GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Engine

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REMOVAL & INSTALLATION



In the process of removing the engine, you will come across a number of steps which call for the removal of a separate component or system, such as "disconnect the exhaust system" or "remove the radiator." In most instances, a detailed removal procedure can be found elsewhere in this guide.

It is virtually impossible to list each individual wire and hose which must be disconnected, simply because so many different model and engine combinations have been manufactured. Careful observation and common sense are the best possible approaches to any repair procedure.

Removal and installation of the engine can be made easier if you follow these basic points:



If you have to drain any of the fluids, use a suitable container.
 
Before disconnecting them, always tag any wires or hoses. In addition, tag the components they came from.
 
Because there are so many bolts and fasteners involved, store, and label the retainers from components separately in muffin pans, jars, or coffee cans. This will prevent confusion during installation.
 
After unbolting the transmission or transaxle, always make sure it is properly supported.
 
If it is necessary to disconnect the air conditioning system, have this service performed by a qualified technician using a recovery/recycling station. If the system does not have to be disconnected, unbolt the compressor and set it aside.
 
When unbolting the engine mounts, always make sure the engine is properly supported. When removing the engine, make sure that any lifting devices are properly attached to the engine. It is recommended that if your engine is supplied with lifting hooks, your lifting apparatus be attached to them.
 
Lift the engine from its compartment slowly, checking that no hoses, wires, or other components are still connected.
 
After the engine is clear of the compartment, place it on an engine stand or workbench.
 
After the engine has been removed, you can perform a partial or full teardown of the engine using the procedures outlined in this guide.
 

3.0L Engine

NOTE
If your vehicle is equipped with air conditioning, refer to the information regarding the implications of servicing your A/C system yourself. Only an MVAC-trained, EPA-certified, automotive technician should service the A/C system or its components.


CAUTION
Never open, service, or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. In addition, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

  1. Disconnect the negative battery cable.
  2.  
  3. Drain and recycle the engine coolant.
  4.  
  5. Recover the refrigerant.
  6.  
  7. Remove the wiper arms.
  8.  
  9. Remove the left and right side air inlet grilles.
  10.  
  11. Remove the hood, the battery, the black wiring harness connector, and the body ground wire from the battery negative cable end.
  12.  


NOTE
Ensure the wire is marked for identification to prevent improper re-installation.

  1. Disconnect the four power supply wires from the battery positive cable end.
  2.  


NOTE
Ensure the wires are marked for identification to prevent improper re-installation.


NOTE
Siphon the power steering fluid from the power steering reservoir.

  1. Disconnect the power steering suction hose and clamp. The power steering discharge hose from the power steering pump.
  2.  
  3. Disconnect the brake booster threaded fitting from the intake plenum.
  4.  
  5. Disconnect the vacuum hoses from the brake power booster hose.
  6.  


NOTE
Tag the hoses to aid in re-assembly.

  1. Remove the intake plenum switchover valve vacuum and electrical connections.
  2.  
  3. Remove the intake plenum switchover valve bolts, and the intake plenum switchover valve.
  4.  
  5. Switchover valve is removed to prevent damage to the valve from the chain when removing the engine.
  6.  
  7. Remove the PCM.
  8.  
  9. Remove the wiring harness from the electrical center box.
  10.  


NOTE
It will be necessary to unhook relays from the electrical center box to remove the wiring harness.

  1. Detach the blue and white wiring harness connectors.
  2.  
  3. Unhook the accelerator cable-retaining clip, and remove the accelerator cable from the throttle body.
  4.  
  5. Unhook the cruise control cable-retaining clip, and remove the cruise control cable from the throttle body.
  6.  
  7. Properly relieve the fuel system pressure.
  8.  
  9. Disconnect the fuel supply hose, and the fuels return hose. Counterhold the connection to prevent damage to the fuel rail.
  10.  
  11. Disconnect the coolant return hose and clamp from the throttle body.
  12.  
  13. Disconnect the vacuum hose from the purge valve located on the engine ventilation chamber.
  14.  
  15. Disconnect the vacuum from the hot water control valve.
  16.  
  17. Remove the coolant reservoir hose and clamp from the coolant intake pipe.
  18.  
  19. Undo the heater hose quick disconnects.
    1. Pull back on the sleeve to unlock, then carefully pull back to remove.
    2.  
    3. Tabs on the quick disconnects break easily, use caution.
    4.  

