CAMPAIGN: 5.0L V8 GAS ENGINE EMISSIONS - INSTALL KIT

MODELS/YEARS 1980 DELTA 88, CUSTOM CRUISER, NINETY-EIGHT & TORONADO WITH 5.0L V-8 ENGINE (VIN CODE Y) AND FEDERAL EMISSIONS

CONDITION

The Administrator of the U.S. Environmental Protection Agency (EPA) has determined that some 1980 5.0L V-8 vehicles may be emitting pollutants in excess of the Federal emission standards. These standards were established to protect the public health or welfare from the dangers of air pollution.

VEHICLES INVOLVED

All 1980 Delta 88, Custom Cruiser, Ninety-Eight and Toronado models equipped with a 5.OL V-8 engine (VIN Code Y) and Federal Emissions.

DEALER ACTION

Dealers are to remove the vacuum modulator valve (VMV) and modify engine vacuum port connections , set ignition timing and adjust engine idle speed as directed in the Service Procedure section of this bulletin.

Whenever a vehicle subject to this campaign is taken into your vehicle inventory, or it is in your dealership for service in the future, you should take the steps necessary to be sure the campaign correction has been made before reselling or releasing the vehicle.

Owners of vehicles recently sold from your used vehicle inventory are to be contacted by the dealer, and arrangements made to make the required modification according to instructions contained in this bulletin.

SERVICE PROCEDURE

1. Install seat and fender covers and open the hood.

2. Remove the air cleaner assembly.

3. Locate the vacuum modulator valve (VMV). Refer to Figure 1.

4. Remove the vacuum modulator valve (VMV) from its rubber connector and discard the valve.

5. Install rubber plug supplied with vacuum tube kit, part number 22534146, in the "MAN" opening of the VMV rubber connector. Plug installation may be eased by lubricating plug with soap prior to installation. Refer to Figure 2.

6. Install one end of the "U" shaped vacuum tube supplied with the kit, into the "CARB" opening of the VMV rubber connector and the other end into the "DIST" opening of the VMV rubber connector. Refer to Figure 2.

7. Position the VMV rubber connector with the plug and "U" shaped vacuum tube installed to its original location.

8. Remove and discard existing emission control information label from top of fan shroud and install new label supplied with kit.

9. Set engine ignition timing to 18 DEG BTDC as outlined on new emission control information label.

10. Set engine idle speed as outlined on new emission control information label.

11. Reinstall air cleaner assembly.

12. Install Campaign Identification label. Each vehicle modified in accordance with the instructions outlined in this Emission Campaign Bulletin will require a Campaign Identification label. Each label provides a space to include the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or ballpoint pen. When installing label, clean the surface of the radiator upper mounting support and apply the campaign label where it is readily visible.

13. Close hood.

PART INFORMATION

Parts are to be obtained from WDDGM using the following part number:

Description Part No. ----------- -------- Vacuum Tube Kit 22534146

To ensure that these parts will be obtained as soon as possible, they should be ordered from WDDGM on a C.I.O. order with no special instruction code, but order on an advise code (2).

It is recommended that some quantity of vacuum tube kits be ordered upon receipt of this bulletin to allow for part availability upon owner request for vehicle modification.

WARRANTY CLAIM INFORMATION

Failure Labor Labor Operation Code Operation Hours --------- ---- --------- ----- Remove VMV, Modify Engine 96 V3210 .5 Vacuum Port Connections, Set Timing & Adjust Engine Idle Speed

Parts will be credited at dealer cost plus 30%.

.1 hour for clerical administration may be added to the above operation.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.