Honda Accord/Civic/Prelude 1973-1983 Repair Guide

Engine

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REMOVAL & INSTALLATION




WARNING
If any repair operation requires the removal of a component of the air conditioning system (on vehicles equipped), do not disconnect the refrigerant lines. If it is impossible to move the component out of the way with the lines attached, have the air conditioning system evacuated by a trained serviceman. The air conditioning system contains freon under pressure. This gas can be very dangerous. Therefore, under no circumstances should an untrained person attempt to disconnect the air conditioner refrigerant lines.

1170 and 1237cc Civic

See Figures 1 and 2

  1. Raise and support the front of the vehicle with safety stands.
  2.  
  3. Remove the front wheels.
  4.  


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.

  1. Drain the oil from the engine and transaxle. Place a clean container under the radiator and drain the cooling system.
  2.  
  3. Remove the front turn signal lights and grille.
  4.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. Remove the hood support bolts and the hood. Remove the fan shroud, if equipped.
  2.  
  3. Remove the air cleaner case and air intake pipe at the air cleaner.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of 1170cc 1237cc and 1335cc engines



Click image to see an enlarged view

Fig. Fig. 2: Driving gearshift rod pin out using a tool

  1. Disconnect the battery and engine ground cables at the battery and the valve cover.
  2.  
  3. Disconnect the hose from the fuel vapor storage canister at the carburetor.
  4.  
  5. Disconnect the fuel line at the fuel pump.
  6.  

Plug the line so that gas does not siphon from the tank.

  1. Disconnect the lower coolant hose from the water pump connecting tube and the upper hose from the thermostat cover.
  2.  
  3. Disconnect the following control cables and wires from the engine:
    1. Throttle and choke cables from the carburetor.
    2.  
    3. Clutch cable from the release arm.
    4.  
    5. Ignition coil wires from the distributor.
    6.  
    7. Starter motor positive battery cable connection and solenoid wire.
    8.  
    9. Back-up light switch and the TCS (Transmission Controlled Spark) switch wires from the transmission casing.
    10.  
    11. Speedometer and tachometer cables.
    12.  

  4.  


WARNING
When removing the speedometer cable from the transaxle, it is not necessary to remove the entire cable holder. Remove the end boot (gear holder seal) and the cable retaining clip, then, pull the cable out of the holder. In no way should you disturb the holder unless it is absolutely necessary!The holder consists of three pieces: the holder, collar and a dowel pin. The dowel pin indexes the holder and collar and is held in place by the bolt that retains the holder. If the bolt is removed and the holder rotated, the dowel pin can fall into the transmission case, necessitating transaxle disassembly to remove the pin. To insure that this does not happen when the holder must be removed, do not rotate the holder more than 30° in either direction when removing it. Once removed, make sure that the pin is still in place. Use the same precaution when installing the holder.

    1. Alternator wire and wire harness connector.
    2.  
    3. The wires from both water temperature thermal switches on the intake manifold.
    4.  
    5. Cooling fan connector and radiator thermoswitch wires.
    6.  
    7. Oil pressure sensor.
    8.  
    9. On 1975-76 models, vacuum hose to throttle opener at opener and vacuum hose from carburetor insulator to throttle opener.
    10.  
    11. On 1976-77 models, bypass valve assemble and bracket.
    12.  


It would be a good idea to tag all of these wires to avoid confusion during installation.

  1. Disconnect the heater hose by removing the H connector from the two hoses in the firewall.
  2.  
  3. Remove the engine torque rod from the engine and firewall.
  4.  
  5. Remove the starter motor.
  6.  
  7. Remove the radiator from the engine compartment.
  8.  
  9. Remove the exhaust pipe-to-manifold clamp.
  10.  
  11. Remove the exhaust pipe flange nuts and lower the exhaust pipe.
  12.  
  13. Using a Ball Joint Remover tool No. 07941-6340000 or equivalent, disconnect the left and right lower control arm ball joints from the steering knuckle.
  14.  
  15. Hold the brake disc, then, pull the both halfshafts from the differential case.
  16.  
  17. Depending on the transaxle used, perform the following procedures:
    1. Manual transaxle: Using a drift punch, drive out the gearshift rod pin (8mm) and disconnect the rod at the transaxle case.
    2.  

  18.  

Do not disconnect the shift lever end of the gearshift rod and extension.