  20.  
  21. Remove the heater hoses from the heater core connection.
  22.  
  23. Remove the resonance chamber.
    1. Detach the MAF and the IAT sensors electrical connector.
    2.  
    3. Disconnect the resonance chamber air intake hose from the air cleaner housing and from the MAF sensor.
    4.  
    5. Remove the IAC inlet hose clamp, the IAC inlet hose, and the intake plenum air inlet hoses.
    6.  
    7. Detach the electrical connector from the switchover valve and the remaining vacuum connections.
    8.  
    9. Remove the resonance chamber nuts and the resonance chamber.
    10.  

  24.  
  25. Remove the radiator, and the A/C compressor/condenser hose bracket screws from the body, the A/C compressor/condenser hose bracket and pull it aside.
  26.  


NOTE
Repositioning of the A/C compressor/condenser hose will aid in engine removal clearances.

  1. Remove the quick-connect for the A/C compressor hose from the A/C compressor/condenser hose.
  2.  
  3. Remove the quick-connect for the A/C compressor hose from the A/C evaporator line extension.
  4.  
  5. Install a suitable engine support bracket across the top of the engine.
  6.  


NOTE
Support the engine to provide engine stability. The two silicone-filled engine mounts will not provide sufficient support to the engine to prevent it from falling forward or backward after the transmission is removed.

  1. Raise and safely support the vehicle securely.
  2.  
  3. Remove the splash shield bolts and splash shield.
  4.  
  5. Unplug the A/C compressor electrical connector.
  6.  
  7. Remove the transmission.
  8.  
  9. Lower the vehicle, and connect suitable engine lift chains to the three support lift shackles.
  10.  
  11. When the engine lift has assumed the weight of the engine, remove the engine support bracket.
  12.  
  13. Unbolt the engine mount nuts and remove the engine.
  14.  

To install:

  1. Install the engine and the engine mount nuts. Tighten the nuts to 41 ft. lbs. (55 Nm).
  2.  
  3. Install the engine support bracket.
  4.  
  5. Remove the engine lift chains from the three support lift shackles.
  6.  
  7. Raise and safely support the vehicle securely.
  8.  
  9. Install the transmission.
  10.  
  11. Plug in the A/C compressor electrical connector.
  12.  
  13. Replace the splash shield and splash shield bolts. Tighten the splashed shield bolts until fully seated and not stripped.
  14.  
  15. Lower the vehicle.
  16.  
  17. Remove the engine support bracket.
  18.  
  19. Couple the quick-connect for the A/C compressor hose to the A/C evaporator line extension.
  20.  
  21. Couple the quick-connect for the A/C compressor hose to the A/C compressor/condenser hose.
  22.  
  23. Reposition the A/C compressor/condenser hose bracket, attach the A/C compressor/condenser hose bracket screws to the body. Tighten the bolts to 71 inch lbs. (8 Nm).
  24.  
  25. Install the radiator.
  26.  
  27. Install the resonance chamber.
    1. Insert the resonance chamber guide pin into the rubber mount.
    2.  
    3. Tighten the resonance chamber nuts to 27 inch lbs. (3 Nm).
    4.  
    5. Install the electrical connector switchover valve and the remaining vacuum hoses.
    6.  
    7. Install the intake plenum air inlet hoses, the IAC inlet hose, and the clamp.
    8.  
    9. Install the resonance chamber air intake hose to the air cleaner housing and the MAF sensor.
    10.  
    11. Connect the IAT and MAF sensors electrical connectors.
    12.  

  28.  
  29. Couple the heater hoses to the heater core connections.
  30.  


