TICKING, RATTLING, KNOCK, OR CLANGING NOISE FROM ENG. COMP.. Cadillac Allante 1993

For 1990-2009 cars

# TICKING, RATTLING, KNOCK, OR CLANGING NOISE FROM ENG. COMP.

#### SUBJECT: TICKING, RATTLING, KNOCK OR CLANGING NOISE FROM THE FLYWHEEL AREA OF THE ENGINE (INSTALL DOWEL PIN)

#### MODELS: 1993 CADILLAC ALLANTE 1993-94 CADILLAC ELDORADO AND SEVILLE 1994 CADILLAC CONCOURS EQUIPPED WITH 4.6L NORTHSTAR ENGINE (RPOS LD8 AND L37 - VINS Y AND 9)

#### CONDITION:

SOME OWNERS MAY EXPERIENCE A TICKING, RATTLING, KNOCK OR CLANGING TYPE NOISE FROM THE FLYWHEEL AREA OF THE ENGINE. THIS NOISE IS USUALLY LOUDEST AT IDLE AND DRIVE RANGES.

#### CAUSE:

THE NOISE MAY BE CAUSED BY A CRACKED OR LOOSE FLYWHEEL. FLYWHEEL DAMAGE MAY BE CAUSED BY MISALIGNMENT OF THE ENGINE TO THE TRANSAXLE DUE TO INCORRECT ENGINE BLOCK DOWEL PIN HEIGHT AND/OR MISSING DOWEL PINS.

#### CORRECTION:

INSTALL THE DOWEL PIN TO A HEIGHT OF 9.5 MM FROM THE REAR BLOCK FACE (FIGURE 1). IF A DOWEL PIN HAS A HEIGHT GREATER THAN 9.5 MM FROM THE REAR BLOCK FACE, IT MUST BE DRIVEN IN TO THE CORRECT HEIGHT. REFER TO THE 1993 ELDORADO/SEVILLE SERVICE MANUAL, SECTION 6A2, FOR ENGINE FLYWHEEL REPLACEMENT PROCEDURES.

#### PART INFORMATION:

WHEN A DOWEL PIN IS REQUIRED, USE P/N 12338076.

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION: J1400 USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 1

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 1994. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.