Toyota Corolla 1970-1987 Repair Guide

Engine

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See Figures 1 and 2


CAUTION
Please refer to General Information & Maintenance before discharging the compressor or disconnecting air conditioning lines. Damage to the air conditioning system or personal injury could result. Consult your local laws concerning refrigerant discharge and recycling. In many areas it may be illegal for anyone but a certified technician to service the A/C system. Always use an approved recovery station when discharging the air conditioning

Removal & Installation

3K-C
  1. Drain the entire cooling system. Remove any emissions systems hoses which are in the way, but mark them beforehand so that you'll know where to put them back.
  2.  
  3. Disconnect the negative battery cable, then unfasten the cable which runs from the battery to the starter at the battery terminal.
  4.  
  5. Scribe marks on the hood and hinges to aid in hood alignment during assembly. Remove the hood.
  6.  
  7. Unfasten the headlight bezel retaining screws and remove the bezels. Remove the radiator grille attachment screws and remove the grille.
  8.  
  9. Remove the hood lock assembly after detaching the release cable.
  10.  
  11. Unfasten the nuts from the horn retainers and disconnect the wiring. Withdraw the horn assembly.
  12.  
  13. Remove the air cleaner from its bracket after unfastening the hoses from it.
  14.  
  15. Remove the windshield washer tank from its bracket but first drain its contents into a clean container.
  16.  
  17. Remove both the upper and lower radiator hoses from the engine after loosening the hose clamps.
  18.  

On models with automatic transmissions, disconnect and plug the oil line from the oil cooler

  1. Detach the radiator mounting bolts and remove the radiator.
  2.  
  3. Remove the accelerator cable from its support on the cylinder head cover. Unfasten the cable at the carburetor throttle arm. Unfasten the choke cable from the carburetor.
  4.  
  5. Detach the water hose retainer from the cylinder head.
  6.  
  7. Disconnect the by-pass and heater hoses at the water pump. Disconnect the other end of the heater hose from the water valve. Remove the heater control cable from the wiring harness multi-connectors.
  8.  
  9. Detach the exhaust pipe from the exhaust manifold.
  10.  
  11. Detach the wires from the water temperature and oil pressure sending units.
  12.  
  13. Remove the nut from the front left hand engine mount.
  14.  
  15. Remove the fuel line from the fuel pump.
  16.  
  17. Detach the battery ground cable from the cylinder block.
  18.  
  19. Remove the nut from the front right hand engine mount.
  20.  
  21. Remove the clip and detach the cable from the clutch release lever.
  22.  
  23. Remove the primary and high tension wires from the coil.
  24.  
  25. Detach the back-up light switch wire at its connector on the right side of the extension housing.
  26.  
  27. If equipped with a manual transmission, remove the carpet from the transmission tunnel, then remove the boots from the shift lever. Remove the snapring from the gearshift selector lever base and withdraw the selector lever assembly.
  28.  
  29. If equipped with an automatic transmission:
    1. Disconnect the accelerator linkage torque rod at the carburetor.
    2.  
    3. Disconnect the throttle linkage connecting rod from the bellcrank lever.
    4.  
    5. Drain the oil from the transmission oil pan.
    6.  
    7. Detach the transmission gear selector shift rod from the control shaft.
    8.  

  30.  
  31. Raise the rear wheels of the car and support safely using jackstands.
  32.  


CAUTION
Be sure that the car is supported securely; remember, you will be working underneath it!

  1. Disconnect the driveshaft from the transmission.
  2.  

Drain the oil from the manual transmission before removing the driveshaft, this will help prevent it from leaking out

  1. Detach the exhaust pipe support bracket from the extension housing.
  2.  
  3. Remove the insulator bolt from the rear engine mount.
  4.  
  5. Place a jack under the transmission and remove the four bolts from the rear (engine support) crossmember.
  6.  
  7. Install lifting hooks on the engine lifting brackets. Attach a suitable hoist.
  8.  
  9. Lift the engine slightly; then move it toward the front of the car. Bring the engine the rest of the way out at an angle.
  10.  