NOTE
Ensure that the quick-disconnects are fully seated and that the retaining sleeves are pushed to the locked position.

  1. Secure the coolant reservoir hose and clap to the coolant intake pipe.
  2.  
  3. Connect the vacuum hose to the hot water control valve, and any other vacuum hose that was disconnected during the removal process.
  4.  
  5. Connect the coolant return hose and clamp to the throttle body.
  6.  
  7. Secure the fuel supply hose. Tighten the hose connection to 11 ft. lbs. (15 Nm).
  8.  


NOTE
Counterhold the connection to prevent damage to the fuel rail.

  1. Secure the fuel return hose. Tighten the hose connection to 11 ft. lbs. (15 Nm).
  2.  


NOTE
Counterhold the connection to prevent damage to the fuel rail.

  1. Hook the accelerator cable-retaining clip, and the accelerator cable to the throttle body.
  2.  
  3. Hook the cruise control cable-retaining clip, and the cruise control cable to the throttle body.
  4.  
  5. Connect the blue and white wiring harness connectors.
  6.  
  7. Connect the wiring harness to the electrical center box, and install the PCM.
  8.  
  9. Install the intake plenum switchover valve and tighten the bolts to 71 inch. lbs. (8 Nm).
  10.  
  11. Connect the intake plenum switchover valve vacuum and electrical connections.
  12.  
  13. Connect the power steering pump discharge hose to the power steering pump. Tighten the connection to 21 ft. lbs. (28 Nm).
  14.  
  15. Connect the two vacuum hoses to the brake power booster line and install the brake booster threaded fitting. Tighten the brake booster fitting until fully seated and not stripped.
  16.  
  17. Install the power steering suction hose and clamp.
  18.  
  19. Connect the four power supply wires to the battery positive cable end.
  20.  
  21. Install the black wiring harness connector, the body ground wire to the battery negative cable end, and install the battery.
  22.  
  23. Install and align the hood.
  24.  
  25. Install the left and right side air inlet grilles, reattach the wiper arms.
  26.  
  27. Connect the negative battery cable.
  28.  
  29. Fill and bleed the cooling system.
  30.  
  31. Fill the power steering reservoir with the proper fluid type.
  32.  
  33. Recharge and leak check the A/C system.
  34.  

4.5L and 4.9L Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Drain and recycle the engine coolant.
  4.  
  5. Remove the air cleaner. Matchmark the hood to the support brackets and remove the hood.
  6.  


NOTE
If your vehicle is equipped with air conditioning, refer to the information regarding the implications of servicing your A/C system yourself. Only a MVAC-trained, EPA-certified, automotive technician should service the A/C system or its components.

  1. If equipped with air conditioning, perform the following procedures:
    1. Remove the hose strap from the right-strut tower.
    2.  
    3. Remove the accumulator from its bracket and position it aside.
    4.  
    5. Remove the canister hoses from the accumulator bracket.
    6.  
    7. Remove the accumulator bracket from the wheelhouse.
    8.  

  2.  
  3. Remove the cooling fans, the accessory drive belt, the radiator and heater hoses.
  4.  
  5. Label and detach the electrical connectors from the following items:
    1. Oil pressure switch
    2.  
    3. Coolant temperature sensor
    4.  
    5. Distributor
    6.  
    7. EGR solenoid
    8.  
    9. Engine temperature switch
    10.  

  6.  
  7. Label and disconnect the cables from the following items:
    1. Accelerator
    2.  
    3. Cruise control linkage
    4.  
    5. Transaxle Throttle Valve (TV) cable
    6.  

