CAMPAIGN:LOW TORQUE ON LIFTER RETAINER BOLTS. Chevrolet Corsica 1995

CAMPAIGN NUMBER: 95-C-06

GROUP: 6-ENGINE

DATE: SEPTEMBER, 1994

RETAIN THIS DCS MESSAGE WITH YOUR DEALER CAMPAIGN BULLETINS SINCE A PAPER DEALER PRODUCT CAMPAIGN BULLETIN WILL NOT BE ISSUED. ********************************************************************** A SPECIALLY DESIGNED TOOL TO PERFORM THIS REPAIR WILL BE SHIPPED TO INVOLVED DEALERS FROM THE ENGINE MANUFACTURING PLANT.

IT WILL BE SENT TO THE ATTENTION OF THE SERVICE MANAGER VIA FEDERAL EXPRESS ON MONDAY, SEPTEMBER 26, 1994.

THE CONTAINER WILL BE MARKED, "CAMPAIGN MATERIAL". THE CONTAINER WILL HAVE A COPY OF THE SERVICE PROCEDURE ALONG WITH ILLUSTRATIONS TO ASSIST YOU IN THE USE OF THE TOOL. *********************************************************************

SUBJECT: LOW TORQUE ON LIFTER RETAINER BOLTS

MODELS: CERTAIN 1995 S PICKUPS EQUIPPED WITH 2.2L (LN2) ENGINES CERTAIN 1995 L CAR EQUIPTED WITH A 2.2L (LN2) ENGINE

NOTE: CHEVROLET VIN DATA NOT AVAILABLE AT THIS TIME.

GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1995 VEHICLES MAY HAVE BEEN ASSEMBLED WITH THE LIFTER RETAINER BOLTS HAVING LOW/ZERO TORQUE APPLIED TO THEM. THE BOLTS MAY CONTINUE TO LOOSEN AND BECOME LODGED OR MAKE CONTACT WITH OTHER ENGINE PARTS AND/OR ALLOW THE LIFTERS TO ROTATE IN THEIR BORES CAUSING DAMAGE TO THE FACE OF THE CAM AND/OR LIFTER(S).

TO CORRECT THIS CONDITION, DEALERS ARE TO TIGHTEN BOTH OF THE LIFTER RETAINER BOLTS TO 11 NM (97 LBS. IN.). IF BOLT(S) LOOSENED ENOUGH TO CAUSE ENGINE DAMAGE, DEALERS ARE TO REPLACE THE ENGINE.

VEHICLES INVOLVED

GMC VEHICLES:

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INVOLVED ARE CERTAIN 1995 S PICKUPS BUILT WITH THE FOLLOWING VINS:

VIN DEALER CODE 1GTCS144XS8503677 48-50105 1GTCS194XSK507112 48-10039 1GTCS1440SK507109 48-21139 1GTCS1444SK507159 48-10087 1GTCS1449SK507187 48-21731

THE SPECIFIC VEHICLES INVOLVED IN THIS CAMPAIGN HAVE BEEN IDENTIFIED BY VEHICLE IDENTIFICATION NUMBER (VIN) COMPUTER LISTINGS. THESE LISTINGS ARE FURNISHED TO ALL INVOLVED DEALERS WITH THE CAMPAIGN BULLETIN. DEALERS SHOULD CONFIRM VEHICLE ELIGIBILITY THROUGH VISS (VEHICLE INFORMATION SERVICE SYSTEM) OR SERVICENET PRIOR TO BEGINNING CAMPAIGN REPAIRS.

DEALER CAMPAIGN RESPONSIBILITY

ALL UNSOLD VEHICLES IN DEALERS' POSSESSION AND SUBJECT TO THIS CAMPAIGN MUST BE HELD AND INSPECTED/REPAIRED PER THE SERVICE PROCEDURE OF THIS CAMPAIGN BULLETIN BEFORE OWNERS TAKE POSSESSION OF THESE VEHICLES.

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

OWNERS OF VEHICLES RECENTLY SOLD FROM YOUR VEHICLE INVENTORY ARE TO BE CONTACTED BY THE DEALER AND ARRANGEMENTS MADE TO MAKE THE REQUIRED CORRECTION ACCORDING TO INSTRUCTIONS CONTAINED IN THIS BULLETIN.