CAUTION
Use care not to damage other parts of the automobile

  1. Engine installation is the reverse order of removal. Adjust all transmission and carburetor linkages, as detailed in the appropriate section of this repair guide.
  2.  
  3. Install and adjust the hood.
  4.  
  5. Refill the engine, radiator, and transmission fluids to capacity, as detailed in General Information & Maintenance in this repair guide.
  6.  

2T-C, 3T-C and 4A-C (RWD)
  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. Disconnect the hood supports from the body. Remove the hood.
  8.  

Do not remove the supports from the hood

  1. Unfasten the headlight bezel retaining screws and remove the bezels. Remove the radiator grille attachment screws and remove the grille.
  2.  
  3. Remove the hood lock assembly after detaching the release cable.
  4.  
  5. Unfasten the nuts from the horn retainers and disconnect the wiring. Withdraw the horn assembly.
  6.  
  7. 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.
  8.  
  9. Unfasten the clamps and remove the heater and by-pass hoses from the engine. Remove the heater control cable from the water valve.
  10.  
  11. Remove the wiring from the coolant temperature and oil pressure sending units.
  12.  
  13. Remove the air cleaner from its bracket, complete with its hoses.
  14.  
  15. Unfasten the accelerator torque rod from the carburetor. On models equipped with automatic transmissions, remove the transmission linkage as well.
  16.  
  17. Remove the emission control system hoses and wiring, as necessary (mark them to aid in installation).
  18.  
  19. Remove the clutch hydraulic line support bracket.
  20.  
  21. Unfasten the high tension and primary wires from the coil.
  22.  
  23. Mark the spark plug cables and remove them from the distributor.
  24.  
  25. Detach the right hand front engine mount.
  26.  
  27. Remove the fuel line at the pump (or at the filter on 1975-76 models with electric pumps).
  28.  
  29. Detach the downpipe from the exhaust manifold.
  30.  
  31. Detach the left hand front engine mount.
  32.  
  33. Disconnect all of the wiring harness multi-connectors.
  34.  
  35. On cars equipped with manual transmissions, remove the shift lever boot and the shift lever cap boot.
  36.  
  37. Unfasten the four gear selector lever cap retaining screws, remove the gasket and withdraw the gear selector lever assembly from the top of the transmission.
  38.  

On all Corolla 5-speed models, the floor console must be removed in order to access the gear selector lever

  1. Lift the rear wheels of the car off the ground and support the car with jackstands.
  2.  


CAUTION
Be sure that the car is securely supported!

  1. On cars equipped with automatic transmissions, disconnect the gear selector control rod.
  2.  
  3. Detach the exhaust pipe support bracket.
  4.  
  5. Disconnect the driveshaft from the rear of the transmission.
  6.  
  7. Unfasten the speedometer cable from the transmission. Disconnect the wiring from the back-up light switch and the neutral safety switch (automatic only).
  8.  
  9. Detach the clutch release cylinder assembly, complete with hydraulic lines. Do not disconnect the lines.
  10.  
  11. Unbolt the rear support member mounting insulators.
  12.  
  13. Support the transmission and detach the rear support member retaining bolts. Withdraw the support member from under the car.
  14.  
  15. Install lifting hooks on the engine lifting brackets. Attach a suitable hoist to the engine.
  16.  
  17. Remove the jack from under the transmission.
  18.  
  19. Raise the engine and move it toward the front of the car. Use care to avoid damaging components which remain on the car.
  20.  
  21. Support the engine on a workstand.
  22.  
  23. Install the engine by following the removal steps in reverse order. Adjust all of the linkages as detailed in the appropriate sections of this repair guide.
  24.  
  25. Install the hood and adjust it. Replenish the fluid levels in the engine, radiator, and transmission as detailed in General Information & Maintenance in this repair guide.
  26.  