    1. Hondamatic only: Disconnect shift cable from the console and the cooler line from the transaxle.
    2.  


  1. If equipped with a manual transaxle, disconnect the gearshift extension from the engine.
  2.  
  3. Install two engine hanger bolts in the torque rod bolt hole and the bolt hole to the left of the distributor. Install a lift chain on the hanger bolts and lift the engine, slightly, to take the load off the engine mounts.
  4.  
  5. When the engine is properly supported, remove the two center mount bracket nuts.
  6.  
  7. On the 1973-74 models, remove the center beam.
  8.  
  9. Remove the left engine mount.
  10.  
  11. Lift the engine out slowly, taking care not to allow the engine to damage other parts of the vehicle.
  12.  
  13. To install, reverse the removal procedure. Pay special attention to the following points:
    1. Lower the engine into position and install the left mount. On 1973-74 models, install the center beam with the front end between the stabilizer bar and frame; DO NOT attach mounting bolts at this time.
    2.  

  14.  

On 1973-74 models, be sure that the lower mount has the mount stop installed between the center beam and the rubber mount.

    1. Align the center mount studs with the beam, then, tighten the nuts several turns (just enough to support the beam). On 1973-74 models, attach the rear end of the center beam to the subframe.
    2.  
    3. On 1973-74 models, attach the front end of the center beam. Torque the center beam bolts but do not tighten the lower mount nuts. Lower the engine so it rests on the lower mount. Torque the lower mount nuts.
    4.  
    5. Use a new shift rod pin.
    6.  
    7. After installing the halfshafts, attempt to move the inner joint housing in and out of the transaxle housing. If it moves easily, the driveshaft end clips should be replaced.
    8.  
    9. Make sure that the control cables and wires are connected properly.
    10.  
    11. When connecting the heater hoses, the upper hose goes to the water pump connecting pipe and the lower hose to the intake manifold.
    12.  
    13. Refill the engine, transaxle and cooling system with their respective fluids to the proper levels.
    14.  
    15. On Hondamatic vehicles, check and/or adjust the shift cable.
    16.  


1335cc and 1487cc Civic

See Figures 3 and 4

  1. Raise and support the front of the vehicle on jackstands. Remove both front wheels.
  2.  
  3. Remove the headlight rim screws and the rims. On 1980-82 models, remove the battery, tray and mount.
  4.  
  5. Open the hood and disconnect both parking light connectors. Remove the parking light bolts, backing plate and the parking lights.
  6.  



Click image to see an enlarged view

Fig. Fig. 3: Exploded view of CVCC cylinder block



Click image to see an enlarged view

Fig. Fig. 4: Speedometer cable removal

  1. Remove the lower grille molding, the grille-to-vehicle retaining bolts and the grille.
  2.  
  3. Disconnect and remove the windshield washer hose from the underside of the hood.
  4.  
  5. Disconnect the negative battery cable and the transaxle bracket-to-body ground cable.
  6.  
  7. Remove the upper torque (engine locating) arm.
  8.  
  9. Disconnect the vacuum hose from the power brake booster, thermosensors A and B at their wiring connectors and the coolant temperature gauge sending unit wire.
  10.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. Drain the cooling system. After all coolant has drained, install the drain bolt fingertight.
  2.  
  3. Disconnect all four coolant hoses. Disconnect cooling fan motor connector and the temperature sensor. Remove the radiator hose to the overflow tank.
  4.  
  5. If equipped with a Hondamatic, remove both ATF cooler line bolts.
  6.  

Save the washers from the cooler line banjo connectors and replace if damaged.

