] Cadillac Brougham I

ENGINE IDENTIFICATION

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

This 5.0L engine may be identified from the Vehicle Identification Number (VIN). The VIN is stamped on a plate, on top of the instrument panel. This plate is visible the through windshield.

The VIN contains 17 characters. The 8th character of the VIN identifies the engine. The 10th character of the VIN identifies the model year (K = 1989) of the vehicle.

All engines are stamped with an engine identification label. This engine identification able will identify the assembly plant, the exact month/date produced, and the engine type code.

ENGINE IDENTIFICATION CODES

Valve Arrangement

I-E-I-E-E-I-E-I (Front-to-rear, both banks).

VALVE CLEARANCE ADJUSTMENT

Valve clearance is nonadjustable. Tighten rocker arms to specifications. See TORQUE SPECIFICATIONS table at end of this article.

TROUBLE SHOOTING

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

GENERAL PRECAUTION

Note. For reassembly reference, label all electrical connectors, vacuum hoses and fuel lines prior to removal. Match mark engine hood and all other major components prior to removal.

Removal

1. Disconnect battery and remove air cleaner. Drain radiator. Disconnect radiator hoses and remove upper fan shroud. Remove fan assembly. Disconnect heater hoses at engine.
2. Remove power steering pump and lay aside. Remove A/C compressor and lay aside. Disconnect accelerator and throttle valve cable. Disconnect cooler lines at radiator. Remove radiator.
3. Disconnect vacuum hoses. Disconnect Computer Command Control (CCC) wiring harness. Disconnect Air Injection Reaction (AIR) hose at pipe from converter. Remove washer bottle. Disconnect engine wiring harness at bulkhead. Disconnect necessary wires. Remove hood.
4. Remove distributor cap. Disconnect cruise control cable. Disconnect battery positive cable to battery and frame. Disconnect battery negative cable at A/C hose bracket and alternator bracket. Raise and support vehicle.
5. Remove crossover pipe and catalytic converter as an assembly. Remove flywheel cover. Remove torque converter bolts. Remove motor mount bolts. Disconnect fuel hose at fuel pump. Disconnect torque converter clutch wiring at transmission.
6. Disconnect transmission cooler lines at clip on engine pan. Remove transmission-to-engine bolts. Lower vehicle. Support transmission. Install lifting device and remove engine.

Installation

To install, reverse removal procedure.

1. Disconnect battery negative cable and drain coolant. Remove air cleaner. Remove AIR crossover pipe. Disconnect upper radiator hose, thermostat by-pass hose and heater hose(s) at rear of manifold. Mark and disconnect fuel and vacuum lines. Disconnect linkage at carburetor. Mark and remove necessary electrical connectors.
2. Remove rear brace from alternator and A/C compressor. Remove EGR valve, idle load compensator and bracket assembly. Remove intake manifold bolts in reverse sequence of installation. (Scheme 1) Remove intake manifold and gaskets. Clean surfaces thoroughly.

Scheme 1

Apply Sealer (1050026) to both sides of intake manifold gasket at all port areas. Apply Sealer (1052915) to both ends of front and rear seals. (Scheme 1) Lubricate entire intake bolts with engine oil. To complete installation, reverse removal procedure. Tighten bolts in sequence to specifications. See TORQUE SPECIFICATIONS table at end of this article.

Removal & Installation

1. Disconnect negative battery cable. Remove air cleaner. On right side, disconnect O2 sensor wire. Raise vehicle. On right side, remove crossover AIR pipe. Separate inlet pipe at exhaust manifold. On right side, remove right front tire, oil filter adapter, gasket, exhaust manifold and gasket.
2. On left side, lower vehicle. Remove exhaust manifold shrouds. Remove lower alternator bracket. Remove exhaust manifold and gasket. To install, reverse removal procedure.

