CAMPAIGN: CARB. EMISSIONS INSTALL AIR HORN CUP PLUG
GENERAL MOTORS HAS DETERMINED THAT SOME 1980 FULL SIZE CHEVROLET, CAMARO, EL CAMINO, MONTE CARLO AND MALIBU MODELS HAVE BEEN ASSEMBLED WITH CALIFORNIA RPO LG4 5.0 LITRE C-4 ENGINES WHICH HAVE 4-BARREL CARBURETORS THAT HAVE A PASSAGE MACHINED IN THE AIR HORN IN ERROR. THIS PASSAGE WILL ALLOW FUEL VAPORS TO VENT TO THE ATMOSPHERE, RESULTING IN THE CARBURETOR NOT FUNCTIONING IN CONFORMANCE TO THE APPLICABLE EMISSION REQUIREMENT.
TO CORRECT THIS CONDITION, DEALERS ARE TO INSPECT AND, IF REQUIRED, INSTALL A SPECIAL CUP PLUG IN THE OPEN PASSAGE OF THE CARBURETOR AIR HORN ACCORDING TO THE INSTRUCTIONS CONTAINED IN THIS CAMPAIGN BULLETIN.
VEHICLES INVOLVED
CERTAIN 1980 FULL SIZE CHEVROLET, CAMARO, EL CAMINO, MONTE CARLO AND MALIBU MODELS EQUIPPED WITH RPO LG4 5.0 LITRE C-4 ENGINES ASSEMBLED AT THE FOLLOWING ASSEMBLY PLANTS WITHIN THE FOLLOWING VEHICLE PARAMETERS.
1980 MONTE CARLO, MALIBU AND EL CAMINO
PLANT FROM THROUGH
ARLINGTON START OF PRODUCTION 1T19HAR407855 FREMONT START OF PRODUCTION 1W80HAZ401983
1980 FULL SIZE CHEVROLET
SOUTHGATE START OF PRODUCTION 1L35HAC102954
1980 CAMARO
VAN NUYS START OF PRODUCTION 1P87HAL512806
INVOLVED VEHICLES HAVE BEEN IDENTIFIED BY VEHICLE IDENTIFICATION NUMBER COMPUTER LISTINGS. COMPUTER LISTINGS CONTAIN THE COMPLETE VEHICLE IDENTIFICATION NUMBER, OWNER NAME 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 STATE 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 FOR THE FOLLOW-UP NECESSARY TO COMPLETE THIS CAMPAIGN.
ANY DEALER NOT RECEIVING A COMPUTER LISTING WITH THE CAMPAIGN BULLETIN WAS NOT SHIPPED ANY INVOLVED VEHICLES.
OWNER NOTIFICATION
OWNERS WILL BE NOTIFIED OF THIS CAMPAIGN ON THEIR VEHICLES BY CHEVROLET MOTOR DIVISION (SEE COPY OF OWNER LETTER INCLUDED WITH THIS BULLETIN).
DEALER CAMPAIGN RESPONSIBILITY
DEALERS ARE TO SERVICE ALL VEHICLES SUBJECT TO THEI CAMPAIGN, REGARDLESS OF MILEAGE, AGE OF VEHICLE, OR OWNERSHIP FROM THIS TIME FORWARD.
WHENEVER A VEHICLE SUBJECT TO THIS CAMPAIGN IS TAKEN INTO YOUR NEW OR USED 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.
SERVICE PROCEDURE
1. REMOVE KEY FROM IGNITION TO PREVENT ACCIDENTAL STARTING.
2. RAISE HOOD AND COVER FENDERS.
3. REMOVE WING NUT AND LID FROM AIR CLEARNER.
NOTE: IT IS NOT NECESSARY TO REMOVE AIR CLEANER ASSEMBLY FROM CARBURETOR.
4. INSPECT FOR BRASS CUP PLUG IN AIR HORN. REFER TO FIGURE 1. IF PLUG IS NOT PRESENT, INSERT A PIECE OF WIRE TO DETERINE IF PASSAGE IS CAST SHUT (APPROXIMATELY L-L/4" DOWN FROM TOP OF RAISED BOSS ON CASTING). REFER TO FIGURE 2.
5. IF BRASS PLUG HAS BEEN INSTALLED OR PASSAGE IS CAST SHUT (STEP 4), NO FURTHER WORK IS REQUIRED. REPLACE AIR CLEANER LID, INSTALL AND TIGHTEN WING NUT AND INSTALL CAMPAIGN IDENTIFICATION LABEL, AND CLOSE HOOD.
6. IF BRASS CUP PLUS IS NOT PRESENT OR AIR PASSAGE IS NOT CAST SHUT (STEP 4), PERFORM THE FOLLOWING:
A. PLACE PLUG (SUPPLIED) SQUARELY OVER PASSAGE IN AIR HORN WITH LIP OF CUP PLUG FACING UP. REFER TO FIGURE 3.
B. USING A SUITABLE DRIFT (3/8" DIAMETER), DRIVE PLUG INTO CASTING UNTIL PLUG IS TIGHT (LIP OF PLUG FLUSH OR BELOW TOP OF RAISED BOSS ON CASTING.)
C. REPLACE AIR CLEANER LID, INSTALL AND TIGHTEN WING NUT. INSTALL CAMPAIGN IDENTIFICATION LABEL AND CLOSE HOOD.
PARTS INFORMATION
PARTS REQUIRED TO COMPLETE THE MODIFICATION, WHEN REQUIRED, ARE TO BE OBTAINED FROM THE CHEVROLET ZONE SERVICE DEPARTMENT. DEALERS ARE TO OBTAIN ONLY THE REQUIRED NUMBER OF THE SPECIAL CARBURETOR CUP PLUGS REQUIRING REPLACEMENT.
WARRANTY INFORMATION, FAILURE CODE, LABOR TIME ALLOWANCE, FAILED LABOR OPERATION & CONDITION CODE
SUBMIT A PRODUCT RECALL CAMPAIGN WARRANTY CLAIM WITH THE INFORMATION INDICATED BELOW.
FAILURE LABOR TIME FAILED LABOR CODE ALLOWANCE OPERATION
00 .2 HOURS V0350
DESCRIPTION: INSPECT CARBURETOR: VEHICLE DOES NOT REQUIRE SPECIAL BRASS CUP PLUG. NO FURTHER ACTION REQUIRED.
00 .2 HOURS V035L
DESCRIPTION: INSPECT AND INSTALL SPECIAL CARBURETOR BRASS CUP PLUG.
DEALERS WILL AUTOMATICALLY RECEIVE .1 HOURS DEALER ADMINISTRATIVE DETAIL ASSOCIATED WITH THIS CAMPAIGN.
DEALERS WILL AUTOMATICALLY BE CREDITED 30 PERCENT OF DEALER NET ($.02) WHEN PARTS ARE FURNISHED AT NO CHARGE BY CHEVROLET.
CAMPAIGN IDENTIFICATION LABEL
EACH VEHICLE MODIFIED IN ACCORDANCE WITH THE INSTRUCTIONS OUTLINED IN THE PRODUCT 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.
EACH "CAMPAIGN IDENTIFICATION LABEL" IS TO BE LOCATED ON THE RADIATOR CORE SUPPORT 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.
ADMINISTRATIVE PROCEDURE
THE APPROPRIATE CAMPAIGN HANDLING AND ADMINISTRATIVE PROCEDURE MAY BE FOUND IN THE CHEVROLET SERVICE POLICIES AND PROCEDURES MANUAL, SECTION 4, PAGES 1 AND 2, DATED OCTOBER, 1979 IN YOUR DEALERSHIP.
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.
