Roadmaster 1992

Timing Chain & Sprockets

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
    NOTE
    Disconnecting the negative battery cable on some vehicles may interfere with the functions of the on-board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is reconnected.


    NOTE
    If working near and/or around the SRS system and components, be sure to properly disable the SRS system. See disarming/arming the SRS system.

  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the timing gear cover.

    Click image to see an enlarged view

    Fig. Timing chain front cover and related components

  6.  
  7. With the timing gear cover removed, rotate the engine so that the No. 6 cylinder T.D.C. mark on the camshaft sprocket, aligns with the mark on the crankshaft sprocket.
  8.  
  9. Remove the 3 bolts holding the camshaft sprocket to the camshaft. Pull the camshaft sprocket forward.
  10.  
  11. If the camshaft sprocket will not move, give the sprocket a light blow with a plastic mallet, on the lower edge. Remove the sprocket and timing chain.

    Click image to see an enlarged view

    Fig. Timing gear alignment-1991-1993

  12.  

To install:


NOTE
Be sure to use new fasteners, as required.


NOTE
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread sealer are identified. Do not use paints, lubricants or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners.

  1. Position the sprocket into place and secure with the 3 camshaft sprocket bolts without changing the engines position. Torque the bolts to 15-25 ft. lbs. (20-35 Nm).
  2.  
  3. Install the timing gear cover.
  4.  
  5. Using the GM diagnostic scan tool or aftermarket equivalent reprogram the necessary systems and components. Be sure to follow the scan tool manufacturer-s directions.
  6.  

 
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