GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

Glow Plugs

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A burned out Fast Glow glow plug may bulge, then break off and drop into the pre-chamber when the plug is removed. When this occurs, the cylinder head must be removed and the pre-chamber removed from the head to extract the broken tip. When installing a glow plug, apply lubricant 1052771 or equivalent to the threads only if the engine is equipped with aluminum cylinder heads. It is important that the pre-chamber be fully installed flush to the surface of the cylinder head. If this is not done, cylinder head gasket or piston damage can occur. When servicing the right rear glow plugs, it may be necessary to utilize the following procedure.

REMOVAL & INSTALLATION



See Figure 1



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Fig. Fig. 1: Glow plugs need lubrication for installation; apply it to the threads only

  1. Remove the engine support strut.
  2.  
  3. Rotate the intermediate steering shaft so that the steering gear stub shaft clamp bolt is in the up position and remove the clamp bolt. Then disconnect the intermediate shaft from the stub shaft.
  4.  

Whenever the body is going to be moved in relation to the cradle, the intermediate shaft should be disconnected from the rack and pinion steering gear stub shaft.


CAUTION
Failure to disconnect the intermediate shaft from the rack and pinion stub shaft can result in damage to the steering gear and/or intermediate shaft. This damage can cause loss of steering control which could result in a vehicle crash with possible bodily injury.

  1. Place a floor jack under the front crossmember of the cradle and raise the jack until the jack just starts to raise the car.
  2.  
  3. Remove the front two body mount bolts with the lower cushions and retainers. Then remove the cushions from the bolts.
  4.  

The removal of any one body mount requires the loosening of the adjacent body mounts to permit the cradle to separate from the body. Take care to prevent breaking the plastic fan shroud, or damaging frame attachments such as steering hoses and brake pipes, during replacement of body mounts.

  1. Thread the body mount bolts with retainers a minimum of three turns into the cage nuts so that the bolts retain cradle movement.
  2.  
  3. Release the floor jack slowly until the crossmember contacts the body mount bolt retainers. As the jack is being lowered, watch and correct any interference with hoses, lines, pipes and cables.
  4.  


CAUTION
Do not place your hands between the crossmember and body mount to remove objects or correct interference while the jack is lowering. Do not lower the cradle without it being restrained, as possible damage can occur to the body and underhood items.

  1. Remove the glow plug lead, then the plug.
  2.  

To install:
  1. Install the new glow plug.
  2.  
  3. Jack up the front crossmember at the cradle until the jack just starts to raise the car.
  4.  

When installing a body mount, take care to ensure that the body is seated properly in the frame mounting hole; otherwise, direct metal to metal contact will result between the frame and the body. The tube spacer should be in all bolt-in-body mounts. The insulator and metal washer should be positioned to prevent contact with the frame rail. Do not overtighten the body mount; otherwise, a collapsed tube spacer or stripped bolt may result.

  1. Install the numbers 1 and 3 body bolt lower cushions and retainers. Tighten the bolts to 77 ft. lbs. (105 Nm).
  2.  

Proper clamping by the mount depends on clean dry surfaces. If the body mount bolt doesn't screw in smoothly, it may be necessary to run a tap through the cage nut in the body to remove foreign material. Take care to ensure that the tap does not punch through the underbody.

  1. Lower the car.
  2.  
  3. Tighten the intermediate steering shaft clamp bolt to 40 ft. lbs. (54 Nm).
  4.  
  5. Install the engine support strut.
  6.  

 
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