GM Cavalier/Sunbird/Skyhawk/Firenza 1982-1994

Timing Chain and Sprockets

Print

REMOVAL & INSTALLATION



1.8L and 2.0L and 2.2L OHV Engines

See Figures 1 and 2

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the front cover as previously detailed.
  4.  
  5. Place the No. 1 piston at TDC of the compression stroke so that the marks on the camshaft and crankshaft sprockets are in alignment (see illustration).
  6.  



Click image to see an enlarged view

Fig. Fig. 1: Align the crankshaft sprocket and camshaft sprocket timing marks with the alignment tabs on the timing chain tensioner

  1. Loosen the timing chain tensioner nut as far as possible without actually removing it.
  2.  
  3. Remove the camshaft sprocket bolts and remove the sprocket and chain together. If the sprocket does not slide from the camshaft easily, a light blow with a soft mallet at the lower edge of the sprocket will dislodge it.
  4.  
  5. Use a gear puller (J-2288-8-20) and remove the crankshaft sprocket.
  6.  



Click image to see an enlarged view

Fig. Fig. 2: Removing the timing chain and sprockets from a 1994 2.2L OHV engine

To install:
  1. Press the crankshaft sprocket back onto the crankshaft.
  2.  
  3. Install the timing chain over the camshaft sprocket and then around the crankshaft sprocket. Make sure that the marks on the two sprockets are in alignment (see illustration). Lubricate the thrust surface with Molykote® or its equivalent.
  4.  
  5. Align the dowel in the camshaft with the dowel hole in the sprocket and then install the sprocket onto the camshaft. Use the mounting bolts to draw the sprocket onto the camshaft and then tighten to 66-68 ft. lbs.
  6.  
  7. Lubricate the timing chain with clean engine oil. Tighten the chain tensioner.
  8.  
  9. Installation of the remaining components is in the reverse order of removal.
  10.  

2.8L and 3.1L Engines

See Figures 3 and 4

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the front cover, as outlined earlier.
  4.  
  5. Place the No. 1 piston at TDC and the stamped timing marks on both sprockets are closest to one another and in line between the shaft centers (No. 4 firing position).
  6.  



Click image to see an enlarged view

Fig. Fig. 3: View of the alignment marks with the #1 and #4 cylinders at Top Dead Center (TDC)

  1. Take out the three bolts that hold the camshaft sprocket to the camshaft. This sprocket is a light press fit on the camshaft and will come off readily. If the sprocket does not come off easily, a light blow on the lower edge of the sprocket with a plastic mallet should dislodge the sprocket. The chain comes off with the camshaft sprocket. A gear puller will be required to remove the crankshaft sprocket.
  2.  



Click image to see an enlarged view

Fig. Fig. 4: Exploded view of the timing chain and related components - 2.8L and 3.1L engines

To install:
  1. Without disturbing the position of the engine, mount the new crank sprocket on the shaft, then mount the chain over the camshaft sprocket. Arrange the camshaft sprocket in such a way that the timing marks will line up between the shaft centers and the camshaft locating dowel will enter the dowel hole in the cam sprocket.
  2.  
  3. Place the cam sprocket, with its chain mounted over it, in position on the front of the camshaft and pull up with the three bolts that hold it to the camshaft. Torque the bolts to 18 ft. lbs. (25 Nm).
  4.  
  5. Lubricate the timing chain with oil.
  6.  
  7. After the sprockets are in place, turn the engine two full revolutions to make certain that the timing marks are in correct alignment between the shaft centers.
  8.  

 
label.common.footer.alt.autozoneLogo