Toyota Celica/Supra 1971-1985 Repair Guide

Engine

Print

REMOVAL & INSTALLATION



See Figures 1 and 2

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 additions to any repair procedure. Be absolutely sure to tag any wire or hose before it is disconnected, so that you can be assured of proper reconnection during installation.



Click image to see an enlarged view

Fig. Fig. 1: When removing nuts, bolts and other parts, place them in a tray or other container



Click image to see an enlarged view

Fig. Fig. 2: Engine component locations-20R and 22R engine family shown

8R-C, 18R-C, 20R and 22R Engines
  1. Drain the radiator, cooling system, transmission, and engine oil.
  2.  
  3. Disconnect the battery-to-starter cable at the positive battery terminal, after first disconnecting the negative cable.
  4.  
  5. Scribe marks on the hood and its hinges to aid in alignment during installation.
  6.  
  7. Remove the hood supports from the body. Remove the hood.
  8.  

Do not remove the supports from the hood.

  1. Remove the headlight bezel and the radiator grille.
  2.  
  3. Remove the radiator shroud, the hood lock base and the base support.
  4.  
  5. Detach both the upper and lower hoses from the radiator. On cars with automatic transmissions, disconnect and plug the lines from the oil cooler. Remove the radiator.
  6.  
  7. Unfasten the clamps and remove the heater bypass hoses from the engine. Remove the heater control cable from the water valve. If the car has power steering, remove the pump with bracket.
  8.  
  9. Remove the wiring from the coolant temperature and oil pressure sending units.
  10.  
  11. Remove the air cleaner from its bracket, complete with its attendant hoses.
  12.  
  13. Unfasten the accelerator torque rod from the carburetor. On models equipped with automatic transmissions, remove the transmission linkage as well.
  14.  
  15. Remove the emission control system hoses and wiring including the oxygen sensor wire (if equipped), as necessary. (Mark them to aid in installation).
  16.  
  17. Remove the clutch hydraulic line support bracket.
  18.  
  19. Unfasten the high tension and primary wires from the coil.
  20.  
  21. Mark the spark plug cables and remove them from the distributor.
  22.  
  23. Detach the right-hand front engine mount. Disconnect the engine shock absorber at its upper mounting.
  24.  
  25. Remove the fuel line at the pump (filter on 1975-76 models with electric pumps).
  26.  
  27. Detach the downpipe from the exhaust manifold.
  28.  
  29. Detach the left-hand front engine mount. Disconnect the engine shock absorber from its lower mounting.
  30.  
  31. Separate all of the wiring harness multi-connectors.
  32.  
  33. Perform the following 3 steps on 1971-72 models with manual transmissions:
    1. Remove the center console if so equipped.
    2.  
    3. Remove the shift lever boot(s).
    4.  
    5. Unfasten the four shift lever cap retaining screws. Remove the cap and withdraw the shift lever assembly.
    6.  

  34.  
  35. Perform the following 2 steps on models equipped with automatic transmissions:
    1. Remove the transmission selector linkage; disconnect the control rod from the transmission.
    2.  
    3. Disconnect the neutral safety switch wiring.
    4.  

  36.  
  37. Raise the rear of the vehicle with jacks and support it with jackstands.
  38.  


CAUTION
Be sure that the vehicle is securely supported.

  1. Remove the retaining screws and remove the parking brake equalizer support bracket. Disconnect the cable which runs between the lever and the equalizer.
  2.  
  3. Remove the speedometer cable from the transmission. Disconnect the back-up light wiring.
  4.  
  5. Detach the driveshaft from the rear of the transmission.
  6.  

If oil runs out of the transmission, an old U-joint yoke sleeve makes an excellent plug. If a sleeve is not available, plug with a rag.

  1. Detach the clutch release cylinder assembly, complete with hydraulic lines. Do not disconnect the lines.
  2.  
  3. Unbolt the rear support member mounting insulators.
  4.  
  5. Support the transmission and detach the rear support member retaining bolts. Withdraw the support member from under the car.
  6.  
  7. Install lifting hooks on the engine lifting brackets. Attach a suitable hoist to the engine.
  8.  
  9. Remove the jack from under the transmission.
  10.  
  11. Raise the engine and move it toward the front of the car. Use care to avoid damaging the components which remain in the car.
  12.  
  13. Support the engine on a workstand.
  14.  

Installation of the engine is the reverse order of removal.

Replenish the engine oil, coolant, and transmission oil to the proper levels.

