GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Cylinder Head

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REMOVAL & INSTALLATION



3.0L Engine
LEFT Cylinder Head
  1. Disconnect the negative battery cable.
  2.  
  3. Drain and recycle the engine coolant.
  4.  
  5. Remove the resonance chamber.
  6.  
  7. Remove the intake manifold and manifold spacer. It is also necessary to remove the coolant bridge.To remove the coolant bridge.

    Detach the electrical connectors from the engine coolant temperature sender and sensor.
     
    The throttle body and heater inlet hoses must be removed from the bridge.
     
    Unscrew the engine coolant temperature sender and the engine coolant temperature sensor and seal, if necessary.
     
    Disconnect the throttle body inlet hose fitting, if necessary.
     
    Remove the engine coolant bridge bolts and upper seals, then remove the engine coolant bridge and lower seals.
     

  8.  
  9. Remove the LH valve cover.
  10.  
  11. Remove the front timing belt cover and belt.
  12.  


NOTE
It is important to position the crankshaft to 60 degrees before Top Dead Center (TDC) to ensure there will not be contact between the valves and pistons during reinstallation of the cylinder head. Rotate the crankshaft counterclockwise to the 60 degrees BTDC position to prevent valve/piston contact should the camshaft move.

  1. Remove the timing belt tensioner bracket.
  2.  
  3. To remove the camshaft gears.
    1. Remove the camshaft gear bolt.
    2.  

  4.  


NOTE
Insert the special tools J 42069-1 and J 42069-2 into the appropriate camshaft gears, this will hold the gears in place while removing the bolt.

  1. Remove the camshaft gears for the intake and exhaust camshafts 3 and 4, then 1 and 2.
  2.  

  1. Remove the water pump.
  2.  
  3. Remove the rear timing belt cover.
    1. Remove the camshaft gears as described above.
    2.  
    3. Remove the timing belt tensioner bracket bolts. Remove the timing belt tensioner bracket with the rollers attached.
    4.  
    5. Remove the timing belt idler pulley bolt for camshafts 3 and 4.
    6.  
    7. Remove the water pump bolts and the water pump.
    8.  
    9. Unbolt the rear timing belt cover bolts and threaded pin, and remove the rear timing belt cover.
    10.  

  4.  
  5. Detach the camshaft sensor electrical connection.To remove the exhaust camshaft (#4).

    Rotate the crankshaft counterclockwise to 60 degrees BTDC with tool 'J 42098' or equivalent. In this position, the pistons are free from valve contact.
     
    Remove the relevant camshaft gear. The pin on the crankshaft should be pointing in approximately the 12 o'clock position. Ensure the camshaft is not under load from the lifters.
     
    Detach the camshaft sensor electrical connection.
     
    Loosen the camshaft bearing cap bolts sequentially starting from the center and moving outwards in a spiral direction.
     
    Remove the camshaft bearing caps. Note the code marks on the bearing caps for proper reinstallation.
     
    Remove the camshaft with the seal attached. Remove the camshaft seal.
     

  6.  
  7. Unbolt the coolant pipe/engine lift bracket bolt from the cylinder head.
  8.  
  9. Grasp the oil level indicator tube firmly and pull it upward to remove it.
  10.  
  11. Loosen the upper radiator hose clamp sufficiently to remove the upper radiator hose from the coolant pipe.
  12.  
  13. Twist the coolant intake pipe to remove it.
  14.  
  15. The left exhaust manifold can not be completely removed. The manifold must be pulled away to separate it from the cylinder head to allow for cylinder head removal.
  16.  
  17. Detach the ignition coil electrical connection.
  18.  
  19. Loosen the cylinder head bolts in stages using the reverse of the tightening sequence, and remove the bolts. Lift the cylinder head off the block, and remove the head gasket.
  20.  
  21. Remove the ignition coil and bracket from the head, if necessary.
  22.  