  1. Remove the radiator.
  2.  
  3. Label and disconnect the starter motor wires. Remove the starter-to-engine bolts (one from each end of the starter) and the starter.
  4.  
  5. Label and disconnect the spark plug wires from the plugs. Remove the distributor cap and scribe the position of the rotor on the side of the distributor housing. Remove the top distributor swivel bolt and the distributor (the rotor will rotate 30° as the drive gear is beveled).
  6.  
  7. If equipped with a manual transaxle, remove the C-clip retaining the clutch cable at the firewall. To remove the end of the clutch cable from the clutch release arm and bracket: First, pull up on the cable, then, push it out to release it from the bracket. Remove the end from the release arm.
  8.  
  9. Disconnect the backup light switch wires. Disconnect the control valve vacuum hose, the air intake hose and the preheat air intake hose. Disconnect the air bleed valve hose from the air cleaner. Label and disconnect all remaining vacuum hoses from the underside of the air cleaner. Remove the air cleaner.
  10.  
  11. Label and disconnect all remaining emission control vacuum hoses from the engine. Disconnect the emission box wiring connector and remove the black emission box from the firewall.
  12.  
  13. Remove the engine mount heat shield.
  14.  
  15. Disconnect the engine-to-body ground strap at the valve cover.
  16.  
  17. Disconnect the alternator wiring connector and oil pressure sensor leads.
  18.  
  19. Disconnect the vacuum hose from the start control and electrical leads to both cut-off solenoid valves.
  20.  
  21. Disconnect the vacuum hose from the charcoal canister and both fuel lines from the carburetor. Mark the adjustment, then, disconnect the choke and throttle cables from the carburetor.
  22.  
  23. If equipped with a Hondamatic, remove the center console and disconnect the gear selector control cable at the console. This may be accomplished after removing the retaining clip and pin.
  24.  
  25. Drain the transaxle oil.
  26.  
  27. Remove the fender well shield under the right fender, exposing the speedometer drive cable. Remove the set screw securing the speedometer drive holder, then, slowly pull the cable assembly out of the transaxle, taking care not to drop the pin or drive gear. Finally, remove the pin, collar and drive gear from the cable assembly.
  28.  
  29. Disconnect the front suspension stabilizer bar from its mounts on both sides. Also, remove the bolt retaining the lower control arm to the sub-frame on both sides.
  30.  
  31. Remove the forward mounting nut on the radius rod from both sides. Pry the constant velocity joint out about 1 / 2 in. and pull the stub axle out of the transaxle case; repeat this procedure for the other side.
  32.  
  33. Remove the center beam-to-chassis bolts and the center beam.
  34.  
  35. If equipped with a manual transaxle, drive the retaining pin from the shift linkage.
  36.  
  37. Disconnect the lower torque arm from the transaxle.
  38.  
  39. If equipped with a Hondamatic, remove the control cable stay-to-transaxle bolt. Loosen the two U-bolt nuts and pull the cable out of its housing.
  40.  
  41. Disconnect the exhaust pipe from the manifold. Disconnect the retaining clamp also.
  42.  
  43. Remove the rear engine mount nut.
  44.  
  45. Attach a lifting hoist to the engine. Honda recommends using the threaded bolt holes at the extreme right and left ends of the cylinder head (with special hardened bolts) as lifting points, as opposed to wrapping a chain around the entire block and risk damaging some components such as the carburetor, etc.
  46.  
  47. Raise the engine to place a slight tension on the chain. Remove the front engine mount nut and bolts. Raise the engine and remove the mount.
  48.  
  49. Remove the three retaining bolts and push the left engine support into its shock mount bracket to the limit of its travel.
  50.  
  51. Slowly lift the engine from the vehicle.
  52.  
  53. To install, reverse the removal procedures. Refill the cooling system, the engine and the transaxle with the correct fluids. Start the engine, allow it to reach normal operating temperatures and check for leaks.
  54.  

1600cc Accord and 1751cc Accord/Prelude

See Figures 5, 6 and 7

  1. Disconnect the negative battery terminal.
  2.  



Click image to see an enlarged view

Fig. Fig. 5: Accord and Prelude component removal points



Click image to see an enlarged view

Fig. Fig. 6: Accord and Prelude engine removal. Note position of chain.



Click image to see an enlarged view

Fig. Fig. 7: Halfshaft removal

  1. Drain the cooling system, the engine and transaxle of fluids.
  2.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old. 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.

  1. Raise and support the front of the vehicle, then, remove the front wheels.
  2.  
  3. Remove the air cleaner.
  4.  
  5. Remove the following wires and hoses:
    1. The coil wire and the ignition primary wire from the distributor.
    2.  
    3. The engine subharness and the starter wires; mark the wires before removal to ease installation.
    4.  
    5. The vacuum tube from the brake booster.
    6.  
    7. On Hondamatic models, remove the ATF cooler hose from the transaxle.
    8.  
    9. The engine ground cable.
    10.  
    11. Alternator wiring harness.
    12.  
    13. Carburetor solenoid valve connector.
    14.  
    15. Carburetor fuel line.
    16.  
    17. On models with California and high altitude equipment, disconnect the hoses from the air controller.
    18.  

