SMU - SECTION 6A CAMSHAFT TIMING GEAR CHANGE

REVISION: 08/26/95

THIS BULLETIN IS BEING REVISED TO ADD THE 1993 AND 1995 MODEL YEARS AND TO CLARIFY THE TIMING GEAR INSTALLATION PROCEDURE. PLEASE DISCARD BULLETIN 436101 (GROUP REFERENCE 6 - ENGINE).

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SUBJECT: SECTION 6A1 - CAMSHAFT TIMING GEAR REMOVAL AND INSTALLATION

MODELS: 1993-95 GEO METRO

A RUNNING PRODUCTION CHANGE WAS MADE TO THE CAMSHAFT TIMING GEAR WHICH NECESSITATES AN ADDITIONAL PROCEDURE. IF THIS PROCEDURE IS NOT FOLLOWED, SEVERE DAMAGE TO THE VALVETRAIN OR PISTONS COULD RESULT.

THE CAMSHAFT GEAR ON THIS VEHICLE CAN HAVE EITHER A SOLID OR SPOKED INTERIOR. IF THE CAMSHAFT TIMING GEAR IS A SOLID DESIGN, DISREGARD THIS PROCEDURE.

WHEN INSTALLING THE CAMSHAFT TIMING GEAR, IT IS IMPORTANT TO NOTE THAT THERE ARE TWO (2) REFERENCE POINTS AND ONE (1) TIMING MARK. WHEN PROPERLY INSTALLED, THE CAMSHAFT PULLEY PIN SHOULD ENGAGE WITH CAMSHAFT TIMING GEAR SLOT NO. 1. THIS WILL PLACE THE TIMING MARK AND REFERENCE MARK "A" AT ABOUT THE EIGHT O'CLOCK POSITION, AND REFERENCE MARK "B" WILL BE ALIGNED WITH THE "V" MARK ON CYLINDER HEAD COVER (FIGURE 1).

IMPORTANT

REFER TO SECTION 6A1 "TIMING BELT AND TENSIONER" FOR CORRECT INSTALLATION OF TIMING BELT.

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.

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