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Engine Cooling System: Removal & Installation Oldsmobile Bravada III

Cooling System (Mechanical) 10 illustrations ~1971 words

Installation Procedure

  1. Install the coolant recovery reservoir. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
  2. Install the retaining bolt to the front wheel house panel. Tighten: Tighten the bolt to 12 N.m (106 lb in).
  3. Secure the coolant recovery reservoir to the wheel house panel with the nut. Tighten: Tighten the nut to 10 N.m (88 lb in).
  4. Install the coolant hose to the coolant recovery reservoir (2).
  5. Install the accumulator to the coolant recovery reservoir and secure the accumulator with the bracket and the bolt (1).
  6. Install the air cleaner assembly.
  1. Install the inlet radiator hose clamps to the radiator hose (1).
  2. Install the inlet radiator hose (1) to the radiator.
  3. Reposition the inlet radiator hose clamp using J 38185 .
  4. Install the lower radiator support shield, if equipped. Refer to «RADIATOR SUPPORT SHIELD REPLACEMENT»(ref-191509-S01572464802005091600000) in Frame and Underbody.
  5. Lower the vehicle.
  6. Install the inlet radiator hose to the thermostat (1).
  7. Reposition the inlet radiator hose using J 38185 .
  8. Fill the cooling system. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .
  1. Install the inlet radiator hose clamps (1, 2) to the radiator hose.
  2. Install the inlet radiator hose to the engine.
  3. Reposition the inlet radiator hose clamp (1) using J 38185 .
  4. Install the inlet radiator hose to the radiator.
  5. Reposition the inlet radiator hose clamp (2) using J 38185 .
  6. Fill the cooling system. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .

Removal Procedure

  1. Partially drain the cooling system. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .
  2. Remove the upper radiator baffle. Refer to «AIR INTAKE BAFFLE REPLACEMENT - RADIATOR»(ref-190171-S26501963802005091300000) in Body Front End.
  3. Remove the vent inlet hose from the radiator.
  4. Remove the vent inlet hose from the surge tank.
  1. Install the vent inlet hose to the surge tank.
  2. Install the vent inlet hose to the radiator.
  3. Install the upper radiator baffle. Refer to «AIR INTAKE BAFFLE REPLACEMENT - RADIATOR»(ref-190171-S26501963802005091300000) in Body Front End.
  4. Fill the cooling system. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .

Scheme 34

Scheme 34: Removal Procedure
Scheme 34: Removal Procedure
  1. Remove the cooling fan and shroud. Refer to «Cooling Fan and Shroud Replacement»(ref-191875-S38442111002005091600000) .
  2. Remove the push-pin and release the fan clutch electrical connector from the fan shroud.
  3. Remove the fan clutch from the fan shroud.
  4. Remove the bolts retaining the fan blade to the fan clutch.
  5. Separate the fan blade from the fan clutch.
  1. Assemble the fan blade to the fan clutch. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
  2. Install the 4 bolts to the fan blade. Tighten: Tighten the bolts to 27 N.m (20 lb ft).
  3. Install the fan clutch to the fan shroud.
  4. Install the push-pin to the fan clutch electrical connector.
  5. Install the cooling fan and shroud. Refer to «Cooling Fan and Shroud Replacement»(ref-191875-S38442111002005091600000) .
  1. Install the fan and the shroud onto the lip of the radiator bottom. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
  2. Install the 2 bolts into the upper fan shroud and tighten. Tighten: Tighten the bolts to 28 N.m (21 lb ft).
  3. Connect the electrical connector.
  4. Clip the fan shroud to the radiator at the side panels (1).
  5. Using the J 46406 , secure the water pump pulley, install the fan nut to the water pump shaft in a clockwise rotation. Tighten: Tighten the fan hub nut to 56 N.m (41 lb ft).
  6. Install the transmission cooler lines to the engine and clip into the fan shroud.
  7. Install the hood latch support. Refer to «HOOD LATCH SUPPORT REPLACEMENT»(ref-190171-S14953242532005091300000) in Body Front End.
  8. Install the upper inlet radiator hose to the radiator.
  9. Reposition the upper inlet radiator hose clamp using J 38185 .
  10. Fill the cooling system. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .

Note. Installation of the proper relay is critical. If an enhanced relay - equipped with a diode - is installed into a position requiring a standard relay - equipped without a diode - excessive current will damage any components associated with the relay or its associated circuits.

