REMOVAL & INSTALLATION
See Figure 1
When the lines are disconnected use a back-up wrench on the upper injection nozzle hex. It may also be necessary to jack up the engine to gain access to the back bank of injectors. Always cap the nozzle and lines to prevent damage of contamination.
- Remove the fuel injection lines.
- Remove the injector nozzles by applying torque to the largest nozzle hex.
When working on the right rear bank of the engine it may be necessary to do the following:
- Rotate the intermediate steering shaft so that the steering gear stub shaft clamp bolt is in the up position, then remove the clamp bolt.
- Disconnect the intermediate shaft from the stub shaft.
- Remove the engine support strut, then place a floor jack under the front crossmember of the cradle, then raise the vehicle just enough to lift the car off the ground.
- Remove the two front body mounts #1 and 3 bolts with the lower cushions and retainers. Remove the cushions from the bolts.
- Thread the body mount bolts with the retainers a minimum of 3 turns into the cage nuts so that the bolts restrain the cradle movement.
- Release the floor jack slowly until the crossmember contacts the body mount bolt retainers. When the jack is being lowered watch and fix any interference with hoses, lines, pipes and cables.
- Reverse the above steps after completing the nozzle replacement. Tighten the intermediate steering clamp bolt to 40 ft. lbs. (54 Nm) and the body mount bolts to 77 ft. lbs. (105 Nm).
When replacing the injectors, be sure to use new copper gaskets.To install:
- When reinstalling the injectors special lubricant (GM part 9985462 or its equal) must be applied to the nozzle threads.
- Remove the protective caps from the nozzle, then make sure the copper gasket is installed on the nozzle.
- Install the nozzle and tighten to 25 ft. lbs. (34 Nm). The nozzle must be tightened at the largest nut hex.
- Attach the lines using a backup wrench on the upper injection nozzle hex. Tighten the line nut to 25 ft. lbs. (34 Nm).