Click image to see an enlarged view

Fig. Cylinder head tightening sequence-3.0L Engine



Click image to see an enlarged view

Fig. Driver's side camshaft bearing cap reference marks



Click image to see an enlarged view

Fig. Camshaft bearing cap reference mark location

To install:

  1. Clean the cylinder head sealing surfaces using a suitable cleaner.
  2.  
  3. Attach the ignition coil and bracket to the cylinder head.
  4.  
  5. Place a new cylinder head gasket with the "OBEN/TOP" imprint toward the front of the engine for the left cylinder head.
  6.  
  7. When placing the cylinder head into position onto the cylinder block, ensure adequate clearance from all wires, and components, etc.
  8.  
  9. Install the cylinder head bolts.
  10.  


NOTE
Always use new head bolts. The required tightening method will stretch the bolts, and they are not considered reusable.


NOTE
Position the crankshaft to 60 degrees Before Top Dead Center (BTDC) to ensure there will not be contact between the valves and pistons during reinstallation of the cylinder head

  1. Tighten the cylinder head bolts in stages, using the angle/torque method and this tightening sequence on the first pass to 18 ft. lbs. (25 Nm).
  2.  
  3. Second pass to 90 degrees using a Torque/Angle Meter.
  4.  
  5. Third pass to 90 degrees using a Torque/Angle Meter.
  6.  
  7. Fourth pass to 90 degrees using a Torque/Angle Meter.
  8.  
  9. Final pass to 90 degrees using a Torque/Angle Meter.
  10.  

  1. Reconnect the ignition coil.
  2.  
  3. Install the left exhaust manifold to the cylinder head.
  4.  
  5. Replace the two sealing rings on the coolant pipe and lubricate them with coolant prior to installation.
  6.  
  7. Install the coolant pipe, attach the upper radiator hose to the pipe, and secure it with a clamp.
  8.  
  9. Install the oil level indicator tube.
  10.  
  11. Attach the coolant pipe/engine lift bracket bolt to the cylinder head. Ensure the bolt passes through all the attached components. Tighten the bolt to 15 ft. lbs. (20 Nm).
  12.  
  13. Install the LH exhaust camshaft (#4).
    1. Lubricate the camshaft lobe/lifter contacts with GM P/N 12345501 or equivalent.
    2.  
    3. Lubricate the camshaft bearing surfaces with Assembly Fluid GM P/N 1052367 or equivalent.
    4.  

  14.  


NOTE
Ensure that the camshaft bearing caps are installed with their corresponding numerical codes on the cylinder head. The alphabetical code is reversed. Code "L" is installed on the passenger side of the vehicle, code "R" is installed on the driver's side.

  1. Put a small amount of Loctite® 573 or equivalent on the edge of the most forward bearing cap to ensure an adequate seal of the bearing caps to the cylinder head surface.
  2.  


NOTE
Do not allow the sealer to get into the oil journal of the cap.

  1. Install the camshaft bearing cap bolts. Tighten the camshaft bearing cap bolts sequentially, starting from the center, and moving outwards in a spiral direction. Tighten to 71 inch lbs. (8 Nm).
  2.  
  3. Connect the camshaft sensor.
  4.  
  5. Install the camshaft seal. Coat the lip of the seal with a small amount of chassis grease to aid in installation.
  6.  
  7. Using the special tool J 35268-A, tap the seal into place ensure the seal is fully and evenly seated.
  8.  
  9. Install the camshaft gear. Position the camshaft pins as shown in the accompanying diagrams. The alignment pin on the camshaft must be installed in the correct, numbered, alignment slot on the camshaft gear as shown.
  10.  
  11. Install a new camshaft gear bolt. The required tightening method will stretch the bolt, thereby they are not considered reusable.
    1. Tighten the camshaft gear bolt on the first pass to 37 ft. lbs. (50 Nm).
    2.  
    3. Second pass to 60 degrees using a Torque/Angle Meter
    4.  
    5. Final pass to 15 degrees using a Torque/Angle Meter
    6.  

  12.  


NOTE
Use the relevant tool (J 42069-1 or J42069-2) to hold the camshaft gear and camshaft in place while tightening.