  8.  
  9. If equipped with cruise control, remove the diaphragm with the bracket attached and move it aside.
  10.  
  11. Remove the vacuum supply hose and the exhaust crossover pipe.
  12.  
  13. Disconnect the oil cooler lines from the oil filter adapter, the oil line cooler bracket from the transaxle and position them aside.
  14.  
  15. Remove the air cleaner mounting bracket.
  16.  
  17. Properly relieve the fuel system pressure.
  18.  
  19. Disconnect the fuel lines from the throttle body. Remove the fuel lines bracket from the transaxle and secure the fuel lines aside.
  20.  
  21. Remove the small vacuum line from the brake booster.
  22.  
  23. Label and detach the AIR solenoid electrical and hose connections. Remove the AIR valves with the bracket.
  24.  
  25. Label and detach the electrical connectors from the following:
    1. Idle Speed Control (ISC) motor
    2.  
    3. Throttle Position Switch (TPS)
    4.  
    5. Fuel injectors
    6.  
    7. Manifold Air Temperature (MAT) sensor
    8.  
    9. Oxygen sensor
    10.  
    11. Electric Fuel Evaporation (EFE) grid
    12.  
    13. Alternator bracket
    14.  

  26.  
  27. Remove the power steering pump hose strap and the stud-headed bolt from in front of the right cylinder head.
  28.  
  29. Remove the AIR pipe clip located near the No. 2 spark plug, if equipped.
  30.  
  31. Remove the power steering pump and belt tensioner with bracket attached; wire them aside.
  32.  
  33. Raise and safely support the vehicle.
  34.  
  35. Label and detach the electrical connectors from the starter and the ground wire from the cylinder block.
  36.  
  37. Remove the two flywheel covers. Remove the starter-to-engine bolts and the starter. Matchmark the flywheel-to-torque converter location. Remove the three flywheel-to-torque converter bolts and slide the converter back into the bell housing.
  38.  
  39. If equipped with air conditioning, perform the following procedures:
    1. Remove the compressor lower dust shield.
    2.  
    3. Remove the right front wheel/tire assembly and outer wheelhouse plastic shield.
    4.  
    5. Remove the compressor-to-bracket bolts and lower the compressor from the engine. Do not disconnect the refrigerant lines.
    6.  

  40.  
  41. Remove the lower radiator hose.
  42.  
  43. From the lower right front of the Engine and cradle, remove the driveline vibration damper with the brackets, if equipped, and the engine-to-transaxle bracket bolts. Pull the alternator wire with the plastic cover down and aside.
  44.  
  45. Remove the exhaust pipe-to-manifold bolts with the springs attached and the AIR pipe-to-converter bracket from the exhaust manifold stud.
  46.  


NOTE
Be careful not to lose the springs when detaching the exhaust pipe.

  1. Remove the lower right side bell housing-to-engine bolt. Lower the vehicle.
  2.  
  3. Using a vertical Engine hoist, attach it to the Engine and support it.
  4.  
  5. Remove the upper bell housing-to-engine bolts and left front Engine mount bracket-to-engine bolts. Remove the Engine from the vehicle.
  6.  

To install:

  1. Raise the transaxle with a separate jack to engage the engine.
  2.  
  3. Install the engine into the vehicle, using a suitable Engine hoist. Engage the dowels on the block with the transaxle case.
  4.  
  5. Install the transaxle bell housing-to-engine mounting bolts.
  6.  
  7. Lower and remove the floor jack assembly from the transaxle.
  8.  
  9. Lower the engine, making sure it is seated on the mount properly.
  10.  
  11. Remove the engine hoist. Raise and safely support the vehicle.
  12.  
  13. Lower the right hand transaxle bell housing-to-engine bolt. Support the engine.
  14.  
  15. Install the left front engine mount bracket-to-engine bolts and the flexplate-to-converter bolts.
  16.  
  17. Replace the flexplate covers.
  18.  
  19. Install the starter motor and connect the electrical wires to the starter.
  20.  
  21. Connect the AIR pipe-to-converter bracket to the exhaust manifold stud.
  22.  
  23. Install the exhaust pipe to manifold bolts and springs.
  24.  
  25. Connect the alternator and install the plastic cover. Install the right front engine-to-transaxle bracket and tighten the bolts to 30 ft. lbs. (41 Nm).
  26.  
  27. Install the lower radiator hose and replace the air conditioning compressor mounting bolts.
  28.  
  29. Install the air conditioning compressor lower dust shield and the outer wheel house plastic shield.
  30.  
  31. Install the right front tire and wheel assembly.
  32.  
  33. Lower the vehicle.
  34.  
  35. Install the power steering pump and the belt tensioner. Replace the stud headed bolt.
  36.  
  37. Install the power steering hose strap to the stud headed bolt in front of the cylinder head.
  38.  
  39. Connect the electrical connectors to the following:
    1. Idle Speed Control (ISC) motor
    2.  
    3. Throttle Position Switch (TPS)
    4.  
    5. Fuel injectors
    6.  
    7. Manifold Air Temperature (MAT) sensor
    8.  
    9. Oxygen sensor
    10.  
    11. Electric Fuel Evaporator (EFE) grid
    12.  
    13. Alternator bracket
    14.  

