GM Cutlass RWD 1970-1987 Repair Guide

Catalytic Converter



See Figure 1

The catalytic converter maintains a high temperature for an extended time after the engine is turned off. Allow the vehicle to cool for at least two hours before servicing the exhaust system or personal injury may occur.

Place safety glasses over your eyes. Remove bolts at the flange at the rear end. Then, loosen nuts and remove U-clamp to remove the catalyst. Slide the catalyst out of the outlet pipe. Replace all ring seals. In some cases, you'll have to disconnect an air line coming from the engine compartment before catalyst removal. In some cases, a hanger supports the converter via one of the flange bolts. Make sure the hanger gets properly reconnected. Also, be careful to retain all parts used to heat shield the converter and reinstall them.

Make sure the converter is replaced for proper direction of flow and air supply connections.

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Fig. Fig. 1: Catalytic convertor mounting hardware