Click image to see an enlarged view

Fig. Fig. 1: In essence, the engine is retained to the vehicle by the engine mounts and the transaxle bolts



Click image to see an enlarged view

Fig. Fig. 2: On FWD vehicles, the transaxle is usually unbolted before the engine is removed

4A-GE Series (RWD)
  1. Disconnect the battery cables (negative cable first), then remove the battery.
  2.  
  3. Remove the hood and the engine undercover splash shield.
  4.  
  5. Remove the No. 2 air cleaner hose. Disconnect the actuator and accelerator cables from their bracket on the cylinder head.
  6.  
  7. From inside the vehicle; remove the center console, lift up the shift boot and remove the shifter.
  8.  
  9. Drain the engine oil and transmission fluid. On automatic transmission equipped vehicles, disconnect the two cooler lines from the radiator.
  10.  
  11. Drain the radiator and engine coolant. Remove the radiator hoses then remove the radiator and shroud.
  12.  
  13. Remove the air cleaner assembly.
  14.  
  15. Remove the power steering pump and the pump mounting bracket.
  16.  
  17. Loosen the water pump pulley set nuts, remove the drive belt adjusting bolt and remove the drive belt.
  18.  
  19. Remove the set nuts, then remove the fluid coupling with the fan and water pump pulley.
  20.  
  21. Remove the air conditioning compressor and its mounting bracket. DO NOT DISCONNECT THE TWO HOSES. Position the compressor (with the hoses connected) to the side and out of the way. Wire the compressor to the frame so it can not slip, and so there is no tension on the hoses.
  22.  
  23. Remove the spark plug wires from the plugs and cover mounting brackets. Disconnect the coil wire. Matchmark and remove the distributor.
  24.  
  25. Remove the exhaust pipe bracket from the pipe and clutch housing.
  26.  
  27. Disconnect, and separate, the exhaust pipe from the exhaust manifold.
  28.  
  29. Disconnect the starter wire harness.
  30.  
  31. Remove the fuel hose from the pulsation damper and pressure regulator
  32.  
  33. Remove the cold start injector pipe. Remove the PCV hose from the intake manifold.
  34.  
  35. Tag and disconnect all related vacuum hoses: Brake booster hose; Charcoal canister hose from the intake manifold; VSV hose from the air valve; Two air valve hoses from the vacuum pipe; and the Vacuum sensing hose from the pressure regulator.
  36.  
  37. Remove the wiring harness and the vacuum pipe from the No. 3 timing cover.
  38.  
  39. Tag and disconnect all the related wires: Two igniter connections; Oil pressure sender gauge connector; Noise filter connector; Relay block connector; Ground strap (between the oil filter retainer and the body); Ground strap connector; Solenoid resistor connector; Four injector connectors; Ground strap from the intake manifold; Ground strap (between the cylinder head and body); Water temperature sender gauge connector; VSV connector; and the Throttle position sensor connector. Position the harness to one side without disconnecting it from the engine.
  40.  
  41. Raise and safely support the front of the vehicle using jackstands.
  42.  
  43. Remove the engine mounting bolts on either side of the engine.
  44.  
  45. Unbolt the clutch release cylinder without disconnecting the hydraulic line and position it out of the way.
  46.  
  47. Disconnect the driveshaft. Tag and disconnect the speedometer cable and the back-up switch connector. Remove the O-ring.
  48.  
  49. Disconnect the bond cables from the clutch and extension housings. Remove the jackstands and carefully lower the vehicle.
  50.  
  51. Attach a suitable engine sling and hoist to the lift bracket on the engine. Support the engine rear mounting on a jack. Remove the rear mounting bolts. Carefully raise the engine and transmission then remove them from the vehicle.
  52.  
  53. Remove the starter, the two stiffener plates and then separate the transmission from the engine.
  54.  
  55. Install the engine and transmission in the reverse order of removal.
  56.  

4A-C and 4A-LC (FWD)
  1. Disconnect the negative battery cable.
  2.  
  3. Matchmark and remove the hood.
  4.  
  5. Remove the air cleaner and all necessary lines attached to it.
  6.  
  7. Drain the radiator.
  8.  
  9. Cover both driveshaft boots with a shop towel.
  10.  
  11. Remove the solenoid valve connector, water temperature switch connector, and the electric fan connector.
  12.  
  13. Remove the exhaust support plate bolts, and the exhaust pipe.
  14.  
  15. Remove the top radiator support.
  16.  
  17. Remove the top and bottom radiator hoses, then remove the radiator with the fan.
  18.  

