Chevrolet Full-size Cars 1968-1978 Repair Guide

Engine

Print

REMOVAL & INSTALLATION





Click image to see an enlarged view

Fig. Fig. 1 Exploded views of a typical engine mounting-all models are similar



Click image to see an enlarged view

Fig. Fig. 2 When removing nuts, bolts and other parts, place them in a tray or other container


CAUTION
Please refer to before discharging the compressor or disconnecting air conditioning lines. Damage to the air conditioning system or personal injury could result.

Inline 6-Cylinder Engine
  1. Scribe alignment marks around the hood hinges and remove the hood.
  2.  
  3. Disconnect the negative battery cable. Remove the air cleaner.
  4.  
  5. Drain the cooling system.
  6.  


CAUTION
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 quantity. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

  1. Disconnect the radiator and the heater hoses, then remove the radiator and the fan shroud.
  2.  

If equipped with an automatic transmission, disconnect and plug the oil cooler lines at the radiator.

  1. Disconnect and label the wires at the ignition coil, the starter, the alternator, the temperature switch and the oil pressure switch.
  2.  
  3. Disconnect accelerator control cable at the inlet manifold, the fuel inlet line from the fuel pump, the hoses from the vapor canister and (if equipped) the power brake vacuum line from the intake manifold.
  4.  
  5. If equipped with power steering, remove the power steering pump and move it aside.
  6.  
  7. Raise and support the vehicle safely. Drain the engine oil.
  8.  


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

an environmental tip. Used oil contains heavy metals, and has been determined to be hazardous to the environment. Recycling oil is the best way for disposal. Check local laws and recycle whenever possible.

  1. Disconnect the exhaust pipe from the exhaust manifold and (if equipped) the converter bracket from the rear transmission mount.
  2.  
  3. Remove the starter and the flywheel splash shield or the converter housing cover.
  4.  
  5. If equipped with an automatic transmission, remove the converter-to-flexplate bolts.
  6.  
  7. Attach a vertical hoist to the engine and support the transmission with a floor jack, then raise the engine slightly.
  8.  
  9. Remove the engine mount through bolts and the bell housing-to-engine bolts.
  10.  
  11. Carefully remove the engine from the vehicle.
  12.  

To install:

  1. Attach the engine hoist and lower the engine into position.
  2.  

Make sure the torque converter bolts are aligned with the mounting holes on the flexplate, before attaching bell housing to engine.

  1. Support the transmission with a floor jack and install the bell housing-to-engine bolts and the engine mount through bolts.
  2.  

Make sure the torque converter bolts are aligned with the mounting holes on the flexplate, before attaching bell housing to engine.

  1. If equipped with an automatic transmission, install the converter-to-flexplate bolts.
  2.  
  3. Install the starter and the flywheel splash shield or the converter housing cover.
  4.  
  5. Connect the exhaust pipe to the exhaust manifold and (if equipped) the converter bracket to the rear transmission.
  6.  
  7. Lower the vehicle.
  8.  
  9. If equipped with power steering, install the power steering pump.
  10.  
  11. Connect accelerator control cable at the inlet manifold, the fuel inlet line to the fuel pump, the hoses to the vapor canister and (if equipped) the power brake vacuum line to the intake manifold.
  12.  
  13. Connect and labeled wires at the ignition coil, the starter, the alternator, the temperature switch and the oil pressure switch.
  14.  

If equipped with an automatic transmission, connect the oil cooler lines at the radiator.

  1. Install the radiator and fan shroud, then connect the heater and radiator hoses.
  2.  
  3. Fill the cooling system and the crankcase.
  4.  
  5. Connect the negative battery cable and remove the air cleaner.
  6.  
  7. Install the hood.
  8.  

V8 Engine
  1. Scribe alignment marks on hood and remove hood from hinges.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Drain cooling system, then remove the heater hoses and the radiator hoses from the engine.
  6.  


CAUTION
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 quantity. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

  1. Remove the upper fan shroud and the fan assembly.
  2.  
  3. If equipped with air conditioning and power steering, remove the compressor and the power steering pump, then move them aside.
  4.  
  5. Disconnect the accelerator and the T.V. cables.
  6.  
  7. Remove the transmission oil cooler lines, if equipped from the radiator and remove the radiator.
  8.  
  9. Disconnect and label the vacuum hoses from the engine, as required.
  10.  
  11. Remove the AIR pipe from the converter, as required.
  12.  
  13. Remove the windshield washer bottle, if necessary.
  14.  
  15. Disconnect and mark the wiring harness at the bulkhead and related engine wiring.
  16.  
  17. Remove the distributor cap and the cruise control cable, if equipped.
  18.  
  19. Disconnect the positive battery cable from the battery and the frame. Disconnect the negative battery cable from the air conditioning hose/alternator bracket.
  20.  
  21. Raise and support the vehicle safely.
  22.  
  23. Remove the crossover pipe and the catalytic converter as an assembly, if equipped.
  24.  
  25. If equipped with an automatic transmission, remove the torque converter cover and the torque converter bolts.
  26.  

Before removing the torque converter bolts, scribe a mark to ensure the relationship between the torque converter and the flex plate.

  1. Remove the engine-to-mount bolts.
  2.  
  3. Disconnect and plug the fuel line at the fuel pump.
  4.  
  5. If equipped with an automatic transmission, disconnect the torque converter clutch wiring from the transmission. Disconnect the transmission oil cooler lines from the clip at the engine oil pan.
  6.  
  7. Remove engine-to-transmission bolts.
  8.  
  9. Lower the vehicle. Properly support the transmission.
  10.  
  11. Secure a vertical lifting device to the engine and remove the engine from the vehicle.
  12.  


CAUTION
When removing the engine from the transmission, be careful that the torque converter does not pull out of the transmission.

To install:

  1. Secure a vertical lifting device to the engine and install the engine to the vehicle.
  2.  
  3. Support the transmission.
  4.  
  5. Install the engine-to-transmission bolts.
  6.  

Make sure the torque converter bolts are aligned with the mounting holes on the flexplate, before attaching bell housing to engine.

  1. If equipped with an automatic transmission, connect the torque converter clutch wiring to the transmission. Connect the transmission oil cooler lines to the clip at the engine oil pan.
  2.  
  3. Connect the fuel line to the fuel pump.
  4.  
  5. Install the engine-to-mount bolts.
  6.  
  7. If equipped with an automatic transmission, install the torque converter cover and the torque converter bolts.
  8.  
  9. As required, install the crossover pipe and the catalytic converter as an assembly.
  10.  
  11. Lower the vehicle.
  12.  
  13. Connect the positive battery cable to the battery and the frame. Connect the negative battery cable to the air conditioning hose/alternator bracket.
  14.  
  15. Install the distributor cap and the cruise control cable (if equipped).
  16.  
  17. Connect the wiring harness at the bulkhead and related engine wiring.
  18.  
  19. As required, install the windshield washer bottle.
  20.  
  21. As required, install the AIR pipe to the converter.
  22.  
  23. Connect the vacuum hoses to the engine.
  24.  
  25. Install the transmission oil cooler lines, if equipped to the radiator and install the radiator.
  26.  
  27. Connect the accelerator and the T.V. cables.
  28.  
  29. If equipped with air conditioning and power steering, install the compressor and the power steering pump.
  30.  
  31. Install the upper fan shroud and the fan assembly.
  32.  
  33. Install the heater hoses and the radiator hoses to the engine.
  34.  
  35. Fill the cooling system.
  36.  
  37. Connect the negative battery cable.
  38.  
  39. Install the hood.
  40.  

 
label.common.footer.alt.autozoneLogo