Scheme 2

1. Disconnect negative battery cable. On left side, mark and remove spark plug wires and necessary electrical connectors. Remove anti-dieseling solenoid. Remove alternator belt and rear brace. Loosen exhaust manifold upper shroud only. Remove EGR valve and oil dip stick.
2. On right side, reposition and move heater hoses. Remove PCV valve and hose. Disconnect anti-dieseling solenoid vacuum hoses. Disconnect AIR, O2 sensor and anti-dieseling solenoid. Disconnect canister purge hose. Disconnect hoses to AIR switching valve and catalytic converter pipe. Remove AIR switching valve, AIR/AC belt, AIR pump pulley and A/C compressor rear brace.
3. On both sides, remove valve cover bolts/nuts. Install Valve Cover Seal Breaker (BT-8315 or J-34144) midway between the ends of valve cover, on upper side. (Scheme 2) Tighten screw on seal breaker until a load is applied to valve cover. Place cloth on valve cover and strike with rubber mallet. If cloth is not used to absorb mallet, valve cover will be damaged.

Clean sealing mating surfaces. Apply 1/4" bead of Sealer (1052915) to valve cover. Sealer should be on inner side of bolt holes. Install and tighten valve cover. To complete installation, reverse removal procedure.

Note. Check and record compression before removal. Ensure components are installed to original position and location.

1. Disconnect battery negative cable and drain coolant. Remove intake manifold, exhaust manifold(s) and valve cover(s) as previously described. Disconnect ground cable to cowl. Remove accessories and brackets as necessary.
2. Remove rocker arm bolts, rocker arm pivots, rocker arms and push rods. See previous NOTE. If rear cylinder head bolts and/or push rods can not be removed, remove them with cylinder head. Remove cylinder head bolts, cylinder head and gasket.

Inspection

1. Clean gasket surfaces. Check head and block gasket surface for warpage. Replace cylinder head if more than .006" (.15 mm) needs to be machined from original surface. Check for cracks and replace as necessary. Check head bolts for damage and stretching. Replace as necessary. Tap threads on bolts and in block.
2. Clean push rods in solvent and blow out oil passage with compressed air. Check ends of push rod for excessive wear and runout. If runout exceeds .015" (.38 mm), replace push rod. Apply Molykote to rocker arm contact points and push rod ends during installation.

Note. DO NOT use any sealant on head gaskets.

Properly install head gasket onto dowel pins. Install cylinder head over dowel pins and gasket. Dip head bolt threads in engine oil and allow to drain. Install head bolts. Tighten in sequence to specifications. See TORQUE SPECIFICATIONS table at end of this article. To complete installation, reverse removal procedure.

Scheme 3

1. Disconnect negative battery cable. Drain cooling system and remove radiator. Remove A/C and power steering assembly with hoses attached and set aside. Remove cooling fan and pulley. Remove crankshaft balancer hub (damper) with Balancer Puller (J-8614).
2. Remove front timing cover seal, if cover does not require removal, with an inside 3-finger type puller. Remove fuel pump (if removing cover). Remove front timing cover retaining bolts/studs. Remove timing indicator. Remove front timing cover and water pump as an assembly. (Scheme 4) Remove dowel pins.

Scheme 4

Scheme 5

1. If front timing cover was not removed, install seal with Seal Installer (BT-6405 or J-25264) until proper clearance between installer and cover is achieved. (Scheme 5)
2. If front timing cover was removed, trim protruding oil pan gasket material flush with engine. Apply Sealer (1050026) around coolant holes in new cover gasket and place gasket on block. Trim 1/8" from each end of cover-to-oil pan saddle seal.
3. Apply Sealer (1052915) to joining corners of engine block, oil pan and saddle seal. Glue oil pan saddle seals in place on timing cover. Position bottom of cover with saddle seal to oil pan. Press down to compress saddle seal. Using a small screwdriver, guide saddle seal edges into cavity while installing timing cover.
4. Oil timing cover retaining bolts and install 2 bolts finger tight. Install dowel pins, chamfer end first. To complete installation, reverse removal procedure.