On cars equipped with automatic transmissions remove the coolant lines before removing the radiator

  1. Remove the windshield washer tank.
  2.  
  3. Remove the heater hoses and the lines to the fuel pump.
  4.  
  5. Remove the accelerator cable, choke cable, and the ground strap.
  6.  
  7. Remove the brake booster vacuum lines.
  8.  
  9. Remove the coil wire and unplug the alternator.
  10.  
  11. Remove the clutch release cable.
  12.  
  13. Remove the wires on the starter.
  14.  
  15. Remove the temperature sending and oil pressure switch connectors.
  16.  
  17. Remove the battery ground strap from the block.
  18.  
  19. Jack up your vehicle and support it safely using jackstands.
  20.  
  21. Remove the engine mounting bolts and the engine shock absorbers.
  22.  
  23. Support the differential with a jack.
  24.  
  25. Remove the transaxle-to-engine mounting bolts.
  26.  

It is probably easier to remove these bolts from underneath the car

  1. Tie the bell housing to the cowl to keep support on the transaxle.
  2.  
  3. Remove the engine from the vehicle. If your vehicle is equipped with an automatic transmission refer to the additional steps located immediately after this procedure.
  4.  

The grille may be removed, if necessary, to give better leverage when removing the engine

  1. Installation is the reverse of removal. Adjust all linkages as covered in the appropriate sections of this repair guide. Refill all fluids to the proper levels, please refer to General Information & Maintenance for details. Tighten transaxle bolts 37-57 ft. lbs. (50-77 Nm).
  2.  
  3. On cars with automatic transmissions, the following procedures are necessary
    1. Remove the starter.
    2.  
    3. Remove the cooling lines from the transmission.
    4.  
    5. Support the transmission with a jack.
    6.  
    7. Remove the transaxle mounting bolts.
    8.  
    9. Remove the torque converter mounting bolts.
    10.  

  4.  

In order to turn the converter, place a wrench on the crankshaft pulley and turn it until you see a bolt appear in the area where the starter was. Loosen and remove the converter-to-flywheel bolts

    1. While the engine is suspended from your hoist, pull it forward about 2 in.
    2.  
    3. Insert a pry bar in this opening and gently separate the torque converter from the engine.
    4.  

  1. Installation is the reverse of removal.
  2.  
  3. Confirm that the converter contact surface is 1.02 in. from the housing. Install a guide bolt in one of the mounting bolt holes. Remove the engine mounting insulator (left side) and the mounting bracket (right side). To secure the transaxle to the engine temporarily install the top two mounting bolts. This will ease engine installation.
  4.  

4A-GE Series (FWD)
  1. Remove the battery and hood. Disconnect the negative cable first when removing the battery. Scribe the hood hinge outline on the underhood to help with installation alignment.
  2.  
  3. Remove the under engine splash shields. Drain the engine oil.
  4.  
  5. Drain the engine coolant from the radiator. If the vehicle is equipped with automatic transaxle, drain the transaxle fluid.
  6.  
  7. Remove the air cleaner assembly. Remove the coolant reservoir tank.
  8.  
  9. Remove the radiator and electric cooling fan assembly. Disconnect the heater hoses from the heater inlet housing.
  10.  
  11. Disconnect the fuel hose from the inlet of the fuel filter. Disconnect the heater and air hoses from the air valve, then disconnect the fuel return line from the pressure regulator.
  12.  
  13. If the vehicle is equipped with a manual transaxle, remove the clutch release cylinder from the transaxle case.
  14.  
  15. Disconnect the charcoal canister vacuum hose. Disconnect the transaxle control cables from the shift levers.
  16.  
  17. Disconnect the speedometer cable from the transaxle case. Disconnect the accelerator link and cruise control cable. Remove the cruise control actuator.
  18.  
  19. Remove the ignition coil.
  20.  
  21. Disconnect the main engine wire by:
    1. Remove the right cowl panel.
    2.  
    3. Disconnect the No. 4 junction block connectors.
    4.  
    5. Remove the Electronic Control Unit (ECU) cover, then disengage the ECU connectors.
    6.  
    7. Pull out the engine main wire to the engine compartment.
    8.  

  22.  
  23. Disconnect the following:
    1. No. 2 junction block connectors.
    2.  
    3. Starter cable from the battery positive post terminal (if not already disconnected).
    4.  
    5. Washer charge valve connector.
    6.  
    7. Cruise control vacuum pump connector.
    8.  
    9. Cruise control vacuum switch connector.
    10.  
    11. Solenoid resistor connector.
    12.  

