INFO. ON CRANKSHAFT BALANCER

REVISED: 05/08/95

THIS BULLETIN IS BEING REVISED TO CORRECT PROPER ENGINE TO MATCH

PROPER PART NUMBERS. PLEASE DISCARD BULLETIN 47-61-43 (FILED IN SECTION 6 - ENGINE). *********************************************************************

SUBJECT: INFORMATION ON UPDATED CRANKSHAFT BALANCER

MODELS: 1993 CADILLAC ALLANTE 1993-94 CADILLAC ELDORADO AND SEVILLE WITH 4.6L ENGINES (VINS Y, 9 - RPOS LD8, L37)

1993 CADILLAC ELDORADO, FLEETWOOD AND SEVILLE 1993-94 CADILLAC DEVILLE WITH 4.9L ENGINE (VIN B - RPO L26)

THE CRANKSHAFT BALANCER FOR THE ENGINES IDENTIFIED ABOVE HAS BEEN UPDATED. THE NEW BALANCER IS NOW COMPOSED OF NODULAR IRON VERSUS THE PREVIOUS DESIGN'S GREY IRON.

WHENEVER SERVICING THESE ENGINES AND CRANKSHAFT BALANCER REMOVAL IS REQUIRED, REFER TO THE PROPER SERVICE PROCEDURES OUTLINED IN SERVICE MANUAL SECTION 6A2, TO ENSURE PART INTEGRITY AND PROPER INSTALLATION. USE SPECIAL TOOL J38416-B TO REMOVE THE BALANCER FROM THE CRANKSHAFT AND INSTALL IT USING THE CRANKSHAFT BALANCER MOUNTING BOLT. **DO NOT PRY THE CRANKSHAFT BALANCER OFF THE CRANKSHAFT.**

IF SERVICING A CRANKSHAFT BALANCER STAMPED WITH THE PART NUMBER 3542045, REPLACE THE BALANCER WITH THE PART NUMBER LISTED BELOW:

GREY IRON P/N NODULAR IRON ENGINE (PREVIOUS) P/N (NEW) ------ ------------- ------------ 4.9L 3542045 12552436 4.6L 3542045 12552437

PARTS ARE EXPECTED TO BE AVAILABLE ON JUNE 5, 1995.

THE PART NUMBER IS LOCATED ON ONE OF THE THREE LEGS EXTENDING TO THE OUTER RING OF THE BALANCER. IF THE BALANCER BEING SERVICED IS STAMPED WITH THE PART NUMBER 3542045, ALWAYS REPLACE THE BALANCER WITH THE SPECIFIED NEW PART NUMBER.

THE PART NUMBER FOR THE UPDATED BALANCER IS CAST AS 1255243- ON THE LEG WITH THE REMAINDER OF THE NUMBER LOCATED ON THE OUTER RING (SEE FIGURE 1). THE OUTER RING NUMBER WILL BEGIN WITH A "6" INDICATING THE BALANCER IS FOR A 4.9L ENGINE AND A "7" FOR 4.6L ENGINES. THE NEXT DIGIT INDICATES MODEL YEAR AND THE REMAINDER IDENTIFY THE THE JULIAN DATE, THE DAY OF THE YEAR THE BALANCER WAS PRODUCED. ASIDE FROM THE "6" CAST INTO THE OUTER RING, THE 4.9L CRANKSHAFT BALANCER IS ALSO IDENTIFIED BY THE KEY WAY SLOT CAST INTO THE BALANCER.

WHEN INSTALLING A NEW CRANKSHAFT BALANCER ON 4.6L OR 4.9L ENGINES, USE THE TORQUE SPECIFICATION LISTED BELOW:

DESCRIPTION 4.6L ENGINE 4.9L ENGINE ----------- ----------- ----------- CRANKSHAFT BALANCER 60 N.M + 120 DEGREES 160 N.M (118 LB.FT.) BOLT (44 LB. FT. + 120 DEGREES)

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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