22R-EC Engine

See Figures 3, 4, 5, 6 and 7



Click image to see an enlarged view

Fig. Fig. 3: Disconnecting the accelerator linkage on fuel injected engines



Click image to see an enlarged view

Fig. Fig. 4: If the car has power steering, remove the pump with bracket



Click image to see an enlarged view

Fig. Fig. 5: Remove the engine's shock absorber mounting bolts (lower bolts shown)



Click image to see an enlarged view

Fig. Fig. 6: Unbolt the EGR vacuum module bracket



Click image to see an enlarged view

Fig. Fig. 7: Unfasten the air flow meter from the engine

  1. Drain the radiator, cooling system, transmission, and engine oil.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Disconnect the battery-to-starter cable at the positive battery terminal.
  6.  
  7. Scribe marks on the hood and its hinges to aid in alignment during installation.
  8.  
  9. Remove the hood supports from the body. Remove the hood.
  10.  

Do not remove the supports from the hood.

  1. Remove the headlight bezel and the radiator grille.
  2.  
  3. Remove the radiator shroud, the hood lock base and the base support.
  4.  
  5. Detach both the upper and lower hoses from the radiator. On cars with automatic transmissions, disconnect and plug the lines from the oil cooler. Remove the radiator.
  6.  
  7. Unfasten the clamps and remove the heater bypass hoses from the engine. Remove the heater control cable from the water valve. If the car has power steering, remove the pump with bracket.
  8.  
  9. Remove the wiring from the coolant temperature and oil pressure sending units.
  10.  
  11. Remove the air cleaner from its bracket, complete with its attendant hoses.
  12.  
  13. Disconnect the automatic transmission actuator cable, accelerator cable and throttle cable from the bracket on the side of the EFI intake chamber.
  14.  
  15. Tag and disconnect the PCV hoses, the brake booster hose, the actuator hose (if equipped with cruise control), the air control valve hose and the air control valve.
  16.  
  17. Remove the EGR vacuum modulator and bracket after tagging and disconnecting the EGR modulator hoses.
  18.  
  19. Tag and disconnect the remaining emission control hoses as necessary, including the air valve hoses from the intake chamber and throttle body; the water bypass hoses from the throttle body, the air control valve hose to the actuator and the pressure regulator hose from the intake chamber.
  20.  
  21. Tag and disconnect the cold start injector pipe and cold start injector.
  22.  
  23. Tag and disconnect the throttle position sensor wire and the air valve wire.
  24.  
  25. Remove the bolt holding the EGR valve to the intake chamber. Disconnect the chamber from the stay, then remove the chamber from the intake manifold with the throttle body attached.
  26.  
  27. Tag and disconnect the water temperature sender, overdrive (with AT) thermo-switch, start injection time, temperature sensor and injection wires.
  28.  
  29. Remove the two set bolts from the top and bottom of the steering universal, and remove the sliding yoke.
  30.  
  31. Disconnect the tie rod ends. Disconnect the pressure line mounting bolts from the front crossmember.
  32.  
  33. Without disconnecting the oil pipe, remove the mounting bolts to the rack-and-pinion assembly and carefully suspend it from the front crossmember without stretching the fluid hoses.
  34.  
  35. Remove the clutch hydraulic line support bracket.
  36.  
  37. Unfasten the high tension and primary wires from the coil.
  38.  
  39. Mark the spark plug cables and remove them from the distributor.
  40.  
  41. Detach the right-hand front engine mount. Disconnect the engine shock absorber at its upper mounting.
  42.  
  43. Remove the fuel line at the pump.
  44.  
  45. Detach the downpipe from the exhaust manifold.
  46.  
  47. Detach the left-hand front engine mount. Disconnect the engine shock absorber from its lower mounting.
  48.  
  49. Disconnect all of the wiring harness multi-connectors.
  50.  
  51. Perform the following steps on models with manual transmissions:
    1. Remove the center console if so equipped.
    2.  
    3. Remove the shift lever boot(s).
    4.  
    5. Unfasten the four shift lever cap retaining screws. Remove the cap and withdraw the shift lever assembly.
    6.  

  52.  
  53. Perform the following steps on models equipped with automatic transmissions:
    1. Remove the transmission selector linkage; disconnect the control rod from the transmission.
    2.  
    3. Disconnect the neutral safety switch wiring.
    4.  

  54.  
  55. Raise the rear of the vehicle with jacks and support it with jackstands.
  56.  


CAUTION
Be sure that the vehicle is securely supported.

  1. Remove the retaining screws and remove the parking brake equalizer support bracket. Disconnect the cable which runs between the lever and the equalizer.
  2.  
  3. Remove the speedometer cable from the transmission. Disconnect the back-up light wiring.
  4.  
  5. Detach the driveshaft from the rear of the transmission.
  6.  