  6.  
  7. Remove the choke and throttle cables.
  8.  
  9. Remove the radiator and heater hoses.
  10.  
  11. Remove the emission control black box.
  12.  
  13. Remove the clutch slave cylinder with the hydraulic line attached.
  14.  
  15. Remove the speedometer cable. Pull the wire clip from the housing and the cable from the housing: DO NOT, under any circumstances, remove the housing from the transaxle.
  16.  
  17. Using an engine hoist, raise the engine slightly to remove the slack from the chain.
  18.  
  19. To disconnect the right or left lower ball joints and the tie rod ends, perform the following procedures:
    1. Remove the cotter pin and nut from the ball joint(s) and the tie rod end(s).
    2.  
    3. Using a Ball Joint Remover tool or equivalent, separate the ball joint(s) and tie rod(s) from the steering knuckle.
    4.  
    5. An alternative method is to leave the ball joints connected, then, remove the lower control arm inner bolts and the radius rods from the lower control arms.
    6.  

  20.  
  21. To remove the halfshafts from the transaxle, pry the snapring from the groove in the end of the shaft. While holding the steering knuckle, pull the halfshaft from the knuckle.
  22.  
  23. Remove the center engine mount.
  24.  
  25. Remove the shift rod positioner from the transaxle case.
  26.  
  27. Using a Pin Punch, drive the pin from the shift rod.
  28.  
  29. If equipped with a Hondamatic, remove the control cable from the transaxle.
  30.  
  31. Disconnect the exhaust pipe from the exhaust manifold.
  32.  
  33. Remove the three engine support bolts and push the left engine support into the shock mount bracket.
  34.  
  35. Remove the front and rear engine mounts.
  36.  
  37. Carefully, raise and remove the engine from the vehicle.
  38.  
  39. To install, reverse the removal procedures. Make sure the halfshaft clip seats in the transaxle groove; failure to do so could lead to the halfshaft disengaging from the transaxle while you are driving! Bleed the air from the cooling system. Adjust the throttle and choke cable tension. Check and/or adjust the clutch for the correct free play. Make sure that the transaxle shifts properly.
  40.  

1829cc Prelude

See Figure 8

  1. Apply the parking brake and place blocks behind the rear wheels. Raise and support the front of the vehicle on jackstands.
  2.  
  3. Disconnect the negative, then, the positive battery terminals from the battery. Remove the battery and the battery tray from the engine compartment.
  4.  



Click image to see an enlarged view

Fig. Fig. 8: Component removal points-1983 Prelude

  1. Remove the knob caps covering the headlight manual retracting knobs, then, turn the knobs to bring the headlights to the ON position. Remove the five grille screws and the grille.
  2.  
  3. From under the engine, remove the splash guard. Using a scratch awl, mark the hood hinge outline on the hood, then, remove the hood bolts and the hood.
  4.  
  5. Remove the oil filler cap and drain the engine oil.
  6.  

When replacing the drain plug be sure to use a new washer.


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.

  1. Remove the radiator cap, then, open the radiator drain petcock and drain the coolant from the radiator.
  2.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by the ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. Remove the transaxle filler plug, then, remove the drain plug and drain the transaxle.
  2.  
  3. Perform the following procedures:
    1. Label and remove the coil wires and the engine secondary ground cable located on the valve cover.
    2.  
    3. Remove the air cleaner cover and filter.
    4.  
    5. Loosen the throttle cable locknut and adjusting nut, then, slip the cable end from the carburetor linkage.
    6.  

  4.  

Be careful not to bend or kink the throttle cable. Always replace a damaged cable.

    1. Disconnect the No. 1 control box connector, then, remove the control box from its bracket and allow it hang next to the engine.
    2.  
    3. Disconnect the fuel line from the fuel filter and the solenoid vacuum hose from the charcoal canister.
    4.  
    5. For California and high altitude models, remove the air jet controller.
    6.  


  1. Label and disconnect the radiator and heater hoses from the engine.
  2.  
  3. If equipped with an automatic transaxle, disconnect the oil cooler hoses from the transaxle and drain the fluid, then, support the hoses near the radiator.
  4.  
  5. If equipped with a manual transaxle, loosen the clutch cable adjusting nut and remove the clutch cable from the release arm.
  6.  
  7. Disconnect the battery cable from the transaxle and the starter cable from the starter motor terminal.
  8.  
  9. Disconnect both electrical harness connectors from the engine.
  10.  
  11. Remove the speedometer cable clip, then, pull the cable from the holder.
  12.  