Scheme 6

1. Remove front timing cover as previously described. Remove fuel pump eccentric. (Scheme 4) Align timing marks on camshaft and crankshaft gears. (Scheme 6)
2. Remove camshaft gear and chain as an assembly. Remove crankshaft gear with a puller (if replacing). To install, reverse removal procedure. With camshaft and crankshaft gear marks aligned, No. 6 cylinder is at TDC on compression stroke. (Scheme 6)

CAMSHAFT

Note. Engine must be removed to install camshaft bearings. Ensure oil holes in bearings and block are aligned.

1. Remove timing chain and gears as previously described. Discharge A/C system and remove A/C condenser. Remove intake manifold and valve covers as previously described. Remove distributor cap with plug wires. Mark and remove rocker arms, pushrods and lifters.
2. Remove camshaft retainer plate. Remove flange adapter. (Scheme 4) Pull camshaft out of engine. If installing new camshaft add EP Lubricant (1051396) to engine oil. To install, reverse removal procedure. Use EP lubricant on components during installation.

Check bearing and lobe surfaces for wear, galling, gouges and discoloration (overheating). Measure lobe lift, bearing journal runout and diameter with camshaft in "V" block. Replace as necessary. See ENGINE SPECIFICATIONS tables at end of article.

Rear main bearing oil seal is a 2 piece rope seal. The lower portion may be replaced with engine in vehicle. Crankshaft removal is required for replacing upper portion. Use Seal Installer (J-25285 or BT-7923) to install seal. Cut excess seal material flush. Apply Sealer (1050026) to the main bearing cap as shown. (Scheme 7)

Scheme 7

Disconnect negative battery. Drain cooling system. Remove necessary accessories and brackets. Remove fan and pulley. Disconnect lower radiator hose and heater hoses from water pump. Remove water pump retaining bolts and remove water pump. (Scheme 4) Apply Sealer (10500026) to new gasket and place on water pump. To complete installation, reverse removal procedure.

Note. For further information on cooling systems, see ENGINE COOLING section.

1. Disconnect negative battery cable and remove air cleaner and fan shroud. Remove upper fan shroud. Raise vehicle and drain crankcase. Remove cruise control servo bracket (if equipped).
2. Remove Air Injection Reaction (AIR) hose-to-converter pipe. Remove AIR pipe-to-exhaust manifold. Remove the exhaust crossover pipe at manifold and converter. Remove starter and flywheel access cover. Disconnect transmission lines at oil pan. Remove engine mount through bolts.
3. Remove oil pan bolts and lower pan. Position front crankshaft throw and/or counterweight on horizontal plane so it does not interfere with oil pan removal. Raise engine, reinstall through bolts and remove oil pan.

Remove oil pan. See appropriate OIL PAN REMOVAL section. Remove oil pump retaining bolts and remove oil pump. To install, reverse removal procedure. See INSPECTION under OIL PUMP at end of this article.

Scheme 8

Note. Keep components together and marked to ensure installation to original location and position.

Valve Seal, Springs & Rotators

These may be replaced with cylinder head installed using compressed air method. Intake and exhaust seals are not interchangeable. Intake seals are Gray and exhaust seals are Ivory. (Scheme 8)

Valve Guides

Check and service guides prior to valve and seat service. Guide replacement information not available from manufacturer. Valve guides may be reamed .003" (.08 mm) oversize and an oversized valve installed.

Valve Seat

Valve seat replacement information not available from manufacturer. An oscillating type valve grinder is preferred. If after grinding seat is too wide, use a 20 degree stone to lower seat and 70 degree stone to raise seat. If seats are serviced, valves also must be serviced or replaced.

Valves

After valve service, measure valve stem and rotator height as shown. (Scheme 9) There should be.015" (.38 mm) clearance between valve stem and gauge. Clearance between valve rotator and valve stem must be greater than.005" (.13 mm). If not within specifications, replace components as necessary.