  1. Install the rear timing belt cover.
  2.  
  3. Install the water pump.
  4.  
  5. Replace the camshaft gears for intake and exhaust camshafts 3 and 4. Refer to accompanying diagram.
  6.  
  7. Install the timing belt tensioner bracket.
  8.  
  9. Install the timing belt.
  10.  
  11. Replace the front timing belt cover.
  12.  
  13. Install the LH valve cover and gasket.
  14.  
  15. Install the coolant bridge and secure the attaching parts.
  16.  
  17. Place the intake manifold spacer on the engine and install the intake manifold. Follow the repair procedure and the torque sequence.
  18.  
  19. Install the resonance chamber.
  20.  
  21. Replace the intake plenum.
  22.  
  23. Connect the negative battery cable.
  24.  



Click image to see an enlarged view

Fig. Camshaft pin and camshaft gear slot alignment for camshaft gears 1 and 2



Click image to see an enlarged view

Fig. Camshaft pin and camshaft gear slot alignment for camshaft gears3 and 4

Right cylinder head


Click image to see an enlarged view

Fig. Passenger side camshaft bearing cap reference marks

  1. Disconnect the negative battery cable.
  2.  
  3. Drain and recycle the engine coolant.
  4.  
  5. Remove the intake plenum.
  6.  
  7. Disconnect the resonance chamber and remove it.
  8.  
  9. Remove the intake manifold.
  10.  
  11. Remove the coolant bridge and seals.
  12.  
  13. Take off the RH valve cover.
  14.  
  15. Remove the front timing belt cover.
  16.  
  17. Using the given repair procedure, remove the timing belt.
  18.  


NOTE
Position the crankshaft to 60°BTDC to ensure there will not be contact between the valves and pistons during re-installation of the cylinder head.

  1. Remove the timing belt tensioner bracket.
  2.  
  3. The camshaft gears for the intake and exhaust camshafts must be removed.
  4.  
  5. Remove the water pump.
  6.  
  7. Remove the rear timing belt cover.
  8.  
  9. Remove the exhaust camshaft (camshaft #1).
  10.  
  11. Take the coolant intake pipe out following the procedure given.
  12.  
  13. Pull away the left exhaust manifold from the cylinder head.
  14.  


NOTE
The right exhaust manifold can not be completely removed. The manifold must be separated from the cylinder head to allow for cylinder head removal.

  1. Loosen the cylinder head bolts in stages using the reverse of the tightening sequence; remove the bolts, remove the cylinder head and gasket.
  2.  

To install:

  1. Clean the cylinder head sealing surfaces.
  2.  
  3. Install the new cylinder head gasket with the "OBEN/TOP" imprint toward the rear of the engine for the right cylinder head.
  4.  
  5. Ensure adequate clearance from all the wires, components, etc. when installing the cylinder head onto the engine block.
  6.  
  7. Always use new head bolts. The required tightening method will stretch the bolts, thereby they are not considered reusable.
  8.  
  9. Position the crankshaft to 60°BTDC to ensure there will not be contact between the valves and pistons during re-installation of the cylinder head.
    1. Tighten the cylinder head bolts in stages, using the angle/torque method and this tightening sequence on the first pass to 18 ft. lbs. (25 Nm).
    2.  
    3. Second pass to 90 degrees using a Torque/Angle Meter.
    4.  
    5. Third pass to 90 degrees using a Torque/Angle Meter.
    6.  
    7. Fourth pass to 90 degrees using a Torque/Angle Meter.
    8.  
    9. Final pass to 90 degrees using a Torque/Angle Meter.
    10.  

  10.  
  11. Install the right exhaust manifold to the cylinder head.
  12.  
  13. Replace the two sealing rings on the coolant pipe and lubricate them with coolant prior to installation.
  14.  
  15. Install the coolant pipe, attach the upper radiator hose to the pipe, and secure it with a clamp.
  16.  
  17. Install the RH exhaust camshaft (#1).
    1. Lubricate the camshaft lobe/lifter contacts with GM P/N 12345501 or equivalent.
    2.  
    3. Lubricate the camshaft bearing surfaces with Assembly Fluid GM P/N 1052367 or equivalent.
    4.  

  18.  


