LACK OF A/C COOLING IN CITY TRAFFIC W/ HIGH AMBIENT TEMP.. Cadillac Concours 1996

For 1990-2009 cars

# LACK OF A/C COOLING IN CITY TRAFFIC W/ HIGH AMBIENT TEMP.

REVISION: 06/06/96

THIS BULLETIN IS BEING REVISED TO UPDATE THE LABOR OPERATION INFORMATION. PLEASE DISCARD CORPORATE BULLETIN NUMBER 63-12-05 (SECTION 1 - HVAC). *********************************************************************

#### SUBJECT: LACK OF A/C COOLING IN CITY TRAFFIC WITH HIGH AMBIENT TEMPERATURES (INSTALL NEW SEALS AND ORIFICE TUBE)

#### MODELS: 1994-96 CADILLAC CONCOURS, DEVILLE, ELDORADO, SEVILLE WITH 4.6L AND 4.9L ENGINES (VINS Y, 9, B-RPOS LD8, L37, L26)

#### CONDITION:

SOME OWNERS MAY COMMENT ON A LACK OF SUFFICIENT A/C COOLING IN CITY TRAFFIC WITH HIGH AMBIENT TEMPERATURES, 90 DEGREES FAHRENHEIT, (32 DEGREES CELSIUS) OR GREATER.

#### CORRECTION:

INSTALL SEALS, P/N 25612350, AROUND THE CONDENSER AND RADIATOR TO IMPROVE AIR FLOW ACROSS THE CONDENSER. INSTALL A NEW ORIFICE TUBE, P/N 52460909. THE NEW ORIFICE TUBE IS YELLOW. THIS ORIFICE TUBE WILL INCREASE A/C HIGH SIDE PRESSURES AND SHOULD NOT BE USED WITHOUT THE CONDENSER SEALS INSTALLED.

THE ELDORADO ETC AND SEVILLE STS HAVE AN AUXILIARY ENGINE OIL COOLER THAT IS TO BE REMOVED. REMOVAL OF THIS COOLER WILL IMPROVE AIR FLOW ACROSS THE CONDENSER AND AID IN A/C COOLING. WHEN THE COOLER IS REMOVED, AN ENGINE OIL COOLER LINE, P/N 25630621, AND FITTING, P/N 3541408, HAVE TO BE INSTALLED.

THE DEVILLE REQUIRES REPLACEMENT OF THE ORIFICE TUBE AND THE INSTALLATION OF THE SEALS ON THE LEFT AND RIGHT SIDES OF THE CONDENSER ONLY.

FOLLOW THE PROCEDURE IN THIS BULLETIN FOR INSTALLATION OF THE CONDENSER SEALS, NEW ORIFICE TUBE AND ENGINE OIL COOLER HOSE (ETC AND STS ONLY) FOR THE PARTICULAR VEHICLE BEING SERVICED.

PROCEDURES FOR CONCOURS, ELDORADO, SEVILLE AND 1996 DE VILLE ============================================================

AUXILIARY ENGINE OIL COOLER (ETC AND STS ONLY) - BEFORE VIN BREAKPOINTS: STS 816430 ETC 609432

REMOVE OR DISCONNECT:

1. RAISE VEHICLE. 2. SPLASH SHIELD. 3. RIGHT SPLASH SHIELD. SIX PUSH PINS. 4. A/C COMPRESSOR SPLASH SHIELD. FOUR BOLTS. 5. INLET AND OUTLET LINES FROM AUXILIARY ENGINE OIL COOLER. TWO QUICK CONNECTORS. REFER TO FIGURE 1. 6. INLET OIL COOLER LINE FROM VEHICLE. 7. OIL COOLER LINE FROM ENGINE. 8. OUTLET COOLER LINE FROM VEHICLE. REFER TO FIGURE 2.

INSTALL OR CONNECT:

1. NEW ADAPTER FITTING TO RADIATOR OUTLET. REFER TO FIGURE 3. 2. NEW OIL COOLER LINE FITTING TO RADIATOR OUTLET. REFER TO FIGURE 3. 3. NEW OIL COOLER OUTLET LINE INTO THE OIL FILTER ADAPTER INLET. REFER TO FIGURE 3. 4. A/C COMPRESSOR SPLASH SHIELD. FOUR BOLTS. 5. RIGHT SPLASH SHIELD. SIX PUSH PINS. 6. SPLASH SHIELD. THREE BOLTS. 7. LOWER VEHICLE.

NEW ORIFICE TUBE -

REMOVE OR DISCONNECT:

1. RECOVER A/C SYSTEM. 2. HIGH PRESSURE LIQUID LINE FROM EVAPORATOR INLET LINE. 3. ORIFICE TUBE.

INSTALL OR CONNECT:

1. LUBE O-RINGS WITH 525 OIL. 2. ORIFICE TUBE. 3. HIGH PRESSURE LIQUID LINE FROM EVAPORATOR INLET LINE. 4. RECHARGE A/C SYSTEM. REFER TO BULLETIN #531206.

#### IMPORTANT: IF A DIAGNOSTIC TROUBLE CODE (DTC) FOR LOW REFRIGERANT IS PRESENT AFTER THE A/C SYSTEM IS RECHARGED, REFER TO BULLETIN #531206.

CONDENSER SEALS -

REMOVE OR DISCONNECT:

1. HEADLAMP FILLER PANELS. 2. OIL COOLER BRACKET FROM CONDENSER. THREE NUTS. 3. LOOSEN UPPER RADIATOR BRACKET. FOUR BOLTS. THIS ALLOWS FOR EASIER INSTALLATION OF THE FOAM SEALS.

