Toyota Celica, Corolla, ECHO & MR2 1999-05

Camshaft, Bearings & Lifters 2

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Removal & Installation



7A-FE Engine
  1. Disconnect the negative battery cable. On vehicles equipped with an air bag, wait at least 90 seconds before proceeding.
  2.  
  3. Disconnect the spark plug wires from the spark plugs. Be sure to make note of the proper firing order for easier installation.
  4.  
  5. Remove the valve cover.
  6.  
  7. Remove the timing belt covers.
  8.  
  9. Remove the timing belt and idler pulley.
  10.  
  11. Set the exhaust camshaft so that the knock pin is slightly above the cylinder head. This angle allows the No. 1 and No. 3 cylinder cam lobes of the intake camshaft to push their valve lifters evenly.
  12.  
  13. Remove the two bolts and the front bearing cap of the intake camshaft.
  14.  



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Fig. Always remove the No. 1 bearing cap first on the intake side

  1. Secure the intake camshaft end gear to the sub-gear with a service bolt. The service bolt should match the following specifications:

    Thread diameter: 6.0mm
     
    Thread pitch: 1.0mm
     
    Bolt length: 16mm
     

  2.  



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Fig. Secure the intake camshaft with a service bolt at the end of the sub-gear

  1. Uniformly loosen each intake camshaft bearing cap bolt in several passes in the reverse order of the installation sequence.
  2.  


WARNING
The camshaft must be held level while it is being removed. If the camshaft is NOT kept level, the portion of the cylinder head receiving the thrust may crack or become damaged. In turn, this could cause the camshaft to bind or break. Before removing the intake camshaft, make sure the rotational force has been removed from the sub-gear; that is, the gear should be in a neutral or "unloaded" state.



Click image to see an enlarged view

Fig. Lift the camshaft out straight and level

  1. Remove the four bearing caps and remove the intake camshaft.
  2.  

If the camshaft cannot be removed straight and level, install and tighten the No. 3 bearing cap. Alternately loosen the bolts on the bearing cap a little at a time while pulling upwards on the camshaft gear. Do NOT attempt to pry or force the cam loose with tools.

  1. With the intake camshaft removed, turn the exhaust camshaft approximately 105°, so that the guide pin in the end is just past the 5 o'clock position. This angle allows the No. 1 and the No. 3 cylinder cam lobes of the exhaust camshaft to push their valve lifters evenly.
  2.  



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Fig. Set the knock pin on the exhaust camshaft slightly counterclockwise from the vertical axis of the cam

  1. Loosen the camshaft bearing cap bolts a little at a time and in the reverse order of the installation sequence.
  2.  
  3. Remove the two bolts, No. 1 bearing cap and oil seal.
  4.  



Click image to see an enlarged view

Fig. Remove the No. 1 bearing cap off the exhaust side with the oil seal, if hard to remove, do not force it

If the No. 1 bearing cap is not removable by hand, do not try to remove it by force but leave it as it is without bolts.

  1. Remove the bearing caps and remove the exhaust camshaft. After removal, label each cap.
  2.  

If the camshaft cannot be removed straight and level, install and tighten the No. 3 bearing cap. Alternately loosen the bolts on the bearing cap a little at a time while pulling upwards on the camshaft gear. Do NOT attempt to pry or force the cam loose with tools.



Click image to see an enlarged view

Fig. Remember, remove the camshaft straight and level

  1. Remove the valve lifter shims and hydraulic lifters. Identify each lifter and shim as it is removed so it can be reinstalled in the same position. If the lifters are to be reused, store them upside down in a sealed container.
  2.  

To install:

  1. Install the valve lifters into their original positions and install the shims. Check valve clearance and replace the shims as necessary.
  2.  
  3. When reinstalling, remember that the camshafts must be handled carefully and kept straight and level to avoid damage.
  4.  
  5. Apply multi-purpose grease to the portion of the camshaft.
  6.  
  7. Place the exhaust camshaft on the cylinder head so that the cam lobes press evenly on the lifters for cylinders Nos. 1 and 3. This will place the guide pin on the camshaft slightly counter clockwise from the vertical axis (about 5 o'clock).
  8.  



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Fig. Install the 4 bearing caps on the intake side in their proper locations-7A-FE engine

  1. Apply a light coat of clean engine oil to the camshaft bearing cap bolts. Install the five bearing caps in position according to the number cast into the cap. The arrow should point towards the pulley end (front) of the motor.
  2.  
  3. Tighten the bearing cap bolts uniformly and in several passes in the proper sequence to 9 ft. lbs. (13 Nm).
  4.  



Click image to see an enlarged view

Fig. Install camshaft bearing tightening sequence-7A-FE engine

  1. Apply multi-purpose grease to a new exhaust camshaft oil seal.
  2.  
  3. Install the exhaust camshaft oil seal using a seal driver. Be very careful not to install the seal on a slant or allow it to tilt during installation.
  4.  
  5. Set the exhaust camshaft so that the guide pin is slightly above the cylinder head.
  6.  
  7. Apply multi-purpose grease to the portion of the intake camshaft.
  8.  
  9. Hold the intake camshaft next to the exhaust camshaft and engage the gears by matching the alignment marks on each gear.
  10.  

Do NOT use the TDC timing marks for the timing belt.

  1. Keeping the gears engaged, roll the intake camshaft down and into its bearing journals. This angle allows the No. 1 and the No. 3 cylinder cam lobes of the intake camshaft to push their valve lifters evenly.
  2.  
  3. Apply a light coat of clean engine oil to the camshaft bearing cap bolts and install the four bearing caps. Observe the numbers on each cap and make certain the arrows point to the pulley end (front) of the motor.
  4.  



Click image to see an enlarged view

Fig. Position the exhaust 5 bearing caps in there correct locations-7A-FE engine

  1. Uniformly tighten each of the eight bearing cap bolts in several passes in the proper sequence. Tighten each bolt to 9 ft. lbs. (13 Nm).
  2.  



Click image to see an enlarged view

Fig. Exhaust camshaft bearing tightening sequence-7A-FE engine

  1. Remove any retaining pins or bolts in the intake camshaft gears.
  2.  
  3. Apply a light coat of clean engine oil to the camshaft bearing cap bolts and install the No. 1 bearing cap for the intake camshaft. Tighten the bearing cap bolts to 9 ft. lbs. (13 Nm).
  4.  

If the No. 1 bearing cap does not fit properly, push the camshaft gear backwards by prying apart the cylinder head and camshaft gear with a suitable tool.

  1. Turn the exhaust camshaft clockwise, and set it with the guide pin facing upward. Check that the timing marks of the camshaft gears are aligned. The camshaft assembly installation marks should now be in the 12 o'clock position.
  2.  
  3. Secure the exhaust camshaft and install the timing belt pulley. Tighten the bolt to 43 ft. lbs. (59 Nm).
  4.  
  5. Check and adjust valve clearance.
  6.  
  7. Make sure that both the crankshaft and camshaft positions are set correctly, insuring that they are both set to TDC/compression for No. 1 cylinder.
  8.  
  9. Install the timing belt.
  10.  
  11. Install the timing belt covers and the valve cover.
  12.  
  13. Install the spark plug wires and connect the negative battery cable.
  14.  
  15. Start the engine, check for leaks, and check the ignition timing.
  16.  
  17. Road test the vehicle for proper operation.
  18.  

 
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