  40.  
  41. Replace the air valve and bracket. Connect the air solenoid electrical and hose connections.
  42.  
  43. Connect the vacuum line to the brake booster.
  44.  
  45. Connect the fuel lines at the throttle body and replace the fuel line bracket at the transaxle.
  46.  
  47. Replace the air cleaner mounting bracket and connect the oil cooler lines to the oil filter adapter.
  48.  
  49. Connect the oil cooler line bracket at the transaxle. Replace the exhaust crossover pipe.
  50.  
  51. Replace the cruise control diaphragm and connect the vacuum line.
  52.  
  53. Connect the accelerator, cruise control and the transaxle throttle valve cables to the throttle lever.
  54.  
  55. Connect the wire connectors to the following:
    1. Oil pressure switch
    2.  
    3. Coolant temperature sensor
    4.  
    5. Distributor
    6.  
    7. EGR solenoid
    8.  
    9. Engine temperature switch
    10.  

  56.  
  57. Replace the accessory drive belt, heater hoses, and upper radiator hose.
  58.  
  59. Install the cooling fans and connect the air conditioning accumulator bracket.
  60.  
  61. Install the air conditioning accumulator and connect the wires and hoses.
  62.  
  63. Install the hood assembly and replace the air cleaner.
  64.  
  65. Refill the Engine coolant. Connect the negative battery cable.
  66.  
  67. Start the engine, allow it to reach normal operating temperatures and check for leaks.
  68.  

4.6L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner inlet duct.
  4.  
  5. Matchmark the hood hinge-to-hood and remove the hood.
  6.  
  7. Drain the coolant from the radiator.
  8.  
  9. Remove the left and right torque struts. Install the left front strut bolt back into the bracket.
  10.  
  11. Disconnect the radiator hoses at the water crossover. Remove both cooling fans from the engine.
  12.  
  13. Remove the serpentine accessory drive belt.
  14.  
  15. Detach the cruise control servo connections and the ISC motor electrical connector.
  16.  
  17. Disconnect the throttle cable from the throttle body cam. Disconnect the shift cable from the park/neutral switch. Remove the cable bracket at the transaxle.
  18.  
  19. Remove the park/neutral switch and disconnect the power brake vacuum hose.
  20.  
  21. At the rear of the right head, disconnect the cylinder head temperature switch.
  22.  
  23. Remove the bellhousing bolts.
  24.  
  25. Remove the ignition coils and remove the spark plug wires.
  26.  
  27. Raise and safely support the vehicle.
  28.  
  29. Remove the oil pan-to-transmission brace. Remove the torque converter splash shield and the four converter-to-flywheel bolts.
  30.  
  31. Disconnect the oil cooler lines from the oil filter adapter.
  32.  
  33. Remove the A/C compressor mounting bolts and detach the electrical connectors. Move compressor out of way.
  34.  
  35. Detach the electrical connectors from the left side of the engine and move the harness from behind the exhaust manifold.
  36.  
  37. Remove the two nuts that secure the motor mount to the engine cradle front crossmember.
  38.  
  39. Remove the exhaust Y-pipe and remove the right front wheel.
  40.  
  41. Remove the crankcase to transmission bracket at the transmission tail shaft. Disconnect the knock sensor.
  42.  
  43. Remove the bolt from the transmission to the cylinder head brace at the cylinder head.
  44.  
  45. Lower the vehicle. Disconnect the fuel inlet and fuel return lines using special tool J37088 or equivalent.
  46.  
  47. Detach the injector harness connector and the hoses from the coolant reservoir. Remove the reservoir.
  48.  
  49. Disconnect the cam position sensor. Disconnect the heater hoses from the water pipes at the front of the right cylinder head.
  50.  
  51. Disconnect the battery cable from the junction block and remove the retainer at the cylinder head.
  52.  
  53. Disconnect the starter cable from the junction block.
  54.  
  55. Disconnect the power steering pump pressure and return lines at the pump. Return power steering line retainer from the right front of the crankcase.
  56.  
  57. Disconnect the rear oxygen sensor.
  58.  
  59. Remove the three screws securing the wiring harness retainer to right cam cover and position harness out of the way.
  60.  
  61. Connect an engine-lifting device to the engine using the support hooks at left and right rear of engine. The torque strut bracket at the left front of the engine should be used as a third lifting hook.
  62.  
  63. Carefully remove the engine from the vehicle.
  64.  