#### ASSEMBLE:

1. CUT TWO FULL LENGTH FOAM SEALS IN HALF. PEEL OFF THE PAPER BACK AND ADHERE TWO PIECES BACK TO BACK TO MAKE TWO DOUBLE-SIDED SEALS. 2. CUT TWO TEN INCH PIECES FROM ANOTHER FULL LENGTH PIECE OF FOAM SEAL. 3. CUT THE REMAINDER OF THE SEAL INTO TWO FIVE INCH PIECES.

INSTALL OR CONNECT:

1. ONE OF THE DOUBLE SIDED PIECES OF FOAM SEAL ALONG THE RIGHT SIDE OF THE CONDENSER. REFER TO FIGURE 4. 2. ONE OF THE DOUBLE SIDED PIECES OF FOAM SEAL ALONG THE LEFT SIDE OF THE CONDENSER. REFER TO FIGURE 5. 3. ONE FULL LENGTH PIECE OF FOAM SEAL ALONG THE BOTTOM OF THE CONDENSER. PUSH FOAM SEAL UNDERNEATH THE CONDENSER. REFER TO FIGURE 6. 4. ONE FIVE INCH PIECE OF FOAM SEAL AROUND THE CONDENSER LINES AT THE RADIATOR SUPPORT PASS THROUGH. 5. ONE FIVE INCH PIECE OF FOAM SEAL AROUND WIRE HARNESS ON THE RIGHT SIDE OF THE CONDENSER AT THE RADIATOR SUPPORT PASS THROUGH. REFER TO FIGURE 7. 6. UPPER RADIATOR BRACKET. FOUR BOLTS. 7. ADHERE ONE TEN INCH PIECE TO THE LEFT HEADLAMP FILLER PANEL COVER AND TO THE RIGHT HEADLAMP FILLER COVER. THIS WILL PROVIDE A SEAL BETWEEN THE FILLER PANEL AND UPPER TIE BAR. REFER TO FIGURES 8 AND 9.

PROCEDURE FOR 1994-95 DEVILLE =============================

NEW ORIFICE TUBE -

REMOVE OR DISCONNECT:

1. RECOVER A/C SYSTEM. 2. HIGH PRESSURE LIQUID LINE FROM EVAPORATOR INLET LINE. 3. ORIFICE TUBE.

INSTALL OR CONNECT:

1. LUBE O-RINGS WITH 525 OIL. 2. ORIFICE TUBE. 3. HIGH PRESSURE LIQUID LINE FROM EVAPORATOR INLET LINE. 4. RECHARGE A/C SYSTEM. REFER TO BULLETIN #531206.

#### IMPORTANT: IF A DIAGNOSTIC TROUBLE CODE (DTC) FOR LOW REFRIGERANT IS PRESENT AFTER THE A/C SYSTEM IS RECHARGED, REFER TO BULLETIN #531206.

CONDENSER SEALS -

REMOVE OR DISCONNECT:

1. HEADLAMP FILLER PANELS. 2. OIL COOLER BRACKET FROM CONDENSER. THREE NUTS. 3. LOOSEN UPPER RADIATOR BRACKET. FOUR BOLTS. THIS ALLOWS FOR EASIER INSTALLATION OF THE FOAM SEALS.

#### ASSEMBLE:

1. CUT TWO FULL LENGTH FOAM SEALS IN HALF. PEEL OFF THE PAPER BACK AND ADHERE TWO PIECES BACK TO BACK TO MAKE TWO DOUBLE-SIDED SEALS.

INSTALL OR CONNECT:

1. ONE OF THE DOUBLE SIDED PIECES OF FOAM SEAL ALONG THE RIGHT SIDE OF THE CONDENSER. REFER TO FIGURE 4. 2. ONE OF THE DOUBLE SIDED PIECES OF FOAM SEAL ALONG THE LEFT SIDE OF THE CONDENSER. REFER TO FIGURE 5.

#### PARTS INFORMATION:

QUANTITY DESCRIPTION PART NUMBER NEEDED =========== =========== =======

CONDENSER SEALS - 25612350 4 CONCOURS, ELDORADO, SEVILLE

CONDENSER SEALS - 25612350 2 DEVILLE

ORIFICE TUBE 52460909 1

OIL COOLER LINE - 25630621 1 ET, KY ONLY

OIL COOLER FITTING - 3541408 1 ET, KY ONLY

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR LABOR OPERATION DESCRIPTION TIME ========= =========== =====

T2044 IMPROVE A/C PERFORMANCE 1.3 HR

ADD: REMOVE OIL COOLER AND INSTALL 0.5 HR OIL COOLER BYPASS HOSE (APPLIES TO ET AND KY VEHICLES ONLY)

FIGURES: 09 ATTACHMENTS: 00

FIGURE 1: AUXILIARY COOLER INLET AND OUTLET LINES

FIGURE 2: AUXILIARY COOLER REMOVAL

FIGURE 3: RADIATOR OUTLET LINE AND FITTING

FIGURE 4: RIGHT SIDE CONDENSER SEAL

FIGURE 5: LEFT SIDE CONDENSER SEAL

FIGURE 6: BOTTOM CONDENSER SEAL

FIGURE 7: RADIATOR PASSTHROUGH SEAL

FIGURE 8: HEADLAMP FILLER PANEL SEAL (SEVILLE)

FIGURE 9: HEADLAMP FILLER PANEL SEAL (ELDORADO)

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.

COPYRIGHT 1996 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.