DIESEL WATER PUMP R&R SERVICE MANUAL REVISION

VEHICLES AFFECTED: ALL 1982 AND 1983 'G' MODELS EQUIPPED WITH THE 4.3L V6 DIESEL (VIN CODE V) THE FOLLOWING IS THE REVISED WATER PUMP R & R PROCEDURE FOR THE 1982 AND 1983 'G' MODELS EQUIPPED WITH A 4.3L V-6 DIESEL ENGINE (VIN CODE V). 1. DRAIN THE COOLANT IN THE RADIATOR, SEE 'DRAINING AND REFILLING COOLING SYSTEM' (REFER TO SECTION 6B IN THE CHASSIS SERVICE MANUAL). 2. REMOVE THE FAN CLUTCH AND FAN. 3. DISCONNECT THE RADIATOR INLET HOSE AT THE RADIATOR. 4. REMOVE THE UPPER RADIATOR SUPPORT. 5. REMOVE THE SERPINE BELT, (REFER TO SECTION 6A6 IN THE CHASSIS AND SERVICE MANUAL). REMOVE THE WATER PUMP PULLEY. 6. REMOVE THE VACUUM PUMP WITH BRACKET ATTACHED (REFER TO SECTION 6H OF THE CHASSIS SERVICE MANUAL). 7. REMOVE THE CRUISE CONTROL SERVO MOUNTING BRACKET, IF SO EQUIPPED. (REFER TO SECTION 9 IN THE CHASSIS SERVICE MANUAL). 8. REMOVE THE POWER STEERING PUMP AND BRACKETS FROM THE ENGINE. LEAVE HOSES ATTACHED AND PLACE IT BESIDE THE ENGINE. (REFER TO SECTION 3B3 IN THE CHASSIS SERVICE MANUAL). 9. DISCONNECT THE HEATER AND RADIATOR OUTLET HOSES AT THE WATER PUMP AND LOOSEN THE THERMOSTAT BY-PASS HOSE CLAMP. 10. REMOVE THE WATER PUMP TO FRONT COVER BOLTS AND WATER PUMP AND FRONT COVER TO BLOCK BOLTS. REMOVE THE WATER PUMP FROM THE FRONT COVER. 11. REMOVE ANY DIRT AND OLD SEALER FROM THE WATER PUMP FASTENERS. REMOVE ANY TRACES OF GASKET MATERIAL FROM THE WATER PUMP AND FRONT COVER. 12. COAT THE GASKET SURFACES WITH SEALER, GM PART #5725836 OR EQUIVALENT. COAT THE WATER PUMP TO BLOCK BOLTS WITH PRIMER AND ADHESIVE GM PART NO. 1052624 OR EQUIVALENT. NOTICE: THE WATER PUMP AND FRONT COVER TO BLOCK BOLTS MUST BE COATED WITH PRIMER AND ADHESIVE, GM PART NO. 1052624 OR EQUIVALENT TO AVOID COOLANT LEAKS AND LOSS OF BOLT TORQUE. 13. TRANSFER THE WATER PUMP PULLEY STUDS IF A REPLACEMENT PUMP IS BEING INSTALLED. TORQUE STUDS TO 9 N.M. (7 LBS. FT.) 14. PLACE A NEW WATER PUMP TO FRONT COVER GASKET ON THE PUMP. INSTALL THE PUMP BY-PASS HOSE INLET FITTING INTO THE BY-PASS HOSE. PLACE THE PUMP ON THE FRONT COVER. INSTALL THE WATER PUMP AND FRONT COVER TO BLOCK BOLTS, TORQUE TO 47 N.M. (35 LBS. FT.). INSTALL THE WATER PUMP TO FRONT COVER BOLTS AND TORQUE TO 18 N.M. (13 LBS. FT.). 15. INSTALL THE HEATER AND RADIATOR HOSE ON THE WATER PUMP. TORQUE THE HEATER, RADIATOR AND BY-PASS HOSE CLAMPS TO 1.7 N.M. (L5 LBS. IN.). 16. INSTALL THE POWER STEERING PUMP ON THE ENGINE AND TORQUE THE BOLTS TO SPECIFICATIONS. (REFER TO SECTION 3B3 IN THE CHASSIS SERVICE MANUAL). 17. IF EQUIPPED WITH CRUISE CONTROL, INSTALL THE CRUISE CONTROL SERVO MOUNTING BRACKET, TORQUE THE BOLTS TO SPECIFICATIONS. (REFER TO SECTION 9 IN THE CHASSIS SERVICE MANUAL). 18. INSTALL THE VACUUM PUMP AND BRACKET. TORQUE BOLTS TO SPECIFI- CATIONS. (REFER TO SECTION 6H - 1983 OR 6A6 - 1982 IN THE CHASSIS SERVICE MANUAL). 19. INSTALL THE WATER PUMP PULLEY. INSTALL THE SERPINTINE BELT (REFER TO SECTION 6A6 IN THE CHASSIS SERVICE MANUAL). 20. INSTALL THE UPPER RADIATOR SUPPORT. 21. INSTALL THE RADIATOR INLET HOSE. TORQUE THE HOSE CLAMP TO 1.7 N.M (15 LBS. IN.). 22. INSTALL THE FAN AND FAN CLUTCH, TORQUE NUTS TO 28 N.M (20 LBS. FT.). 23. REFILL THE COOLING SYSTEM, SEE 'DRAINING AND REFILLING COOLANT SYSTEM'. 24. INSPECT COOLING SYSTEM FOR LEAKS.

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