  24.  
  25. Disconnect the brake booster vacuum line.
  26.  
  27. Disconnect the AC compressor and vane pump by:
    1. Remove the vane pump pulley nut and loosen the pulley.
    2.  
    3. Loosen the idler pulley adjusting bolt and pulley bolt, remove the drive belt.
    4.  
    5. Remove the four compressor mounting bolts and move the compressor WITH THE LINES ATTACHED to the side and secure out of the way.
    6.  
    7. Loosen the bolts mounting the compressor bracket.
    8.  
    9. Disconnect the oil pressure connector.
    10.  
    11. Loosen the vane pump lock bolt and pivot bolts.
    12.  
    13. Remove the vane pump with its mounting bracket and secure it out of the way.
    14.  

  28.  
  29. Remove the oxygen sensor.
  30.  
  31. Disconnect the oil cooler lines.
  32.  
  33. Raise and support the front of the vehicle safely using jackstands.
  34.  
  35. Disconnect the exhaust pipe from the exhaust manifold.
  36.  
  37. Disconnect the front and rear mounting from the crossmember by removing the two hole covers, then removing the two bolts from each mounting.
  38.  
  39. Remove the front mounting bolt and mount.
  40.  
  41. Remove the center engine mounting crossmember.
  42.  
  43. Disconnect the drive axle shafts from the transaxle.
  44.  
  45. Remove the jackstands and carefully lower the front of the vehicle.
  46.  
  47. Attach an engine hoist to the engine.
  48.  
  49. Remove the right hand mounting bracket. Remove the left hand mounting bracket from the transaxle bracket.
  50.  
  51. Carefully lift the engine from the vehicle.
  52.  
  53. Service as required. Install in the reverse order of removal.
  54.  

1C-L Diesel
  1. Drain the engine coolant.
  2.  
  3. Matchmark and remove the hood.
  4.  
  5. Remove the battery, disconnecting the negative cable first.
  6.  
  7. Tag and disconnect all cables attached to the various engine parts.
  8.  
  9. Tag and disconnect all electrical wires attached to the various engine parts.
  10.  
  11. Tag and disconnect all vacuum liens connected to the various engine parts.
  12.  
  13. Remove the cruise control actuator and bracket.
  14.  
  15. Disconnect the radiator and heater hoses.
  16.  
  17. Disconnect the automatic transmission cooler lines at the radiator.
  18.  
  19. Unbolt the two radiator supports and lift out the radiator.
  20.  
  21. Remove the air cleaner assembly.
  22.  
  23. Disconnect all wiring and linkage at the transmission.
  24.  
  25. Pull out the injection system wiring harness and secure to the right side fender apron.
  26.  
  27. Disconnect the fuel lines at the fuel filter and return pipes.
  28.  
  29. Disconnect the speedometer cable at the transmission.
  30.  
  31. Remove the clutch release cylinder without disconnecting the fluid line.
  32.  
  33. Unbolt the air conditioning compressor and secure it out of the way.
  34.  
  35. Raise and support the car safely using jackstands.
  36.  
  37. Drain the transaxle fluid.
  38.  
  39. While someone holds the brake pedal depressed, unbolt both axle shafts. It's a good idea to wrap the boots with shop towels to prevent grease loss and help protect the boots from damage.
  40.  
  41. Unbolt the power steering pump and secure it out of the way.
  42.  
  43. Disconnect the exhaust pipe from the manifold.
  44.  
  45. Disconnect the front and rear engine mounts at the frame member.
  46.  
  47. Lower the vehicle.
  48.  
  49. Attach an engine crane at the lifting eyes.
  50.  
  51. Take up the engine weight with the crane, then remove the right and left side engine mounts.
  52.  
  53. Slowly and carefully, remove the engine and transaxle assembly.
  54.  
  55. Installation is the reverse of removal. Torque the engine mount bolts to 29 ft. lbs. (40 Nm). Torque the axle shaft bolts to 27 ft. lbs. (37 Nm). Torque the fuel line connectors to 22 ft. lbs. (30 Nm).
  56.  

 
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