If oil runs out of the transmission, an old U-joint yoke sleeve makes an excellent plug. If a sleeve is not available, plug with a rag.

  1. Detach the clutch release cylinder assembly, complete with hydraulic lines. Do not disconnect the lines.
  2.  
  3. Unbolt the rear support member mounting insulators.
  4.  
  5. Support the transmission and detach the rear support member retaining bolts. Withdraw the support member from under the car.
  6.  
  7. Install lifting hooks on the engine lifting brackets. Attach a suitable hoist to the engine.
  8.  
  9. Remove the jack from under the transmission.
  10.  
  11. Raise the engine and move it toward the front of the car. Use care to avoid damaging the components which remain in the car.
  12.  
  13. Support the engine on a workstand.
  14.  

Installation of the engine is the reverse order of removal. Refer to the appropriate sections for transmission adjustments. Install the hood and adjust it as outlined in General Information & Maintenance . Replenish the engine oil, coolant, and transmission oil to the proper levels, as outlined in General Information & Maintenance .

4M-E and 5M-E Engines
  1. Disconnect the battery cables and remove the battery.
  2.  
  3. Scribe aligning marks on the hood and hinges to aid in their assembly. Remove the hood.
  4.  
  5. Remove the fan shroud and drain the cooling system.
  6.  
  7. Disconnect both the upper and lower radiator hoses. Unfasten the oil lines from the oil cooler on cars with automatic transmissions.
  8.  
  9. Detach the hose which runs to the thermal expansion tank, at the tank. Remove the expansion tank from its mounting bracket.
  10.  
  11. Remove the radiator.
  12.  
  13. Disconnect the heater and bypass hoses from the engine.
  14.  
  15. Disconnect the oil pressure light sender wiring, the alternator multi-connector, and the back-up light switch wiring.
  16.  
  17. Unfasten the power brake unit vacuum lines.
  18.  
  19. Disconnect the engine oil cooler hoses at the oil filter, if so equipped.
  20.  
  21. Disconnect the power steering fluid cooler hose, if so equipped.
  22.  
  23. Remove the air cleaner assembly from its bracket, complete with hoses.
  24.  
  25. Detach the emission control system wires and hoses, as required. Mark them first.
  26.  
  27. Unfasten the distributor primary wire and the high tension wire from the coil.
  28.  
  29. Disconnect the wiring from the starter and temperature gauge sender.
  30.  
  31. Remove the fuel line from the fuel filter.
  32.  
  33. Disconnect the heater control cable from the water valve. Unfasten the heater control vacuum hose.
  34.  
  35. Tag and disconnect any remaining hoses, lines or wires which may still be attached to the engine.
  36.  
  37. Detach the hydraulic line from its master cylinder connections (manual transmission only). Install a cap on the master cylinder fitting to keep the hydraulic fluid from running out.
  38.  
  39. Detach the pressure-feed lines from the steering gear housing on models equipped with power steering.
  40.  
  41. Raise both the front and the rear of the car with jacks. Support the car with jackstands.
  42.  


CAUTION
Be sure that the car is securely supported.

  1. Detach the exhaust pipe from the downpipe and remove the exhaust pipe hangers.
  2.  
  3. Disconnect the speedometer cable from the right side of the transmission.
  4.  
  5. On models with a manual transmission:
    1. Remove the center console securing screws, the gearshift knob, the gearshift boot, and then unfasten the console wiring multi-connector. Lift the console over the gearshift lever.
    2.  
    3. Remove the four screws which attach the shift lever retainer to the shift tower and withdraw the shift lever assembly.
    4.  

  6.  
  7. On models equipped with an automatic transmission, unfasten the connecting rod swivel nut and detach the control rod from the gear selector lever.
  8.  
  9. Disconnect the parking brake lever rod, return spring, intermediate rod, and the cable from the equalizer.
  10.  
  11. Disconnect the driveshaft from the end of the transmission.
  12.  

If oil runs out of the transmission, an old U-joint yoke makes a good plug, or secure a plastic bag over the opening with rubber bands.

  1. Remove the left-hand gravel shield and then the front engine mounts.
  2.  
  3. Support the transmission with a jack.
  4.  
  5. Remove the rear engine mounts and the rear crossmember.
  6.  
  7. Attach a hoist to the engine and lift it up and forward, so that it clears the car.
  8.  

Installation is in the reverse order of removal. Adjust the transmission and carburetor linkages, as detailed in the appropriate sections. Bleed the clutch as outlined in Drive Train . Install the hood and adjust it ( Interior ). Replenish the fluid levels as outlined in General Information & Maintenance .

