Catalyst Replacement (AMERICAN Motors And General Motors Only)
- Raise vehicle and attach vacuum aspirator device (J-25077 or equivalent) to exhaust pipe as shown in Fig 1.
- Apply enough air pressure (minimum 80 psi) to hold catalyst beads in place. Drive small chisel between fill plug and converter housing, making sure not to damage housing. Continue driving small chisel into plug until plug is deformed enough to remove using pliers.NOTE: Do not pry plug from converter housing or damage to housing may result.
- Clamp on vibrator and catalyst receptacle as shown in Fig 2. Disconnect air supply from vacuum aspirator and attach it to vibrator unit.
- Allow vibrator to operate about 10 minutes to remove all catalyst beads.
- When all catalyst material is removed, disconnect air supply and remove container from converter and discard beads.
- Fill container with approved replacement catalyst and install a fill tube fixture to the vibrator device.
- Attach air supply to both vibrator and aspirator. With container attached to fill tube, catalyst will begin to move into converter.
- When catalyst stops flowing, disconnect air supply to vibrator and note level of catalyst. It should be even with fill plug. Add more catalyst if required.NOTE: If any pellets exit out tailpipe during refilling, converter is defective and must be replaced.
- Apply suitable anti-seize compound to fill plug. Install plug and tighten. If equipped with press-type fill plug, install "bridge-and-bolt" type service plug and tighten to 28 ft. lbs.