  1. Install the cooling fan relay (3).
  2. Install the underhood electrical center cover.
  1. Install the thermostat housing to the engine block. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
  2. Install the thermostat housing bolts. Tighten: Tighten the bolts to 10 N.m (89 lb in).
  3. Lubricate the inner diameter of the radiator hose with engine coolant.
  4. Install the outlet hose to the thermostat housing (1). Secure the hose with the clamp.
  5. Install the generator. Refer to «GENERATOR»(ref-167407-S09419884042004101300000) .
  6. Fill the cooling system with specified coolant and concentration. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .
  7. Inspect all sealing surfaces for leaks after starting the engine.

Scheme 35

Scheme 35: Removal Procedure
Scheme 35: Removal Procedure
  1. Disconnect the radiator inlet hose from the water outlet housing. Refer to «Radiator Hose Replacement - Outlet (Body VIN Code 3)»(ref-191875-S39832153062005091600000) .
  2. Remove the power steering pump bracket. Refer to «POWER STEERING PUMP»(ref-132615-S16821103572002012400000) in Power Steering System.
  3. Remove the water outlet housing bolts.
  4. Remove the water outlet housing and seal. Discard the old seal.
  1. Remove any burrs or foreign material from the sealing surface of the engine cylinder head and the water outlet housing.
  2. Install a NEW seal and the water outlet housing. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
  3. Install the water outlet housing bolts. Tighten: Tighten the water outlet bolts to 10 N.m (89 lb in).
  4. Connect the radiator inlet hose to the water outlet housing. Refer to «Radiator Hose Replacement - Outlet (Body VIN Code 3)»(ref-191875-S39832153062005091600000) .
  5. Install the power steering pump bracket. Refer to «POWER STEERING PUMP»(ref-132615-S16821103572002012400000) in Power Steering System.
  1. Install a new water pump gasket. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
  2. Install the water pump and secure the water pump with the bolts. Tighten: On the initial pass, tighten the bolts to 4 N.m (35 lb in). On the final pass, tighten the bolts to 10 N.m (89 lb in).
  3. Install the water pump pulley.
  4. Install the water pump pulley bolts.
  5. Using the J 41240 , secure the water pump pulley while tightening the water pump pulley bolts. Tighten: Tighten the bolts to 25 N.m (18 lb ft).
  6. Remove the J 41240 .
  7. Install the drive belt. Refer to «DRIVE BELT REPLACEMENT»(ref-158534-S30389669122005081800000) in Engine Mechanical - 4.2L.
  8. Install the fan and the shroud. Refer to «Cooling Fan and Shroud Replacement»(ref-191875-S38442111002005091600000) .
  9. Fill the cooling system with the specified coolant and concentration. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .
  10. Inspect for leaks.
  1. Drain cooling system. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .
  2. Use a 1/4 inch drive in order to open and remove the drain cock.
  3. Remove the drain cock.
  1. Install the drain cock. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
  2. Using a 1/4 inch drive tighten the drain cock. Tighten: Tighten the drain cock to 2.0 N.m (18 lb in).
  3. Refill cooling system. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .
  1. Drain the coolant from the radiator. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .
  2. Recover the refrigerant. Refer to «REFRIGERANT RECOVERY AND RECHARGING»(ref-190211-S19191324742005091300000) in Heating, Ventilation and Air Conditioning.
  3. Raise the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-189249) in General Information.
  4. Remove the lower radiator support shield, if equipped. Refer to «RADIATOR SUPPORT SHIELD REPLACEMENT»(ref-191509-S01572464802005091600000) in Frame and Underbody.
  5. Remove the transmission cooler lines from the radiator.
  6. Reposition the outlet radiator hose clamp using J 38185 .
  7. Remove the outlet radiator hose (1).
  8. Lower the vehicle.
  9. Remove the cooling fan and shroud. Refer to «Cooling Fan and Shroud Replacement»(ref-191875-S38442111002005091600000) .
  10. Remove the radiator support diagonal brace. Refer to «BRACE REPLACEMENT - RADIATOR SUPPORT DIAGONAL»(ref-190171-S12646237852005091300000) in Body Front End.
  11. Remove the coolant recovery line from the radiator.
  12. Disconnect the radiator side panels from the shroud (1).
  13. Remove the radiator.
  14. Remove the bolts retaining the condenser to the radiator.
  1. Install the condenser to the radiator. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
  2. Install the bolts retaining the condenser to the radiator. Tighten: Tighten the bolts to 28 N.m (21 lb ft).
  3. Install the radiator.
  4. Install the cooling fan and shroud. Refer to «Cooling Fan and Shroud Replacement»(ref-191875-S38442111002005091600000) .
  5. Raise the vehicle.
  6. Install the outlet radiator hose (1).
  7. Reposition the outlet radiator hose clamp (1) using J 38185 .
  8. Connect the transmission cooler lines to the radiator.
  9. Install the lower radiator support shield, if equipped. Refer to «RADIATOR SUPPORT SHIELD REPLACEMENT»(ref-191509-S01572464802005091600000) in Frame and Underbody.
  10. Lower the vehicle.
  11. Install the coolant recovery hose to the radiator.
  12. Install the radiator support diagonal brace. Refer to «BRACE REPLACEMENT - RADIATOR SUPPORT DIAGONAL»(ref-190171-S12646237852005091300000) in Body Front End.
  13. Fill the cooling system. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .
  14. Inspect the transmission fluid level.

