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

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

2. 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.

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.

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.

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.

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)

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)

2. 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.

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

3.

Engine Coolant Air Bleed Pipe (1) - Remove.

4. Engine Rear Noise Shield - Remove.

5.

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

6.

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

7.

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

Installation Procedure

1.

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

2.

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.

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

6.

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

7.

Engine Coolant Air Bleed Pipe (1) - Install.

8. Engine Rear Noise Shield - Install.

9.

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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