Concord L6-258 4.2L VIN C 2-bbl (1982)
Catalytic Converter: Service and Repair
Fig. 18 Vacuum Pump Installation
NOTE: The catalyst in the monolithic type converter is not replaceable. If it is determined that the converter has lost its effectiveness, it must be
replaced.
1. Raise vehicle.
2. Connect hose of vacuum pump J-25077 on tailpipe and tighten clamp, Fig. 18.
3. Connect shop air to fitting on vacuum pump.
NOTE: Shop air must provide a minimum of 80 psi.
4. On early model converters, remove fill plug using a 3/4 inch allen wrench or tool J-25077-3. On later model converters, remove fill plug as
follows:
a. Drive a small chisel between plug and converter housing. Use care to avoid damaging converter housing.
b. Continue to drive chisel into plug to deform it.
c. Repeat steps a and b at several locations around plug until it is deformed sufficiently to be removed with pliers. Do not pry on converter
housing.
Fig. 19 Vibrator Tool Installation
5. Position vibrator (part of tool J-25077) on converter and lock it in place, Fig. 19.
6. Disconnect air hose from vacuum pump and connect it to vibrator. Catalyst pellets will fall into can for about 10 minutes.
7. When converter is empty, disconnect air hose, remove can and discard pellets.
8. Install refill can on vibrator and connect air hose to vacuum pump attached to tailpipe. Pellets will be drawn into converter.
NOTE: If any pellets exit from the tailpipe, the converter housing is defective and must be replaced.
9. When converter is full, remove vibrator from converter.
