For 1990-2009 cars

# INSTRUCT. SHEET CYLINDER HEAD BOLT TIGHTEN. SPEC. INCONSIST.

REVISION 01/29/93

********************************************************************** ************** DEALER COMMUNICATION SYSTEM MESSAGE ******************* ********************************************************************** NOTE: THIS DCS MESSAGE IS REVISED TO CORRECT THE MODEL YEAR REFERENCE IN THE FIRST SENTENCE OF THE TEXT (SHOULD REAL "1987-91" NOT "1987-93" MODEL YEAR). ********************************************************************** ENGINE APPLICATION: SUBJECT: 2.3L (LD2, L40, AND LG0) APPARENT INCONSISTENCY OF CYLINDER HEAD BOLT TIGHTENING SPECIFICATIONS BETWEEN BULLETINS AND SERVICE PART INSTRUCTION SHEETS

ENGINE VIN: VEHICLE APPLICATIONS: A, D, AND 3 1987-93 MODEL YEAR L, N, AND W CARS ______________________________________________________________________

THE 1987-91 MODEL YEAR 2.3L CYLINDER HEAD GASKET SPECIAL POLICY BULLETIN

OLDSMOBILE BULLETIN 91-T-244 CHEVROLET BULLETIN 91-525-6A PONTIAC BULLETIN 91-SM-4 BUICK BULLETIN 91-POL-2

AND THE 1992-93 MODEL YEAR NEW CYLINDER HEAD GASKET, BOLTS, TIGHTENING PROCEDURE AND SERVICE MANUAL UPDATE BULLETIN (CORPORATE REF. 276113) INCORPORATED NEW HEAD GASKETS AND NEW FASTENER TIGHTENING SPECIFICATIONS.

ANY SERVICE PARTS IN THE FIELD PRIOR TO THE PUBLICATION OF THESE TWO BULLETINS WILL HAVE A DIFFERENT HEAD GASKET AND FASTENER TIGHTENING SPECIFICATION ON THE INSTRUCTION SHEET THAN THOSE IDENTIFIED IN THE ABOVE REFERENCED SERVICE BULLETINS.

ALL SERVICE PARTS INSTRUCTION SHEETS CONTAIN THE CORRECT FASTENER TIGHTENING SPECIFICATION FOR THE CYLINDER HEAD GASKET ENCLOSED IN THE PACKAGE.

USE THE FASTENER TIGHTENING SPECIFICATION FROM THE SERVICE PARTS INSTRUCTION SHEET ONLY WITH THE CYLINDER HEAD GASKET ENCLOSED IN THE PACKAGE.

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS ONLY. BULLETINS ARE WRITTEN TO INFORM THESE TECH- NICIANS OF A CONDITION POSSIBLY OCCURRING ON A VEHICLE, OR TO PROVIDE INFORMATION ASSISTING IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS, AND TRAINING TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THE BULLETIN APPLIES TO ALL VEHICLES. SEE AN AUTHORIZED GM DEALER FOR INFORMATION ON WHETHER A SPECIFIC VEHICLE MAY BENEFIT FROM THE INFORMATION.

OPYRIGHT 1993, GM POWERTRAIN DIVISION, GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.