Toyota Corolla 1970-1987 Repair Guide

Timing Belt

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REMOVAL & INSTALLATION



A-Series Engines (SOHC)

See Figures 1 and 2

  1. Remove the timing belt upper and lower covers, along with their gaskets as previously detailed.
  2.  

It is always a good idea to set the engine on TDC and note the position of any pulley alignment marks before removing the timing belt

  1. If the timing belt is to be reused, mark an arrow in the direction of engine revolution on its surface. Matchmark the belt to the pulleys using tape, a marker or a small dab of paint.
  2.  
  3. Loosen the idler pulley bolt, push it to the left as far as it will go, then temporarily tighten it.
  4.  
  5. Remove the timing belt, idler pulley bolt, idler pulley and the return spring.
  6.  

Do not bend, twist, or turn the belt inside out. Do not allow grease or water to come in contact with it

  1. Inspect the timing belt for cracks, missing teeth or overall wear. Replace as necessary.
  2.  

To install:
  1. Install the return spring and idler pulley.
  2.  
  3. Install the timing belt. Align the marks made earlier if reusing the old belt.
  4.  
  5. Adjust the idler pulley so that the belt deflection is 0.24-0.28 in. at 4.5 lbs.
  6.  
  7. Check the valve timing. This is accomplished by rotating the engine 2 complete clockwise revolutions from No. 1 TDC to No. 1 TDC and making sure that each pulley aligns with the appropriate timing marks.
  8.  
  9. Installation of the remaining components is in the reverse order of removal.
  10.  



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Fig. Fig. 1: Mark the timing belt before removal-A-series engines



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Fig. Fig. 2: Check the valve timing by turning the engine 2 complete clockwise revolutions and checking to see if the timing marks are properly aligned

4A-GE Series (DOHC)

See Figures 3, 4, 5 and 6

  1. Disconnect the negative battery cable. Disconnect the air cleaner hose from the throttle intake.
  2.  
  3. If the vehicle is equipped with power steering, remove the pump (with hoses attached) and position it out of the way.
  4.  
  5. Loosen the water pump pulley set nuts, remove the drive belt adjusting bolt, then remove the drive belt. Remove the set nuts, fluid coupling, fan and water pump pulley.
  6.  
  7. Remove the spark plugs. Rotate the crankshaft so that the timing groove on the pulley is in alignment with the timing mark (0) on the timing cover. Remove the oil filler cap and check to see that the cavity in the camshaft is visible. If the cavity is not visible, turn the crankshaft until the timing marks are lined up again, and recheck.
  8.  
  9. Lock the crankshaft pulley and remove the pulley mounting bolt. Use a suitable puller to remove the crank pulley. Remove the three timing covers and their gaskets. Remove the timing belt guide.
  10.  
  11. Matchmark the camshaft pulleys to the inner case and timing belt (if the old belt is to be reused. Also mark the old belt for rotation direction).
  12.  



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Fig. Fig. 3: When setting the 4A-GE engine to No. 1 TDC, remove the oil filler cap and check that the camshaft cavity is visible



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Fig. Fig. 4: Make sure all gear timing marks are properly aligned



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Fig. Fig. 5: If the belt is to be reused, place matchmarks on the camshaft timing pulleys and the belt (also mark the belt's direction of rotation)-4A-GE engine

  1. Loosen the idler pulley mounting bolts and move the idler pulley as far to the left as possible. Secure the pulley in the far left position. Remove the timing belt. Remove the idler pulley and the tensioner spring if servicing is required.
  2.  

To install:
  1. Service the engine as required.
  2.  
  3. Install the timing belt making sure all matchmarks and timing marks are aligned. Use care when installing the belt so that the camshaft pulleys are not moved out of position.
  4.  
  5. Set the idler pulley in to position so that belt deflection is 0.16 in. at 4.4 lbs. Apply more or less tension as required.
  6.  
  7. Turn the engine, clockwise, two complete revolutions and recheck timing mark alignment. Readjust if necessary. The idler pulley mounting bolts should be torqued to 27 ft. lbs. (37 Nm).
  8.  
  9. Install the remaining components in the reverse order of removal.
  10.  



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Fig. Fig. 6: When installing the crankshaft pulley, make sure the TDC marks on the oil pump body and the pulley are in alignment-4A-GE

1C-L Diesel Engines

See Figures 7 and 8

  1. Remove the engine timing covers as previously detailed.
  2.  
  3. Raise the engine slightly with a jack and a block of wood. Disconnect the right engine mount from its bracket.
  4.  
  5. Lower the engine, then remove the right engine mount.
  6.  

Before removing a timing belt or chain it is always a good idea to set the engine to TDC. Make sure all appropriate timing marks are aligned

  1. If the timing belt is to be reused, mark an arrow in the direction of engine rotation on its surface. Matchmark the belt to the pulleys as shown in the illustration.
  2.  



Click image to see an enlarged view

Fig. Fig. 7: If the timing belt is to be reused, matchmark it to the pulleys and mark the direction of rotation-1C-L diesel engine



Click image to see an enlarged view

Fig. Fig. 8: During belt installation, make sure all timing marks are properly aligned

  1. Use a screwdriver and remove the idler pulley tension spring.
  2.  


CAUTION
Don't pinch the spring with pliers!

  1. Loosen the idler pulley bolt, push it to the left as far as it will go, then temporarily tighten it.
  2.  
  3. Remove the timing belt.
  4.  


CAUTION
Do not bend, twist or turn the belt inside out. Do not allow grease or water to come in contact with it!

To install:
  1. Inspect the belt for cracks, missing teeth or overall wear. Replace as necessary.
  2.  
  3. Install the idler pulley, then install the timing belt. Make sure that the belt is aligned at all positions if new, or at all previously marked points, if it is being reused.
  4.  


CAUTION
Be sure that the timing belt is securely meshed with the gear teeth; it should never be loose!

  1. Install the tension spring, then turn the engine two complete revolutions (from TDC to TDC). Always turn the engine clockwise, using the crankshaft pulley bolt. All timing marks should still be in alignment; if not, remove the belt and try again.
  2.  
  3. Further installation is in the reverse order of removal.
  4.  

 
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