DO NOT remove the holder as the speedometer gear may drop into the transaxle.

  1. If equipped with power steering perform the following procedures:
    1. Remove the speed sensor-to-transaxle bolt and the sensor complete with the hoses.
    2.  

  2.  

DO NOT disconnect the hoses from the speed sensor, for power steering fluid will flow from it.

    1. Remove the power steering pump adjusting bolt, mounting bolt and the V-belt.
    2.  
    3. Without disconnecting the hoses, pull the pump away from its mounting bracket and position it out of the way.
    4.  
    5. Remove the power steering hose bracket from the cylinder head.
    6.  


  1. If equipped with air conditioning, perform the following procedures:
    1. Remove the compressor clutch lead wire.
    2.  
    3. Loosen the belt adjusting bolt and the drive belt.
    4.  

  2.  

DO NOT remove the air conditioner hoses. The air conditioner compressor can be moved without discharging the air conditioner system.

    1. Remove the compressor mounting bolts, then, lift the compressor out of the bracket, with the hoses attached, and support it on the front bulkhead with a piece of wire.
    2.  


  1. If equipped with a manual transaxle, remove the shift rod yoke attaching bolt and disconnect the shift lever torque rod from the clutch housing.
  2.  
  3. If equipped with an automatic transaxle, perform the following procedures:
    1. Remove the center console.
    2.  
    3. Place the shift lever in Reverse, then, remove the lock pin from the end of the shift cable.
    4.  
    5. Remove the shift cable mounting bolts and the shift cable holder.
    6.  
    7. Remove the throttle cable from the throttle lever. Loosen the lower locknut, then, remove the cable from the bracket.
    8.  

  4.  

DO NOT loosen the upper locknut as it will change the transaxle shift points.

  1. Disconnect the right and left lower ball joints and the tie rod ends.
  2.  
  3. To remove the halfshafts, perform the following procedures:
    1. Remove the jackstands and lower the vehicle. Using a 32mm socket, loosen the spindle nuts. Raise and support the vehicle on jackstands.
    2.  
    3. Remove the front wheel and the spindle nut.
    4.  
    5. Remove the damper fork and damper pinch bolts.
    6.  
    7. Remove the ball joint bolt and separate the ball joint from the lower control arm.
    8.  
    9. Disconnect the tie rods from the steering knuckles.
    10.  
    11. Pull the front hub outward and off the halfshafts.
    12.  
    13. Using a small pry bar, pry out the inboard CV-joint approximately 1 / 2 inch to release the spring clip from the differential, then, pull the halfshaft from the transaxle case.
    14.  

  4.  

When installing the halfshaft, insert the shaft until the spring clip clicks into the groove. Always use a new spring clip when installing halfshafts.

  1. Remove the exhaust header pipe.
  2.  
  3. Attach a chain hoist to the engine and raise it slightly to remove the slack.
  4.  
  5. Disconnect the No. 2 control box connector, lift the control box off of its bracket and allow it hang next to the engine.
  6.  
  7. If equipped with air conditioning, remove the idle control solenoid valve.
  8.  
  9. If equipped with an air chamber, remove it.
  10.  
  11. From under the air chamber, remove the three engine mount bolts, then, push the engine mount into the engine mount tower.
  12.  
  13. Remove the front and rear engine mount nuts.
  14.  
  15. Loosen the alternator bolts and remove the drive belt. Disconnect the alternator wire harness and remove the alternator.
  16.  
  17. At the engine, remove the bolt from the rear torque rod, then, loosen the bolt in the frame mount, swing the rod up and out of the way.
  18.  
  19. Carefully raise the engine from the vehicle, checking that all wires and hoses have been removed from the engine/transaxle, then, remove it from the vehicle.
  20.  
  21. To install the engine, reverse the removal procedures and make the following checks:
    1. Torque the engine mounting bolts in the proper sequence.
    2.  
    3. Bleed the air from the cooling system.
    4.  
    5. Adjust the clutch pedal free play.
    6.  
    7. Adjust the throttle cable tension.
    8.  
    9. Make sure the transaxle shifts properly.
    10.  

  22.  

 
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