Buick Regal Owners & Service Manuals
Buick Regal 2018-2025 Service Manual / Engine / Engine Cooling / Repair Instructions / Radiator Replacement (3.6L LGX)

Buick Regal: Radiator Replacement (3.6L LGX)

Removal Procedure

1. Drain the cooling system.

2. Front Bumper Fascia - Remove.

3.

Engine Cooling

Hood Primary Latch Mount Panel Bracket (3) - Remove.

4. Recover the refrigerant.

5.

Engine Cooling

Air Conditioning Condenser Bracket (1) - Remove.

6. Transmission Fluid Cooler Inlet and Outlet Pipe Retainer @ Engine Cooler Fan - Remove.

7.

Engine Cooling

Transmission Fluid Cooler Inlet Pipe (1) @ Radiator - Remove.

8.

Engine Cooling

Transmission Fluid Cooler Outlet Pipe (2) @ Radiator - Remove.

9. Intake Air Duct - Remove.

10.

Engine Cooling

Remove the engine coolant fan wiring harness ground nut (1).

11. Remove the engine coolant fan wiring harness (2) from the front end upper tie bar support.

12. Retainer @ Radiator - Unclip.

13.

Engine Cooling

Electrical Connector (1) - Disconnect [2x].

14.

Engine Cooling

Clamp (4) - Disengage.

15. Radiator Inlet Hose (3) - Remove.

16. Radiator Upper Bracket (5) - Remove.

17.

Engine Cooling

Clamp (1) - Disengage.

18. Radiator Outlet Hose (2) @ Radiator - Remove.

19.

Engine Cooling

Radiator Upper Bracket (3) - Remove.

20.

Engine Cooling

Radiator Sleeve (3) - Remove.

21.

Engine Cooling

Radiator Assembly (1) - Remove.

22. Radiator Lower Insulator (2) - Remove [2x].

23.

Engine Cooling

Engine Coolant Fan Shroud Clip (1) @ Engine Coolant Fan - Remove.

24.

Engine Cooling

Engine Coolant Fan Shroud Bolt (3) - Remove [2x].

25. Engine Coolant Fan (2) @ Radiator (1) - Remove.

26.

Engine Cooling

Radiator Upper Bracket (1) - Remove [2x].

27. Radiator Lower Bracket (4) - Remove [2x].

28. Remove the 4 radiator nuts (2, 5).

Installation Procedure

1.

Engine Cooling

Install the 4 radiator nuts (2, 5).

2. Radiator Upper Bracket (1) - Install [2x].

3. Radiator Lower Bracket (4) - Install [2x].

4.

Engine Cooling

Engine Coolant Fan (2) @ Radiator (1) - Install.

CAUTION: Refer to Fastener Caution.

5. Engine Coolant Fan Shroud Bolt (3) - Install and tighten [2x] 5.1N.m (45 lb in).

6.

Engine Cooling

Engine Coolant Fan Shroud Clip (1) @ Engine Coolant Fan - Install.

7. Radiator Lower Insulator (2) - Install [2x].

8.

Engine Cooling

Radiator Assembly (1) - Install.

9.

Engine Cooling

Radiator Sleeve (3) - Install.

10.

Engine Cooling

Radiator Upper Bracket (3) - Install.

11.

Engine Cooling

Radiator Outlet Hose (2) @ Radiator - Install.

12. Clamp (1) - Engage.

13.

Engine Cooling

Radiator Upper Bracket (5) - Install.

14. Radiator Inlet Hose (3) - Install.

15. Clamp (4) - Engage.

16.

Engine Cooling

Electrical Connector (1) - Connect [2x].

17. Retainer @ Radiator - Install.

18.

Engine Cooling

Install the engine coolant fan wiring harness (2) to the front end upper tie bar support.

19. Install and tighten the engine coolant fan wiring harness ground nut (1).

20. Intake Air Duct - Install.

21.

Engine Cooling

Transmission Fluid Cooler Outlet Pipe (2) @ Radiator - Install.

22.

Engine Cooling

Transmission Fluid Cooler Inlet Pipe (1) @ Radiator - Install.

23. Transmission Fluid Cooler Inlet and Outlet Pipe Retainer @ Engine Cooler Fan - Install.

24.

Engine Cooling

Air Conditioning Condenser Bracket (1) - Install.

25.

Engine Cooling

Hood Primary Latch Mount Panel Bracket (3) - Install.

26. Recharge the refrigerant.

27. Front Bumper Fascia - Install.

28. Fill the cooling system.

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