NOTE
Ensure that the camshaft bearing caps are installed with their corresponding numerical codes on the cylinder head. The alphabetical code is reversed. Code "L" is installed on the passenger side of the vehicle, code "R" is installed on the driver's side.

  1. Put a small amount of Loctite® 573 or equivalent on the edge of the most forward bearing cap to ensure an adequate seal of the bearing caps to the cylinder head surface.
  2.  


NOTE
Do not allow the sealer to get into the oil journal of the cap.

  1. Install the camshaft bearing cap bolts. Tighten the camshaft bearing cap bolts sequentially, starting from the center, and moving outwards in a spiral direction. Tighten to 71 inch lbs. (8 Nm).
  2.  
  3. Install the camshaft seal. Coat the lip of the seal with a small amount of chassis grease to aid in installation.
  4.  
  5. Using the special tool J 35268-A, tap the seal into place ensure the seal is fully and evenly seated.
  6.  
  7. Install the camshaft gear. Position the camshaft pins as shown in the accompanying diagrams. The alignment pin on the camshaft must be installed in the correct, numbered, alignment slot on the camshaft gear as shown.
  8.  
  9. Install a new camshaft gear bolt. The required tightening method will stretch the bolt, thereby they are not considered reusable.
    1. Tighten the camshaft gear bolt on the first pass to 37 ft. lbs. (50 Nm).
    2.  
    3. Second pass to 60 degrees using a Torque/Angle Meter
    4.  
    5. Final pass to 15 degrees using a Torque/Angle Meter
    6.  

  10.  


NOTE
Use the relevant tool (J 42069-1 or J42069-2) to hold the camshaft gear and camshaft in place while tightening.

  1. Install the rear timing belt cover.
  2.  
  3. Install the water pump.
  4.  
  5. Replace the camshaft gears for intake and exhaust camshafts 3 and 4. Refer to accompanying diagram.
  6.  
  7. Install the timing belt tensioner bracket.
  8.  
  9. Install the timing belt.
  10.  
  11. Replace the front timing belt cover.
  12.  
  13. Install the RH valve cover and gasket.
  14.  
  15. Install the coolant bridge and secure the attaching parts.
  16.  
  17. Place the intake manifold spacer on the engine and install the intake manifold. Follow the torque sequence.
  18.  
  19. Install the resonance chamber.
  20.  
  21. Replace the intake plenum.
  22.  
  23. Connect the negative battery cable.
  24.  

4.5L and 4.9L Engines
RIGHT SIDE
  1. Disconnect the negative battery cable. Drain the engine coolant.
  2.  
  3. Remove rocker arm covers.
  4.  
  5. Remove the lower intake and right side exhaust manifolds.
  6.  
  7. Remove engine lift bracket and oil dipstick tube.
  8.  
  9. Reposition AIR bracket.
  10.  
  11. Remove 10 cylinder head bolts.
  12.  
  13. Remove cylinder head.
  14.  

To install:


NOTE
Clean sealing surfaces of cylinder head, block and liners. Clean cylinder head bolt holes with an appropriate tap. Ensure that bolt holes are free of shavings, oil and coolant.

  1. Install new head gasket over dowels on cylinder block with either side facing up.
  2.  
  3. Install cylinder head.
  4.  
  5. Apply an appropriate lubricant to the threads of the head bolts. Install cylinder head bolts finger-tight.
  6.  
  7. Tighten cylinder head bolts, in sequence, to 38 ft. lbs. (50 Nm).
  8.  
  9. Tighten cylinder head bolts, in sequence, to 68 ft. lbs. (90 Nm).
  10.  
  11. Tighten No. 1, 3 and 4 cylinder head bolts to 90 ft. lbs. (120 Nm).
  12.  
  13. Install engine lift bracket and AIR bracket.
  14.  
  15. Install lower intake and right side exhaust manifolds.
  16.  
  17. Install rocker arm covers.
  18.  
  19. Fill cooling system.
  20.  
  21. Connect negative battery cable.
  22.  
  23. Start engine and check for coolant, oil and fuel leaks. Allow engine to come to normal operating temperature and recheck for leaks.
  24.  

