SQUEAK/POP DURING GARAGE SHIFTS AND/OR ACCELERATION. Pontiac Tempest (Canada) 1994

REVISION: 09/21/94

THIS BULLETIN IS BEING REVISED TO CORRECT A PART NUMBER IN THE "SERVICE INFORMATION" SECTION. PLEASE DISCARD BULLETIN 476601 (GROUP REFERENCE 6 - ENGINE). ______________________________________________________________________

SUBJECT: SQUEAK, SQUEAL OR POP NOISE DURING GARAGE SHIFTS AND ACCELERATION (REPLACE THE EXHAUST MANIFOLD PIPE SEAL)

MODELS: 1994 CHEVROLET BERETTA/CORSICA AND CAVALIER 1994 PONTIAC SUNBIRD WITH 2.0L OR 2.2L ENGINE (VINS H, 4 - RPOS LE4, LN2)

CONDITION:

SOME OWNERS MAY COMMENT ABOUT A SQUEAK NOISE DURING HEAVY LOAD (I.E., WIDE-OPEN-THROTTLE, GOING OVER BUMPS) WHILE DRIVING. THE SQUEAK MAY ALSO OCCUR WHEN SHIFTING INTO DRIVE OR REVERSE (WHEN THE ENGINE MOVES ON ITS MOUNTS) WHILE THE VEHICLE IS STOPPED.

CAUSE:

THE SQUEAK NOISE IS CAUSED BY THE EXHAUST MANIFOLD PIPE SEAL WHEN THE EXHAUST SYSTEM MOVES.

CORRECTION:

REPLACE THE EXHAUST MANIFOLD PIPE SEAL WITH P/N 24570693. THE NEW PART HAS BEEN CHANGED TO CORRECT THIS CONDITION.

VEHICLES BUILT AFTER THE FOLLOWING BREAKPOINTS HAVE THE UPDATED EXHAUST SEAL ON THEM:

DIVISION PLANT VIN -------- ----- --- CHEVROLET LORDSTOWN R7172419 CHEVROLET RAMOS RS817568 CHEVROLET WILMINGTON RY123967 PONTIAC LORDSTOWN R7529239 PONTIAC RAMOS RS817573

SERVICE INFORMATION:

1. RAISE VEHICLE AND SUPPORT (REFER TO SECTION 0A IN THE APPROPRIATE SERVICE MANUAL). 2. REMOVE BOLT AND SPRING ASSEMBLIES. 3. REMOVE OLD SEAL AND CLEAN SEAL SURFACES. 4. INSTALL NEW SEAL, P/N 24570693. 5. INSTALL BOLT AND SPRING ASSEMBLIES. TIGHTEN TO 35 N.M (26 LBS. FT.) 6. LOWER VEHICLE.

PARTS INFORMATION:

DESCRIPTION PART NUMBER ----------- ----------- SEAL ASM, EXHAUST MANIFOLD PIPE 24570693

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY USE: LABOR OPERATION: L2090 USE PUBLISHED LABOR TIMES.

FIGURES: 0

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.