CAMPAIGN: STAGED PURGE VALVE

SUBJECT: STAGED PURGE VALVE

MODELS AFFECTED: 1981 A, B, AND F BODIES WITH 4.3L (VIN CODE S) V8 ENGINES.

THE ADMINISTRATOR FO THE EPA HAS DETERMINED THAT CERTAIN 1981 VEHICLES EQUIPPED WITH 4.3L (VIN CODE S) V8 ENGINES MAY BE EMITTING POLLUTANTS IN EXCESS OF FEDERAL EVAPORATIVE EMISSION STANDARDS. THESE STANDARDS WERE ESTABLISHED TO PROTECT THE PUBLIC HEALTH OR WELFARE FROM THE DANGERS OF AIR PULLUTION. THIS CONDITION COULD CAUSE A VEHICLE TO FAIL AN EMISSION INSPECTION TEST, IF REQUIRED UNDER STATE OR LOCAL LAW.

VEHICLES INVOLVED:

INVOLVED ARE CERTAIN 1981 CENTURY AND REGAL MODEL VEHICLES EQUIPPED WITH 4.3L V-8 ENGINES, AND PRODUCED WITHIN THE FOLLOWING VIN BREAKPOINTS:

PLANT FROM THROUGH AND INCLUDING

FLINT BH100002 BH266436 FRAMINGHAM BG100002 BG186839 FREEMONT BZ100165 BZ147522 LEEDS BK100026 BK172758

INVOLVED ARE CERTAIN 1981 LEMANS, GRAND LEMANS, GRANK PRIX, CATALINA, BONNEVILLE, AND FIREBIRD MODEL VEHICLES EQUIPPED WITH 4.3L V8 ENGINES AND PRODUCED WITHIN THE FOLLOWING VIN BREADPOINTS:

YEAR MODEL FROM THROUGH

1981 LEMANS SOP EOP GRAND LEMANS SOP EOP GRAND PRIX SOP EOP CATALINA SOP EOP BONNEVILLE SOP EOP FIREBIRD SOP EOP

DEALER ACTION:

A STAGED PURGE CONTROL VALVE WILL BE INSTALLED BETWEEN THE CHARCOAL CANISTER AND THE CARBURETOR ACCORDING TO THE INSTRUCTIONS CONTAINED IN THIS BULLETIN.

DEALERS ARE TO SERVICE ALL VEHICLES SUBJECT TO THIS CAMPAIGN AT NO CHANGE TO OWNERS, REGARDLESS OF MILEAGE, AGE OF VEHICLE, OR OWNERSHIP FROM THIS TIME FORWARD.

WHENEVER A VEHICLE SUBJECT TO HIS CAMPAIGN IS TAKEN INTO YOUR USED CAR INVENTORY, OR IT IS IN YOUR DEALERSHIP FOR SERVICE, YOU ARE TO ENSURE THE CAMPAIGN CORRECTION HAS BEEN MADE BEFORE SELLING OR RELEASING THE VEHICLE.

DEALERS ARE TO CONTACT OWNERS OF VEHICLES RECENTLY SOLD FROM YOUR USED VEHICLE INVENTORY AND ARRANGE FOR THE CAMPAIGN CORRECTION TO BE PERFORMED.

DEALER MATERIAL:

IF YOUR DEALERSHIP HAS VEHICLES INVOLVED IN THIS CAMPAIGN, YOU WILL RECEIVE THE FOLLOWING ITEMS:

LISTING OF ALL VEHICLES INVOLVED IN THIS CAMPAIGN IN THE AREA OF YOUR DEALERSHIP.

ONE CAMPAIGN IDENTIFICATION LABEL FOR EACH VEHICLE.

INVOLVED VEHICLES HAVE BEEN IDENTIFIED BY VEHICLE IDENTIFICATION NUMBER COMPUTER LISTINGS. COMPUTER LISTINGS CONTAIN THE COMPLETE VIN, OWNER NAVE AND ADDRESS DATA, AND ARE FURNISHED TO THE INVOLVED DEALERS WITH THE CAMPAIGN BULLETIN. OWNER NAME AND ADDRESS DATA FURNISHED WILL ENABLE DEALERS TO FOLLOW UP WITH OWNERS INVOLVED IN THIS CAMPAIGN.

THESE LISTINGS MAY CONTAIN OWNER NAMES AND ADDRESSES OBTAINED FROM MOTOR VEHICLE REGISTRATION RECORDS. THE USE OF SUCH MOTOR VEHICLE REGISTRATION DATA FOR ANY OTHER PURPOSE IS A VIOLATION OF LAW IN SEVERAL STATES. ACCORDINGLY, YOU ARE URGED TO LIMIT THE USE OF THIS LISTING TO THE FOLLOW UP NECESSARY TO COMPLETE THIS CAMPAIGN.

OWNER NOTIFICATON:

OWNERS WILL BE NOTIFIED OF THIS CAMPAIGN BY GENERAL MOTORS (SEE COPY OF OWNER LETTER INCLUDED WITH THIS BULLETIN).

CHANGE OF OWNER INFORMATION:

DEALERS ARE TO USE THE DEALER COMMUNICATION SYSTEM(DCS) TO PROVIDE GENERAL MOTORS WITH SUBSEQUENT OWNER INFORMATION. BY REPORTING A CHANGE OF OWNER NAME OR ADDRESS OF A VEHICLE IN CAMPAIGN STATUS OVER THE DCS, THE NEED TO SEND A CVAR FORM FOR THAT VEHICLE IS ELIMINATED. TERMINAL INPUT INSTRUCTIONS ARE COVERED IN THE DCS MANUAL.

