Toyota Tercel 1984-1994 Repair Guide

Timing Belt and Camshaft Sprocket

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REMOVAL & INSTALLATION



See Figures 1 through 21

On vehicles frequently idled for extensive periods and/or driven for long distances at low speeds, it is recommended to change the timing belt at 60,000 mile (96,000km) intervals.

Timing belts must always be handled carefully and kept completely free of dirt, grease, fluids and lubricants. This includes any accidental contact from spillage. These same precautions apply to the pulleys and contact surfaces on which the belt rides. The belt must never be crimped, twisted or bent. Never use tools to pry or wedge the belt into place. Such actions will damage the structure of the belt and possibly cause breakage.

3A and 3A-C Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the radiator.
  4.  
  5. Remove the air cleaner assembly and the drive belts.
  6.  
  7. Remove the rocker arm (valve) cover.
  8.  
  9. Rotate the crankshaft clockwise to the TDC position on the compression stroke for No. 1 cylinder. Insure that the crankshaft marks align at zero and that the rocker arms on No. 1 cylinder are loose.
  10.  
  11. Remove the timing belt covers using the procedures described earlier in this section.
  12.  
  13. Remove the timing belt guide.
  14.  
  15. If reusing the belt, make matchmarks on the belt and both pulleys showing the exact placement of the belt. Mark an arrow on the belt showing its direction of rotation.
  16.  
  17. Loosen the timing belt idler pulley mount bolt, push it as far left as it will go and temporarily tighten the bolt. This will relieve tension from the belt.
  18.  
  19. Carefully slip the timing belt off the pulleys.
  20.  
  21. Remove the idler pulley mount bolt, pulley and return spring.
  22.  

Do not disturb the position of the camshaft or the crankshaft during removal.

  1. Use an adjustable wrench mounted on the flats of the camshaft to hold the cam from moving. Loosen the center bolt in the camshaft sprocket and remove the sprocket.
  2.  
  3. Check the timing belt carefully for any signs of cracking or deterioration. Pay particular attention to the area where each tooth or cog attaches to the backing of the belt. If the belt shows signs of damage, check the contact faces of the pulleys for possible burrs or scratches.
  4.  
  5. Check the idler pulley by holding it in your hand and spinning it. It should rotate freely and quietly. Any sign of grinding or abnormal noise indicates a need to replace the pulley.
  6.  
  7. Check the free length of the tension spring. Correct length is 1.512 in. (38.4mm) measured at the inside faces of the hooks. A spring which has stretched during use will not apply the correct tension to the pulley; replace the spring.
  8.  
  9. Test the tension of the spring. It should have 8 lbs. (3.83 kg) of tension at 1.976 in. (50.2mm) of length. If in doubt, replace the spring.
  10.  

To install:
  1. Align the pin of the camshaft with the hole in the sprocket, then install the camshaft timing belt sprocket. Tighten the center bolt to specification.
  2.  
  3. Before reinstalling the belt, double check that the crank and camshafts are exactly in their correct positions. The alignment mark on the end of the camshaft bearing cap should show through the small hole in the camshaft pulley and the small mark on the crankshaft timing belt pulley should align with the mark on the oil pump.
  4.  
  5. Reinstall the timing belt idler pulley and the tension spring. Pry the pulley to the left as far as it will go and temporarily tighten the retaining bolt. This will hold the pulley in its loosest position.
  6.  
  7. Install the timing belt, observing the matchmarks made earlier. Make sure the belt is fully and squarely seated on the upper and lower pulleys.
  8.  
  9. Loosen the retaining bolt for the timing belt idler pulley and allow it to tension the belt.
  10.  
  11. Temporarily install the crankshaft pulley bolt and turn the crank clockwise two full revolutions from TDC to TDC. Insure that each timing mark realigns exactly.
  12.  

Always turn the crankshaft clockwise!

  1. Tighten the timing belt idler pulley retaining bolt to 27 ft. lbs. (37 Nm).
  2.  
  3. Measure the timing belt deflection, look for 0.24-0.28 in. (6-7mm) of deflection at 4.4 pounds (2 kg) of pressure. If the deflection is not correct, readjust the idler pulley.
  4.  
  5. Remove the bolt from the end of the crankshaft.
  6.  
  7. Install the valve cover.
  8.  
  9. Install the timing belt guide onto the crankshaft and install the timing belt covers.
  10.  
  11. Install air cleaner assembly and the accessory belts.
  12.  
  13. Adjust the accessory belts and install the radiator.
  14.  
  15. Refill the radiator. Start the engine and check for leaks.
  16.  



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Fig. Fig. 1: Timing belt and components on 3A and 3A-C engines



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Fig. Fig. 2: 3E and 3E-E timing belt and components



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Fig. Fig. 3: The engine should be set to TDC on the compression stroke



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Fig. Fig. 4: Marking the timing belt position



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Fig. Fig. 5: Because belt tension is determined by the idler pulley position, the center mounting bolt must be loosened when removing the belt



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Fig. Fig. 6: Tension is removed from the belt when the idler pulley is at the full left position



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Fig. Fig. 7: Removing the tension spring



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Fig. Fig. 8: Removing the timing belt lower cover on 3A and 3A-C engines



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Fig. Fig. 9: Removing the timing belt guide



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Fig. Fig. 10: Hold the camshaft on the flats provided, NOT on the lobes

3E and 3E-E Engines

CAUTION
On models equipped with a Supplemental Restraint System (SRS) or "air bag,'' work must NOT be started until at least 90 seconds have passed from the time the ignition switch is turned to the LOCK position and the negative cable is disconnected from the battery.