LEFT SIDE
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove the rocker arm covers.
  6.  
  7. Remove the intake manifold-to-engine bolts and intake manifold.
  8.  



Click image to see an enlarged view

Fig. Cylinder head torque sequence-4.5L and 4.9L engines

  1. Disconnect the exhaust manifold crossover pipe, the exhaust pipe-to-exhaust manifold bolts, the exhaust manifold-to-cylinder head bolts and the exhaust manifold.
  2.  
  3. Remove the engine lifting bracket and the dipstick tube.
  4.  
  5. Remove the AIR bracket-to-engine bolts and move the bracket aside.
  6.  
  7. Remove the cylinder head-to-engine bolts and the cylinder head.
  8.  

To install:

  1. Clean the gasket mounting surfaces.
  2.  
  3. Install new head gasket over dowels on cylinder block with either side facing up.
  4.  
  5. Install cylinder head.
  6.  
  7. Apply a suitable lubricant to the cylinder head bolt threads.
  8.  
  9. Install cylinder head bolts finger-tight.
  10.  
  11. Tighten bolts, in sequence, to 38 ft. lbs. (50 Nm).
  12.  
  13. Tighten cylinder head bolts, in sequence, to 68 ft. lbs. (90 Nm).
  14.  
  15. Tighten No. 1, 3 and 4 cylinder head bolts to 90 ft. lbs. (120 Nm).
  16.  
  17. Install AIR bracket. Install dipstick tube and engine lift bracket.
  18.  
  19. Install exhaust manifold. Install lower intake manifold.
  20.  
  21. Install rocker arm covers.
  22.  
  23. Fill cooling system.
  24.  
  25. Connect negative battery cable.
  26.  
  27. Start engine and check for coolant, oil and fuel leaks. Allow engine to come to normal operating temperature and recheck for leaks.
  28.  

4.6L Engine

NOTE
Because of the bulk and complexity of the 4.6L engine, cylinder head removal may best be accomplished with the engine out of the vehicle. For this procedure it may be most economical to remove the entire powertrain and cradle out the bottom of the body and to utilize the cradle as an engine stand.

  1. Remove the powertrain assembly.
  2.  
  3. Remove the intake manifold, camshaft covers, harmonic balancer, front cover and oil pump.
  4.  
  5. Remove the chain tensioner from the timing chain for the cylinder head being removed.
  6.  
  7. Remove the cam sprockets from the head being removed. The timing chain remains in the chain case.
  8.  
  9. Removing the timing chain guides. Access to the retaining screws is through the plugs at the front of the cylinder head.
  10.  
  11. Remove the water crossover.
  12.  
  13. Remove the exhaust manifold.
  14.  
  15. Remove the cylinder head bolts.
  16.  
  17. Remove the cylinder head and gasket.
  18.  


WARNING
With the camshafts remaining in the cylinder head some valves will be open at all times. Do not rest the cylinder head on a flat service with the cylinder face down, or valve damage will result.

To install:

  1. Clean the gasket services and combustion chamber.
  2.  


WARNING
When cleaning aluminum gasket services, use only plastic or wood scrapers and/or an appropriate chemical dissolving agent to avoid damaging the sealing surfaces.

  1. Using a new cylinder head gasket, install the cylinder head and the 10 M11 and 3 M6 head bolts. Lube the washer and the underside of the bolt head with engine oil prior to installation. Tighten the 10 M11 bolts in sequence to 22 ft. lbs. (30 Nm) plus 90°, plus an additional 90°for a total of 180°. Tighten the 3 M6 bolts to 10 ft. lbs. (12 Nm).
  2.  
  3. Install the camshafts.
  4.  
  5. Set the camshaft timing.
  6.  
  7. Install the camshaft guide bolt access hole plugs in the cylinder heads. The plugs should be seated and snug.
  8.  
  9. Install the intake manifold, camshaft covers, harmonic balancer, front cover and oil pump.
  10.  
  11. Install the water crossover.
  12.  
  13. Install the exhaust manifold.
  14.  
  15. Install the powertrain assembly.
  16.  



Click image to see an enlarged view

Fig. Cylinder head torque sequence-4.6L Northstar engine

 
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