Toyota Celica/Supra 1971-1985 Repair Guide

Breaker Points and Condenser

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INSPECTION AND CLEANING



See Figure 1



Click image to see an enlarged view

Fig. Fig. 1: The rotor should return to its original position when rotated slightly and then let go

The breaker points should be inspected and cleaned at 6000 mile (9600 km) intervals. To do so, perform the following steps:

  1. Disconnect the high tension lead from the coil.
  2.  
  3. Unsnap the two distributor cap retaining clips and lift the cap straight up. Leave the leads connected to the cap and position it out of the way.
  4.  
  5. Remove the rotor and dust cover by pulling them straight up.
  6.  
  7. Place a screwdriver against the breaker points and pry them open. Examine their condition. If they are excessively worn, burned, or pitted, they should be replaced.
  8.  
  9. Polish the points with a point file. Do not use emery cloth or sandpaper; these may leave particles on the points causing them to arc.
  10.  
  11. Clean the distributor cap and rotor with alcohol. Inspect the cap terminals for looseness and corrosion. Check the rotor tip for excessive burning. Inspect both cap and rotor for cracks. Replace either if they show any of the above signs of wear or damage.
  12.  
  13. Check the operation of the centrifugal advance mechanism by turning the rotor clockwise. Release the rotor; it should return to its original position. If it doesn't, check for binding parts.
  14.  
  15. Check the vacuum advance unit, by removing the plastic cap and pressing on the octane selector. It should return to its original position. Check for binding if it doesn't.
  16.  
  17. If the points do not require replacement, perform the adjustment procedure. Otherwise perform the point and condenser replacement procedures.
  18.  

REMOVAL & INSTALLATION



Points

The points should be replaced every 12,000 miles (19,300 km), or if they are badly pitted, worn, or burned. To replace them, proceed as follows:

  1. Disconnect the high tension lead from the coil.
  2.  
  3. Unsnap the two distributor cap retaining clips and lift the cap straight up. Leave the leads connected to the cap and position it out of the way.
  4.  
  5. Remove the rotor and dust cover by pulling them straight up.
  6.  
  7. Unfasten the point lead connector.
  8.  
  9. Remove the point retaining clip and unfasten the point hold-down screw(s). It is a good idea to use a magnetic or locking screwdriver to remove the small screws inside the distributor, since they are almost impossible to find once they have been dropped.
  10.  
  11. Lift out the point set.
  12.  
  13. Install the new point set in the reverse order of removal. Adjust the points as detailed below, after completing installation.
  14.  

Condenser

Replace the condenser whenever the points are replaced, or if it is suspected of being defective. On Toyota passenger cars the condenser is located on the outside of the distributor. To replace it, proceed as follows:

  1. Carefully remove the nut and washer from the condenser lead terminal.
  2.  
  3. Use a magnetic or locking screwdriver to remove the condenser mounting screw.
  4.  
  5. Remove the condenser.
  6.  
  7. Installation of a new condenser is performed in the reverse order of removal.
  8.  

ADJUSTMENT



See Figures 2, 3 and 4

  1. Rotate the engine by hand (with a wrench on the crankshaft pulley nut) or by using a remote starter switch, so that the rubbing block is on the high point of the cam lobe.
  2.  
  3. Insert a 0.018 inch (0.46mm) feeler gauge between the points; a slight drag should be felt.
  4.  
  5. If no drag is felt or if the feeler gauge cannot be inserted at all, loosen, but do not remove, the point hold-down screw.
  6.  
  7. Insert a screwdriver into the adjustment slot. Rotate the screwdriver until the proper point gap is attained.
  8.  
  9. Tighten the point hold-down screw. Lubricate the cam lobes, breaker arm, rubbing block, arm pivot, and distributor shaft with special high temperature distributor grease.
  10.  



Click image to see an enlarged view

Fig. Fig. 2: The feeler gauge method of checking the point gap is less accurate than the dwell meter method



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Fig. Fig. 3: On 1971-74 models, check the point gap as indicated



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Fig. Fig. 4: Lubricate the areas indicated with grease

 
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