Scheme 36

Scheme 36: Removal Procedure
Scheme 36: Removal Procedure

Scheme 37

Scheme 37
Scheme 37

Scheme 38

Scheme 38
Scheme 38

Scheme 39

Scheme 39
Scheme 39

Scheme 40

Scheme 40
Scheme 40

Scheme 41

Scheme 41
Scheme 41
  1. Drain the engine coolant. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .
  2. Remove the powertrain control module (PCM) retaining bolts (3) and nuts (6).
  3. Remove the PCM mounting studs (5) and position the PCM out of the way.
  4. Disconnect the engine coolant temperature (ECT) sensor electrical connector (1). NOTE: Refer to «FUEL & EVAPORATIVE EMISSION (EVAP) HOSE/PIPE CONNECTION CLEANING NOTICE»(ref-175132-S01404189562005042900000) in Cautions and Notices.
  5. Disconnect the fuel feed (1) and fuel return (2) pipes from the fuel rail. Refer to «FUEL LINE DISCONNECT FITTINGS»(ref-149799-S04525470992002102500000) .
  6. Disconnect the integral clip (3) from the wire harness bracket.
  7. Remove the engine wire harness bracket bolt.
  8. Position the engine electrical wire harness bracket with wires attached out of the way.
  9. Remove the coolant heater cord from the heater (2). IMPORTANT: Do not score the surface of the engine block hole when removing the coolant heater.
  10. Remove the coolant heater from the block.
  1. Remove any burrs, sealer, paint or other foreign material from the threads/sealing surface of the engine block and from the old coolant heater if the heater is to be reused.
  2. If reusing the old coolant heater, apply thread sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the threads. NOTE: Refer to «COMPONENT FASTENER TIGHTENING NOTICE»(ref-175132-S27295026372005041500000) in Cautions and Notices.
  3. Install the coolant heater to the engine block. Tighten: Tighten the coolant heater to 50 N.m (37 lb ft).
  4. Install the coolant heater cord to the heater (2).
  5. Properly position the engine electrical harness bracket to the intake manifold. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
  6. Install the engine electrical harness bracket bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
  7. Connect the integral clip (3) to the wire harness bracket.
  8. Connect the fuel feed (1) and fuel return (2) pipes to the fuel rail. Refer to «FUEL LINE DISCONNECT FITTINGS»(ref-149799-S04525470992002102500000) .
  9. Connect the ECT sensor electrical connector (1).
  10. Install the PCM mounting studs (5) to the intake manifold. Tighten: Tighten the studs to 6 N.m (53 lb in).
  11. Install the PCM (1) onto the studs (5).
  12. Install the PCM retaining bolts (3). Tighten: Tighten the bolts to 8 N.m (71 lb in).
  13. Install the PCM retaining nuts (6). Tighten: Tighten the nuts to 8 N.m (71 lb in).
  14. Fill the cooling system. Refer to «Draining and Filling Cooling System»(ref-191875-S40604209312005091600000) .

Scheme 42

Scheme 42
Scheme 42

Scheme 43

Scheme 43
Scheme 43
  1. If equipped with a 4.2L engine, remove the PCM. Refer to «POWERTRAIN CONTROL MODULE»(ref-149799-S17144126842002102500000) .
  2. Remove the coolant heater cord from the engine harness bracket (1).
  3. Remove the coolant heater cord from the coolant heater (2).
  4. If equipped with a 5.3L engine, disconnect the coolant heater cord from the coolant heater (1).
  5. Remove the coolant heater cord clip from the engine harness.
  6. Disconnect the coolant heater cord retainers (1) from the battery cover.
  1. Connect the coolant heater cord retainers (1) to the battery cover.
  2. If equipped with a 5.3L engine, connect the coolant heater cord to the coolant heater (1).
  3. Install the coolant heater cord clip to the engine harness.
  4. If equipped with a 4.2L engine, install the coolant heater cord to the coolant heater (2).
  5. Install the coolant heater cord to the engine harness bracket (1).
  6. Install the PCM. Refer to «POWERTRAIN CONTROL MODULE»(ref-149799-S17144126842002102500000) .

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