5M-GE Engine
  1. Disconnect the battery cables and remove the battery.
  2.  
  3. Scribe aligning marks on the hood and hinges to aid in their assembly. Remove the hood.
  4.  
  5. Remove the fan shroud and drain the cooling system.
  6.  
  7. Disconnect both the upper and lower radiator hoses. Unfasten the oil lines from the oil cooler on cars with automatic transmissions.
  8.  
  9. Detach the hose which runs to the thermal expansion tank, at the tank. Remove the expansion tank from its mounting bracket.
  10.  
  11. Remove the radiator.
  12.  
  13. Remove the air cleaner assembly, including the air flow meter and air intake connector pipe.
  14.  
  15. On cars equipped with automatic transmissions, remove the throttle cable bracket from the cylinder head. On all models, remove the accelerator and actuator cable bracket from the cylinder head.
  16.  
  17. Tag and disconnect the cylinder head ground cable, the oxygen sensor wire, oil pressure sending unit and alternator wires, the high tension coil wire, the water temperature sending unit and thermo-switch (AT) wires, and the starter wires.
  18.  
  19. Tag and detach the ECT connectors and the solenoid resistor wire connector.
  20.  
  21. Tag and disconnect the brake booster vacuum hose from the air intake chamber, along with the EGR valve vacuum hose and the actuator vacuum hose from the air intake chamber (if equipped with cruise control).
  22.  
  23. Disconnect the heater and bypass hoses from the engine.
  24.  
  25. Remove the glove box, and remove the ECU computer module. Separate the three connectors, and pull out the EFI (fuel injection) wiring harness from the engine compartment side of the firewall.
  26.  
  27. Remove the four shroud and four fluid coupling screws, and the shroud and coupling as a unit.
  28.  
  29. Remove the engine undercover protector.
  30.  
  31. Disconnect the coolant reservoir hose and remove the radiator. Remove the coolant expansion tank.
  32.  
  33. Remove the A/C compressor drive belt, and remove the compressor mounting bolts. Without disconnecting the refrigerant hoses, lay the compressor to one side and secure it.
  34.  


CAUTION
The A/C system is charged with the refrigerant R-12, which is dangerous when released. DO NOT disconnect the A/C hoses when removing the engine; if the hoses have to be disconnected at any time, the work should be done by a trained air conditioning mechanic.

  1. Disconnect the power steering pump drive belt and remove the pump stay. Unbolt the pump and lay it aside without disconnecting the fluid hoses.
  2.  
  3. Remove the engine mounting bolts from each side of the engine. Remove the engine ground cable.
  4.  
  5. On manual transmission cars, remove the shift lever from inside the car.
  6.  
  7. Jack up the car and safely support it with jackstands. Drain the engine oil.
  8.  
  9. Disconnect the exhaust pipe from the exhaust manifold. Remove the exhaust pipe clamp from the transmission housing.
  10.  
  11. On manual transmission cars, remove the clutch slave cylinder.
  12.  
  13. Disconnect the speedometer cable at the transmission.
  14.  
  15. On automatic transmission cars, disconnect the shift linkage from the shift lever. On manual transmission cars, disconnect the wire from the back-up light switch.
  16.  
  17. Remove the stiffener plate from the ground cable.
  18.  
  19. Disconnect the fuel line from the fuel filter and the return hose from the fuel hose support. Be sure to catch any leaking fuel. Plug the fuel line.
  20.  
  21. Remove the air cleaner from its bracket, complete with its attendant hoses.
  22.  
  23. Disconnect the automatic transmission actuator cable, accelerator cable and throttle cable from the bracket on the side of the EFI intake chamber.
  24.  
  25. Tag and disconnect the PCV hoses, the brake booster hose, the actuator hose (if equipped with cruise control), the air control valve hose and the air control valve.
  26.  
  27. Remove the intermediate shaft from the drive shaft.
  28.  
  29. Position a hydraulic jack under the transmission, with a wooden block between the two to prevent damage to the transmission case. Place a wooden block between the cowl panel and cylinder head rear end to prevent damage to the heater hoses.
  30.  
  31. Unbolt the engine rear support member from the frame, along with the ground cable.
  32.  
  33. Make sure all wiring is disconnected (and tagged for later assembly), all hoses disconnected, and everything clear of the engine and transmission. Attach an engine lift hoist chain to the lift brackets on the engine, and carefully lift the engine and transmission up and out of the car. It is very helpful to have two or three helpers on this job. Place the engine on a work stand, and remove the transmission at this time.
  34.  
  35. Installation is the reverse of removal.
  36.  

 
label.common.footer.alt.autozoneLogo