  1. Disconnect the negative battery cable. Remove the right side engine under cover. On 3E-E engines, disconnect the accelerator and throttle cables.
  2.  
  3. Disconnect the PCV hoses.
  4.  
  5. Remove the drive belts. Remove the air cleaner, air intake collector assemblies and the spark plugs.
  6.  
  7. Remove the ground strap and vacuum transmitting valves from the right hand engine mounting insulator.
  8.  
  9. Slightly raise the engine and remove the right side engine mounting insulator assembly.
  10.  
  11. Remove the valve cover. Set the engine to TDC on the compression stroke. Remove the crankshaft pulley using the procedures described earlier.
  12.  
  13. Remove both timing belt covers and the timing belt guide.
  14.  
  15. If using the old belt, matchmark it in the direction of engine rotation and the position on the pulleys.
  16.  
  17. Remove the tension spring. Loosen the timing belt idler pulley mount bolt, push it as far left as it will go and temporarily tighten it.
  18.  
  19. Carefully slip the timing belt off the pulleys.
  20.  
  21. Remove the idler pulley mount bolt and pulley.
  22.  

Do not disturb the position of the camshaft or the crankshaft during removal.

  1. Use an adjustable wrench mounted on the flats of the camshaft to hold the cam from moving. Loosen the center bolt in the camshaft sprocket and remove the sprocket.
  2.  
  3. Check the timing belt carefully for any signs of cracking or deterioration. Pay particular attention to the area where each tooth or cog attaches to the backing of the belt. If the belt shows signs of damage, check the contact faces of the pulleys for possible burrs or scratches.
  4.  
  5. Check the idler pulley by holding it in your hand and spinning it. It should rotate freely and quietly. Any sign of grinding or abnormal noise indicates a need to replace the pulley.
  6.  
  7. Check the free length of the tension spring. Correct length is 1.512 in. (38.4mm) measured at the inside faces of the hooks. A spring which has stretched during use will not apply the correct tension to the pulley; replace the spring.
  8.  
  9. Test the tension of the spring. It should have 11.3 lbs. (5.11 kg) of tension at 2.028 in. (51.5mm) of length. If in doubt, replace the spring.
  10.  

To install:
  1. To install the camshaft timing sprocket, align the camshaft pin with the No. 1 camshaft bearing cap mark. Align the pin hole under the 3E mark with the camshaft pin and install it on the camshaft. Torque the retaining bolt to 37 ft. lbs. (50 Nm).
  2.  
  3. Align the TDC marks on the oil pump body and the crankshaft timing pulley. Install the idler pulley and pry the pulley toward the left as far as it will go, then temporarily tighten the retaining bolt.
  4.  
  5. Install the timing belt. If reusing the old belt, align it with the marks made during the removal procedure.
  6.  
  7. Inspect the valve timing and the belt tension. Install the tension spring and loosen the idler pulley set bolt. Temporarily install the crankshaft pulley bolt and turn the crankshaft 2 complete revolutions. Always turn the crankshaft in the clockwise direction.
  8.  
  9. Check that each pulley aligns with the proper markings. Torque the idler pulley bolt to 13 ft. lbs. (18 Nm).
  10.  
  11. Check for proper belt tension. The belt should have tension between the oil pump pulley and the No. 2 idler pulley (this is the idler pulley without the tension spring attached to it). Install the belt guide.
  12.  
  13. Install the timing belt covers. Align and install the crankshaft pulley. Torque the pulley bolt to 112 ft. lbs. (152 Nm).
  14.  
  15. Installation of the remaining components is the reverse of the removal procedure. Service components as required. Make all necessary engine adjustments and roadtest for proper operation.
  16.  



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Fig. Fig. 11: Correct timing mark placement on 3E and 3E-E engines



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Fig. Fig. 12: The timing belt should not come in contact with oil, water or steam. Never bend or twist the timing belt



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Fig. Fig. 13: The timing belt should be inspected for cracks and missing teeth



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Fig. Fig. 14: The idler pulley should turn smoothly



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Fig. Fig. 15: Spring free length should be measured from these points



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Fig. Fig. 16: Correct camshaft timing mark placement on 3A and 3A-C engines



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Fig. Fig. 17: Aligning the marks on the crankshaft for 3A and 3A-C engines



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Fig. Fig. 18: The timing belt should be rotated two revolutions in a clockwise direction, then the timing marks should be rechecked for correct placement



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Fig. Fig. 19: Correct belt tension for 3A and 3A-C engines



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Fig. Fig. 20: When installing the camshaft sprocket on 3E and 3E-E engines, the 3E mark must align with the camshaft knock pin hole as shown



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Fig. Fig. 21: On 3E and 3E-E engines, check that there is tension on the belt at this point

 
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