PARTS INFORMATION:

PARTS REQUIRED TO COMPLETE THIS CAMPAIGN ARE TO BE OBTAINED FROM GENERAL MOTORS SERVICE PARTS OPERATION (GMSPO). TO ENSURE THAT PARTS ARE OBTAINED AS SOON AS POSSIBLE, THEY SHOULD BE ORDERED ON A C.I.O. ORDER WITH NO SPECIAL INSTRUCTION CODE, BUT ON AN ADVISE CODE (2).

PART NUMBER DESCRIPTION QUANTITY/VEHICLE

17089078 STAGED PURGE VALVE KIT 1

NOTICE: KIT P/N 17089078 CONSISTS OF THE FOLLOWING:

(1) TANK PRESSURE CONTROL VALVE (1) 1 1/2" LENGTH 1/4" I.D. HOSE (CONNECTED TO "TANK" PORT) (1) 1 1/4" LENGTH 1/4" I.D. HOSE (CONNECTED TO "CAN" PORT) (1) 1/4" TO 7/32" REDUCER (CONNECTED TO 1/4" "CAN" HOSE) (1) 6 1/4" LENGTH 7/32" I.D. HOSE (CONNECTED TO REDUCER) (1) 1 1/8" LENGTH 5/32" HOSE (CONNECTED TO VACUUM SIGNAL PORT) (1) 5/32" TO 7/32" REDUCER (CONNECTED TO 5/32" SIGNAL HOSE)

TO ENSURE PARTS AVAILABILITY UPON INITIAL OWNER REQUEST FOR VEHICLE CORRECTION, DEALERS ARE ENCOURAGED TO ORDER PARTS BASED ON INVOLVED VEHICLE LISTINGS, UPON RECEIPT OF THIS BULLETIN.

SERVICE PROCECDURE:

1. DISCONNECT CANISTER PURGE HOSE FROM INBOARD PORT (LABELED "CARB") ON CANISTER PURGE SOLENOID WHICH IS MOUNTED ABOVE VALVE COVER ON RIGHT SIDE OF ENGINE(SEE ILLUSTRATION).

2. CONNECT 1/4" VACUUM HOSE SUPPLIED ON PURGE VALVE KIT (PORT LABELED "TANK") TO THE NOW EMPTY PORT ON CANISTER PURGE SOLENOID.

3. LOCATE MANIFOLD VACUUM TREE WHICH EXTENDS FROM JUST BELOW RIGHT HAND SIDE OF CARBURETOR OUTBOARD TOWARDS RIGHT SIDE VALVE COVER.

4. REMOVE EXISTING CAP FROM OUTBOARD PROT OF MANIFOLD VACUUM TREE AND CONNECT 7/32" VACUUM HOSE SUPPLIED ON PURGE VALVE KIT (PORT LABELED "CAN") TO THE NOW EMPTY PORT ON MANIFOLD VACUUM TREE.

5. POSITION PURGE VALVE KIT SO THAT "RP" LOGO FACES UP.

6. SHORTEN ORIGINAL CANISTER PURGE HOSE (CURRENTLY STILL CONNECTED TO CARBURETOR) AS NECESSARY (APPROCIMATELY 2") AND CONNECT IT TO THE VACUUM SIGNAL PROT ON PURGE CONTROL VALVE (ONLY REMAINING OPEN PORT).

7. INSTALL CAMPAIGN IDENTIFICATION LABEL.

CAMPAIGN IDENTIFICATION LABEL:

EACH VEHICLE MODIFIED IN ACCORDANCE WITH THE INSTRUCTIONS OUT- LINED IN THIS PRODUCT CAMPAIGN BULLETIN WILL REQUIRE A "CAMPAIGN IDENTIFICATION LABEL." EACH LABEL PROVIDES A SPACE TO INCLUDE THE 5 DIGIT DEALER CODE OF THE DEALER PERFORMING THE CAMPAIGN SERVICE. THIS MAY BE INSERTED WITH A TYPEWRITER OR BALLPOINT PEN.

EACH "CAMPAIGN IDENTIFICATION LABEL" IS TO BE LOCATED ON THE FAN SHROUD TOP SURGACE IN AN AREA WHICH WILL BE VISIBLE WHEN THE VEHICLE IS BROUGHT IN FOR PERIODIC SERVICING BY THE OWNER.

APPLY "CAMPAIGN IDENTIFICATION LABEL" ONLY ON A CLEAN DRY SURFACE.

DISPOSITION OF REPLACED PART:

REPLACED PARTS MUST BE HELD FOR DISPOSITON BY BUICK ZONE/BRANCH CONTACT PERSONNEL. EACH REPLACED PART MUST HAVE A CLAIM TAG ATTACHED SHOWING THE REPAIR ORDER AND THE VIN OF THE VEHICLE FROM WHICH IT WAS REMOVED.

WARRANTY INFORMATION:

PART FAILED PARTS FAILURE LABOR LABOR OTHER SUBLET DLR COUNT PART NO ALLOW CODE OP NO HOURS HOURS MTL AND TWG

1 17089078 ** 96 V4590 0.3 *0.1 ----

INSTALL STAGED PURGE VALVE KIT

* 0.1 HOUR FOR ADMINISTRATION. ** LIST CURRENT GMSPO DEALER NET PRICE OF INSTALLED PART, PLUS 30%.

COPYRIGHT 1988 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.

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.