Pontiac Fiero 1984-1988 Repair Guide

Timing Chain and Sprockets

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REMOVAL & INSTALLATION



6-2.8L Engine


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Fig. Fig. 1 The timing chain and sprockets are only accessible after the timing chain cover has been removed-V6 engines



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Fig. Fig. 2 Make sure the marks on the camshaft and crankshaft are aligned after the chain has been installed

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Remove the timing chain cover as outlined in the Timing Chain Cover removal procedures in this section.
  4.  
  5. Place the No. 1 piston at Top Dead Center, with the marks on the camshaft and crankshaft sprockets aligned.
  6.  

If the timing chain is broken when removing, the timing marks on the camshaft and crankshaft will have to be lined up. Refer to the Camshaft Timing illustration in this section for the proper timing mark location.

  1. Remove the camshaft sprocket and chain.
  2.  

It may be necessary to use a plastic mallet on the lower edge of the sprocket to dislodge it.

  1. Remove the crankshaft sprocket with Tool No. J5825.
  2.  

To install:

  1. Install the crankshaft sprocket with a sprocket installer tool No. J5590.
  2.  
  3. Apply Molykote® or equivalent to the sprocket thrust surface of the camshaft.
  4.  
  5. Hold the sprocket with the chain hanging down and align the marks on the camshaft and crankshaft sprockets.
  6.  
  7. Align the dowel in the camshaft with the dowel hole in the camshaft sprocket.
  8.  
  9. Draw the camshaft sprocket onto the camshaft, using the mounting bolts and torque to 15-20 ft. lbs. (20-27 Nm).
  10.  
  11. Lubricate the timing chain with engine oil.
  12.  
  13. Install the timing chain cover, water pump and torsional damper.
  14.  
  15. Refill the engine with coolant and start to check for oil and coolant leaks.
  16.  

 
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