SMU - SECTION 6A2 - UPDATED SPECS. & ADDITIONAL SERV. INFO

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6A2 - UPDATED SPECIFICATIONS AND ADDITIONAL SERVICE INFORMATION

MODELS: 1995 OLDSMOBILE AURORA WITH 4.0L ENGINE (VIN C - RPO L47)

THE FOLLOWING INFORMATION REVISES AND/OR ADDS TO THE SERVICE INFORMATION PROVIDED IN THE 1995 G CAR AURORA SERVICE MANUAL. THE PAGES, LOCATIONS, AND EXPLANATION OF REVISIONS AND ADDITIONS TO PRINTED INFORMATION ARE IDENTIFIED BELOW.

LOCATION IN PAGE COMPONENT SERVICE MANUAL REVISION/ADDITION ---- --------- -------------- ----------------- 5 CAMSHAFT COVER FIGURE 4 PRINTED TORQUE SPEC: 10 N.M (7 LBS. IN.) **REVISED TORQUE SPEC**: 10 N.M (89 LBS. IN.)

10 HARMONIC INSTALL OR PRINTED TORQUE SPEC: 145 N.M BALANCER CONNECT (107 LBS. FT.) + 120 DEGREES **REVISED TORQUE SPEC**: 60 N.M (44 LBS. FT.) + 120 DEGREES

12 OIL FILTER INSTALL OR PRINTED TORQUE SPEC: 25 N.M ADAPTER CONNECT (20 LBS. FT.) **REVISED TORQUE SPEC**: 16 N.M (12 LBS. FT.) **ADDITIONAL INFORMATION**: TO ENSURE LUBRICATION SYSTEM PRIMING, IT IS NECESSARY TO FILL THE OIL FILTER WITH PROPER SPECIFICATION ENGINE OIL BEFORE INSTALLATION ON THE OIL FILTER ADAPTER.

15 CYLINDER HEAD INSTALL OR SEE BULLETIN FIGURE 1 FOR CONNECT **REVISED** CYLINDER HEAD BOLT TORQUE SEQUENCE.

18 CAMSHAFT INSTALL OR **ADDITIONAL INFORMATION**: CONNECT STEP 1 - APPLY GM PRELUBE PART NUMBER 1052365 TO THE CAMSHAFT BEARING CAPS, LOBES AND LIFTER FACES.

22 CAMSHAFT INSTALL OR **ADDITIONAL INFORMATION**: CONNECT STEP 8 - APPLY GM PRELUBE PART NUMBER 1052365 TO THE CAMSHAFT BEARING CAPS, LOBES AND LIFTER FACES.

25 OIL PUMP FIGURE 39 **REVISED INFORMATION**: SEE BULLETIN FIGURE 2 FOR TORQUE SEQUENCE TO USE WHEN INSTALLING OIL PUMP ASSEMBLY. **ADDITIONAL INFORMATION**: WHENEVER OIL PUMP REMOVAL IS REQUIRED, IT IS NECESSARY TO PACK THE OIL PUMP WITH AMOJELL(TM) OR WHITE PETROLEUM JELLY. THIS AIDS IN PRIMING THE OIL PUMP FOR PROPER ENGINE LUBRICATION WHEN STARTING THE ENGINE AFTER SERVICE.

28 CYLINDER HEAD FIGURE 47 THE NOMINAL WIDTH FOR THE INTAKE SERVICE AND EXHAUST VALVE SEATS SHOULD BE **0.762** AND **0.90** MM, RESPECTIVELY. NOT 0.065 AND 0.090 MM AS SHOWN IN SERVICE MANUAL FIGURE 47.

29 CYLINDER HEAD FIGURE 50 PRINTED CYLINDER HEAD RESURFACE SERVICE DIMENSION: 8.5 MM **REVISED CYLINDER HEAD RESURFACE DIMENSION**: 10.5 MM

29 CONNECTING ROD INSTALL OR **ADDITIONAL INFORMATION**: BEARINGS CONNECT WHENEVER REPLACING CONNECTING ROD BEARINGS THE CRANKSHAFT JOURNALS MUST BE COATED WITH LUBRIZOL(TM), PART NUMBER 1052367, BEFORE INSTALLING THE CONNECTING RODS.

31 MAIN BEARINGS FIGURE 54 **REVISED INFORMATION**: SEE SERVICE BULLETIN FIGURE 3 FOR REVISED MAIN BEARING BOLT TORQUE SEQUENCE.

37 CONNECTING RODS PISTON **REVISED INFORMATION**: AND PISTONS CLEARANCE AND DISREGARD THE INFORMATION REPLACEMENT CONCERNING THE BORING TOOL SETUP STATED UNDER THE "**IMPORTANT**" NOTE FOR THIS SECTION. CURRENTLY THERE IS **NO OVERSIZED SERVICE PISTON AVAILABLE** FOR THE AURORA ENGINE; THEREFORE, THERE IS NO NEED TO BORE THE CYLINDERS.

N/A BOLT TORQUE N/A **ADDITIONAL INFORMATION**: SPECIFICATIONS SEE SERVICE BULLETIN FIGURES 4, 5 AND 6 FOR COMPLETE ENGINE BOLT TORQUE SPECIFICATIONS.

WE BELIEVE THESE SOURCES AND THEIR PRODUCTS TO BE RELIABLE. THERE MAY BE ADDITIONAL MANUFACTURERS OF SUCH PRODUCTS. GENERAL MOTORS DOES NOT ENDORSE, INDICATE ANY PREFERENCE FOR OR ASSUME ANY RESPONSIBILITY FOR THE PRODUCTS FROM THESE FIRMS OR FOR ANY SUCH ITEMS WHICH MAY BE AVAILABLE FROM OTHER SOURCES.

FIGURES: 3 ATTACHMENTS: 3

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.