Scheme 9

Hydraulic Roller Lifters

If new lifters are installed, add Conditioner (1052367) to engine oil. Some engines may have both standard and.010" (.25 mm) oversize lifters. Lifters are marked on the side with an "O" if oversized. The outside of lifter bore in cylinder block is also marked with an "O" if oversized. Ensure guide and retainer are installed properly. (Scheme 10)

Scheme 10

Check bearing surfaces and lobes for wear, galling, gouges and discoloration (overheating). Measure lift, bearing journal diameter and runout. Replace camshaft if not within specifications. See ENGINE SPECIFICATIONS tables at end of this article. If bearings are replaced, ensure oil holes are properly aligned. If installing new camshaft, add EP Lubricant (1051396) to engine oil.

CYLINDER BLOCK ASSEMBLY

Note. Keep components together and marked to ensure installation to original location and position.

Cylinder Block

1. Using a straightedge and feeler garage, check cylinder block head gasket surface for warpage. If more than .005" (.13 mm) of metal must be removed, replace cylinder block.
2. Check cylinder bore for wear, taper, out-of-round and piston fit. Machine or replace as necessary. See «ENGINE SPECIFICATIONS»(/cadillac/brougham/i-1987-1992/remont/mechanical/#50l-307-v8-vin-y__engine-specifications) tables at end of this article.

Piston & Rod Assembly

Mark rod and rod cap with matching cylinder number. Match mark piston-to-rod prior to disassembly for reassembly reference. Notch on top of piston faces front of engine. Pin is retained by 2 retainers. No special tools needed for pin removal. Check piston ring end gap and side clearance. Properly install the rings onto the piston. (Scheme 11)

Scheme 11

Fitting Pistons

Production and service pistons have same nominal weight and can be intermixed without affecting engine balance. DO NOT cut oversized pistons down as balance will be affected.

Crankshaft & Bearings

Bearings are marked with amount of undersize on the opposite end of the tang or else the tang will be marked with a letter. Refer to the BEARING IDENTIFICATION table in this article. DO NOT mix standard and undersize bearings. Seat the thrust bearing prior to tightening the main bearing caps. Refer to CRANKSHAFT THRUST BEARING under CYLINDER BLOCK ASSEMBLY in this article.

BEARING IDENTIFICATION

Crankshaft Thrust Bearing

Install main bearing caps. See CAUTION under FITTING PISTONS. Tighten main bearing caps to 11 ft. lbs. (15 N.m). Using a block of wood and hammer, bump crankshaft in each direction to align thrust flanges. (Scheme 12)

Scheme 12

Lubrication System

A gear-type oil pump provides full pressure lubrication through full flow oil filter. Oil pump is bolted to bottom of cylinder block, inside oil pan. A drive shaft is splined into the distributor and oil pump. Distributor is camshaft driven.

Crankcase Capacity

Crankcase capacity is 4 qts. (4.8L) without oil filter and 5 qts. (4.7L) with oil filter.

Normal Oil Pressure

Oil pressure is minimum 30 psi (2.1 kg/cm 2 ) at 1500 RPM.

Oil Pump Inspection

Check oil pump as shown. (Scheme 13) Check outside diameter and width of gears. If not within specifications, replace components as necessary. See OIL PUMP SPECIFICATIONS table.

OIL PUMP SPECIFICATIONS

Scheme 13

Scheme 14

Scheme 15

Scheme 16

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

ENGINE SPECIFICATIONS

GENERAL SPECIFICATIONS

PISTONS, PINS & RINGS SPECIFICATIONS

CRANKSHAFT MAIN & CONNECTING ROD BEARINGS SPECS

CONNECTING ROD SPECIFICATIONS

CYLINDER HEAD SPECIFICATIONS

CYLINDER BLOCK SPECIFICATIONS

VALVES & VALVE SPRINGS SPECIFICATIONS

CAMSHAFT SPECIFICATIONS

See also:
• ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION
• TORQUE SPECIFICATIONS
• ENGINE SPECIFICATIONS
• OIL PUMP
• CYLINDER BLOCK ASSEMBLY