Dual Bed Cat Converters - Revised Repair Procedure: Overview

Number: 82-T-144

Section: VIII

Date: June, 1983
Subject: REPAIR PROCEDURE FOR DUAL BED BEAD CATALYTIC CONVERTERS - ALL 1981-82 VEHICLES EQUIPPED WITH DUAL BED BEAD CATALYTIC CONVERTERS
TO: ALL CHEVROLET DEALERS

This bulletin supercedes bulletin 81-T-76, 81-T-76 Supplement and 82-T-58.

A new repair procedure has been developed for servicing dual bed bead catalytic converters. The procedure consist of transferring the catalyst beads from plugged or externally damaged (not internally damaged or expanded) dual bed converters to an empty new design dual bed bead converter. Also, some new upper bed catalyst beads must be added to the upper bed of the new converter.

Used beads from expanded or internally damaged converters cannot be used in the new empty converter. Either "stored" upper and lower bed beads or upper and lower bed bead kits must be use in conjunction with the rebuild kit.

Subject vehicles that had the original dual bed converter replaced with a single bed converter or 1982 vehicles produced with the single bed converter (built after April 17, 1982) must be serviced with another single bed converter of the same part number.

Vehicles involved in this program are listed below:

Carline Engines

1981 Model Year

Chevrolet ("B") Camaro, Malibu, Monte Carlo, and
El Camino 3.8L (229), 4.4L, 5.0L

Chevrolet ("B") Camaro,

Corvette and Malibu 5.7L

1982 Model Year

Chevrolet ("B"), Malibu,

Monte Carlo and El Camino 3.8L (229), 4.4L, 5.0L

Chevrolet ("B") 5.7L

Camaro 5.0L (LG4)