IN SUMMARY, WHENEVER A VEHICLE SUBJECT TO THIS CAMPAIGN ENTERS YOUR VEHICLE INVENTORY, OR IS IN YOUR DEALERSHIP FOR SERVICE IN THE FUTURE, PLEASE TAKE THE STEPS NECESSARY TO BE SURE THE CAMPAIGN CORRECTION HAS BEEN MADE BEFORE SELLING OR RELEASING THE VEHICLE.

IF THE NAME AND ADDRESS OF THE OWNER OF AN INVOLVED VEHICLE WAS UNAVAILABLE TO GMC TRUCK DIVISION AT THE TIME OF CAMPAIGN INITIATION, THE DEALER MUST DETERMINE THE OWNER'S NAME AND ADDRESS FROM THE DEALERSHIP SALES RECORDS. PLEASE PROVIDE THIS INFORMATION DIRECTLY ON THE SECOND COPY OF THE LISTING NEXT TO THE APPLICABLE VIN SO THAT OUR RECORDS MAY BE UPDATED AND THE APPROPRIATE NOTIFICATION MAILED TO THE OWNER. THIS SECOND COPY SHOULD THEN BE SUBMITTED TO THE ADDRESS LISTED BELOW IN THE PREVIOUSLY SUPPLIED YELLOW CAMPAIGN ENVELOPES.

GMC TRUCK DIVISION GENERAL MOTORS CORPORATION 101 UNION STREET PLYMOUTH, MICHIGAN 48170

OWNER NOTIFICATION

OWNERS WILL BE NOTIFIED OF THIS CAMPAIGN ON THEIR VEHICLES BY (DIVISION) TRUCK DIVISION (SEE COPY OF OWNER LETTER INCLUDED WITH THIS BULLETIN). A LISTING OF OWNER NAMES AND ADDRESSES HAS BEEN FURNISHED TO THE INVOLVED DEALERS TO ENABLE DEALERS TO FOLLOW UP WITH OWNERS INVOLVED IN THIS CAMPAIGN. THIS LISTING 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 TO THIS CAMPAIGN.

SERVICE PROCEDURE

DEALERS WILL BE PROVIDED WITH A SPECIAL WRENCH BY THE ENGINE MANUFACTURING PLANT. 1. REMOVE INTAKE AIR DUCT ASSEMBLY. 2. REMOVE THROTTLE, CRUISE, T.V. CABLE BRACKET, DISCONNECT CABLES FROM THROTTLE LEVER AND POSITION ASSEMBLY ASIDE. 3. DISCONNECT SPARK PLUG WIRES FROM PLUGS AND POSITION WIRES ASIDE (TRUCK MODELS ONLY). 4. DISCONNECT ANY VACUUM HOSES CONNECTED TO ROCKER ARM COVER. 5. REMOVE ROCKER ARM COVER. 6. CLEAN ROCKER ARM COVER AND CYLINDER HEAD MATING SURFACES, AS NECESSARY. NOTE: ROCKER ARM COVER GASKET IS REUSABLE. 7. ACCESS AND TIGHTEN BOTH LIFTER RETAINER BOLTS TO 11 NM (97 LBS. IN.) NOTE: THE LIFTER RETAINER BOLTS CANNOT BE EASILY VIEWED. THEREFORE, THE BOLT HEADS ARE ACCESSED BY FEEL, WHEN FITTING THE SPECIAL WRENCH ONTO THE HEAD OF THE BOLT. DUE TO CYLINDER HEAD GASKET INTERFERENCE, DOWNWARD FORCE MUST BE APPLIED TO THE END OF THE WRENCH FOR POSITIVE WRENCH TO BOLT ENGAGEMENT. DUE TO LIMITED TURNING SPACE, THE BOLT CAN ONLY BE ROTATED APPROXIMATELY 1/8 TURN AT A TIME.

IMPORTANT: UPON APPROACHING SPECIFIED TORQUE, ENSURE THAT TORQUE IS ACTUALLY ACCOMPLISHED RATHER THAN THE WRENCH POSSIBLY BEING STOPPED BY THE CYLINDER HEAD CASTING. (SEE FIGURES 1, 2 TO AID IN ACCESSING BOLT HEADS WITH SPECIAL WRENCH. AS SHOWN IN FIGURE 1, THE BOLTS ARE LOCATED BETWEEN #1, 2 AND #3, 4 INTAKE RUNNERS, DIRECTLY BELOW THE CASTING WEBS).