To install:

  1. Lower the engine into the vehicle. Remove the lifting device.
  2.  
  3. Install the 4 bell housing bolts and tighten to 75 ft. lbs. (100 Nm).
  4.  
  5. Raise and safely support the vehicle.
  6.  
  7. Install 2 nuts to the motor mount at the front cradle crossmember. Do not fully tighten.
  8.  
  9. Install bolt to the cylinder head for transmission brace. Do not fully tighten.
  10.  
  11. Install the transmission to crankcase bracket with the 4 bolts. Do not fully tighten the bolts.
  12.  
  13. Tighten the motor mount to cradle crossmember bolts to 30 ft. lbs. (40 Nm). Tighten the transmission brace bolt and transmission to crankcase bolts to 45 ft. lbs. (60 Nm).
  14.  
  15. Install the right front wheel and connect the knock sensor.
  16.  
  17. Install the exhaust Y-pipe.
  18.  
  19. Install the 4 torque converter to flywheel bolts and tighten to 45 ft. lbs. (60 Nm).
  20.  
  21. Install the converter splash shield and install the transmission to oil pan brace. Tighten the bolt to 35 ft. lbs. (50 Nm).
  22.  
  23. Position the A/C compressor in place and install the mounting bolts.
  24.  
  25. Route the electrical harness along the left side of the engine and connect the connectors.
  26.  
  27. Connect the oil cooler lines to the oil filter adapter.
  28.  
  29. Lower the vehicle.
  30.  
  31. Secure the wiring harness to the right cam cover with the 3 screws.
  32.  
  33. Connect the rear oxygen sensor and connect the cam position sensor.
  34.  
  35. Connect the power steering hoses to the pump and secure the return line to the crankcase.
  36.  
  37. Connect the heater hoses to the water pipes.
  38.  
  39. Connect the starter and battery cables at the junction box. Secure battery cable with retainer.
  40.  
  41. Connect and install the coolant reservoir.
  42.  
  43. Install coils and secure with 4 screws.
  44.  
  45. Install the serpentine drive belt and connect the injector harness to the FIS harness.
  46.  
  47. Connect the fuel line connectors. Connect the cylinder head temperature switch to the rear of the right head.
  48.  
  49. Connect the power brake vacuum line.
  50.  
  51. Install the park/neutral switch and shift cable. Adjust switch if necessary.
  52.  
  53. Install the cruise servo and connect the ISC motor.
  54.  
  55. Connect the throttle cable and install both cooling fans.
  56.  
  57. Connect the radiator hoses to the water crossover.
  58.  
  59. Install the torque struts and adjust the preload to zero.
  60.  
  61. Connect the negative battery cable.
  62.  
  63. Refill the engine with coolant. Install the hood and install the air cleaner.
  64.  
  65. Start the engine and check for oil, coolant, or transaxle leaks.
  66.  

 
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