Buick Regal Owners & Service Manuals
Buick Regal 2018-2024 Service Manual / Engine / Engine Cooling / Repair Instructions / Thermostat Bypass Hose Replacement (2.0L LTG)

Buick Regal: Thermostat Bypass Hose Replacement (2.0L LTG)

Engine Cooling

Preliminary Procedures

1. Drain the cooling system.

2. Radiator Inlet Hose @ Water Outlet - Remove.

  1. Thermostat Bypass Hose Clamp [2x]

Procedure

Hose Clamp Replacement Guidelines - Spring Type

  1. Thermostat Bypass Hose

Procedure

1. Radiator Inlet Hose @ Water Outlet - Install.

2. Fill the cooling system. 3. Check the cooling system for leaks.

WATER PUMP INLET PIPE REPLACEMENT (3.6L LGX)

Removal Procedure

1. Drain the cooling system.

2. Generator - Remove.

3.

Engine Cooling

Radiator Outlet Hose Clamp (1) - Disconnect.

4. Radiator Outlet Hose (2) @ Water Pump Inlet Pipe - Remove.

5. Water Pump Inlet Pipe Bolt (3) - Remove.

6.

Engine Cooling

Water Pump Inlet Pipe Bolt (1) - Remove [2x].

7. Water Pump Inlet Pipe (2) - Remove.

8. Water Pump Inlet Pipe Seal (3) - Remove and DISCARD.

Installation Procedure

1.

Engine Cooling

Water Pump Inlet Pipe Seal (3) - Install NEW.

2. Water Pump Inlet Pipe (2) - Install.

CAUTION: Refer to Fastener Caution.

3. Water Pump Inlet Pipe Bolt (1) - Install and tighten [2x] 15 N.m (11 lb ft).

4.

Engine Cooling

Water Pump Inlet Pipe Bolt (3) - Install and tighten15 N.m (11 lb ft).

5. Radiator Outlet Hose (2) @ Water Pump Inlet Pipe - Install.

6. Radiator Outlet Hose Clamp (1) - Connect.

7. Generator - Install.

8. Fill the cooling system.

9. Start the engine and check for leaks.

ENGINE COOLANT THERMOSTAT HOUSING REPLACEMENT (2.0L LTG)

Engine Cooling

Preliminary Procedure

Radiator Outlet Hose Replacement (2.0L LTG) or Radiator Outlet Hose Replacement (3.6L LGX without Engine Oil Cooler) or Radiator Outlet Hose Replacement (3.6L LGX with Engine Oil Cooler).

  1. Engine Coolant Thermostat Housing Bolt [2x]

CAUTION: Refer to Fastener Caution.

Tighten 10 N.m (89 lb in)

  1. Engine Coolant Thermostat Housing

Procedure

Install a NEW engine coolant thermostat housing seal.

ENGINE COOLANT THERMOSTAT HOUSING REPLACEMENT (3.6L LGX)

Removal Procedure

1. Drain the cooling system.

2.

Engine Cooling

Fuel Injection Fuel Rail Noise Shield (1) - Remove.

3.

Engine Cooling

Engine Coolant Air Bleed Pipe (1) - Remove.

4. Engine Rear Noise Shield - Remove.

5.

Engine Cooling

Engine Coolant Thermostat Housing Inlet Pipe Bolt (1) - Remove.

6.

Engine Cooling

Using a suitable flat bladed tool as shown, separate the engine coolant thermostat housing inlet pipe from the thermostat housing.

7.

Engine Cooling

Engine Coolant Thermostat Housing Bolt (1) - Remove [2x].

8. Engine Coolant Thermostat Housing (2) - Remove.

9. Engine Coolant Thermostat Housing Seal (3) - Remove and DISCARD.

10.

Engine Cooling

Engine Coolant Thermostat Housing Inlet Pipe O-ring Seal (1) - Remove and DISCARD.

Installation Procedure

1.

Engine Cooling

Engine Coolant Thermostat Housing Inlet Pipe O-ring Seal (1) - Install NEW.

2.

Engine Cooling

Engine Coolant Thermostat Housing Seal (3) - Install NEW.

3. Engine Coolant Thermostat Housing (2) - Install.

CAUTION: Refer to Fastener Caution.

4. Engine Coolant Thermostat Housing Bolt (1) - Install and tighten [2x] 10 N.m (89 lb in).

5.

Engine Cooling

Insert the engine coolant thermostat housing inlet pipe (1) to the thermostat housing.

6.

Engine Cooling

Engine Coolant Thermostat Housing Inlet Pipe Bolt (1) - Install and tighten 10 N.m (89 lb in).

7.

Engine Cooling

Engine Coolant Air Bleed Pipe (1) - Install.

8. Engine Rear Noise Shield - Install.

9.

Engine Cooling

Fuel Injection Fuel Rail Noise Shield (1) - Install.

10. Fill the cooling system.

11. Start the engine and check for leaks.

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