IMPORTANT: IN THE BOLT HEADS CANNOT BE ACCESSED WITH THE PROVIDED WRENCH, THE BOLT(S) ARE EITHER MISSING OR LOOSENED EXCESSIVELY. IN EITHER CASE, ENGINE DAMAGE HAS PROBABLY OCCURRED AND THE ENGINE WILL NEED TO BE REPLACED UNDER THE ENGINE EXCHANGE PROGRAM.

8. INSTALL ROCKER ARM COVER AND TORQUE BOLTS TO 10 NM (89 LBS. IN.). 9. CONNECT VACUUM HOSES TO ROCKER ARM COVER. 10. CONNECT SPARK PLUG WIRES (TRUCK MODELS ONLY). 11. CONNECT CABLES TO THROTTLE LEVER, INSTALL THROTTLE, CRUISE, T.V. CABLE BRACKET ASSEMBLY. 12. INSTALL AIR CLEANER AND DUCT ASSEMBLY TO THROTTLE BODY ASSEMBLY. 13. ADJUST T.V. CABLE, IF NECESSARY. 14. APPLY THE CAMPAIGN IDENTIFICATION LABEL.

PARTS INFORMATION

TO ENSURE THAT REPLACEMENT PARTS YOUR RETAIL FACILITY MAY REQUIRE ARE OBTAINED AS SOON AS POSSIBLE, ORDER THEM FROM GM SERVICE PARTS OPERATIONS (GMSPO) ON A C.I.O. ORDER, WITH NO SPECIAL INSTRUCTIONS, BUT ORDER ON AN ADVISE CODE 2.

PART NUMBER DESCRIPTION QUANTITY 14090066 ROCKER COVER GASKET 1 ** ENGINE 1 ** IF THE ENGINE REQUIRES REPLACEMENT, CONTACT THE APPROPRIATE DIVISIONAL TECHNICAL ASSISTANCE PER EXISTING ENGINE EXCHANGE POLICY.

WARRANTY INFORMATION

DEALERS SHOULD SUBMIT A WARRANTY CLAIM ON EACH VEHICLE COMPLETED UNDER THIS CAMPAIGN.

LABOR OPERATION NUMBER

DESCRIPTION * TIME ALLOWANCE **PARTS ALLOWANCE TROUBLE CO V9262 LIFTER RETAINER BOLT(S)-TORQUE 0.4 96

V9263 ENGINE ASSEMBLY-REPLACE USE PUBLISHED TIMES FOR LABOR OP J1880 $449.40 96

* FOR DEALER TO RECEIVE ADMINISTRATIVE TIME ALLOWANCE ASSOCIATED WITH THIS CAMPAIGN, ADD 0.1 HOURS FOR LABOR OP V9262, AND 0.3 HOURS FOR V9263 TO THE LABOR OPERATION TIME ALLOWANCE.

** ENGINE OIL IS A NET ITEM. ENGINE COOLANT SHOULD BE REUSED.

CAMPAIGN IDENTIFICATION LABEL

EACH VEHICLE CORRECTED IN ACCORDANCE WITH THE INSTRUCTIONS OUTLINED IN THIS PRODUCT CAMPAIGN BULLETIN WILL REQUIRE A "CAMPAIGN IDENTIFICATION LABEL." EACH LABEL PROVIDES A SPACE TO INCLUDE THE CAMPAIGN NUMBER AND FIVE (5) DIGIT DEALER CODE OF THE DEALER PERFORMING THE CAMPAIGN SERVICE. THIS INFORMATION MAY BE INSERTED WITH A TYPEWRITER OR BALL POINT 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

PROCEDURES COVERING THIS CAMPAIGN ARE OUTLINED IN SECTION V OF YOUR DEALERSHIP'S "GMC TRUCK WARRANTY CLAIMS PROCESSING MANUAL" #P9119 REV. 2/94.

FIGURES: 0

BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THESE 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 TOOLS, EQUIPMENT, 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 YOUR RETAILER FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.