Chevrolet Trax: Coolant system flushing

NOTE:

• Do not use a chemical flush.
• Store used coolant in the proper manner, such as in a used engine coolant holding tank.
• Do not pour used coolant down a drain. Ethylene glycol antifreeze is a very toxic chemical.
• Do not dispose of coolant into the sewer system or ground water. This is illegal and ecologically unsound.
• Various methods and equipment can be used to flush the cooling system.

  If special equipment is used, such as a back flusher, follow the manufactures instruction. However, always remove the thermostat before back flushing the system.

1. Apply the parking brake.
2. Drain the coolant. Refer to Cooling System Draining and Filling.
3. Fill the cooling system with clean drinkable water. Refer to Cooling System Draining and Filling.
4. Start the engine and run at 2,000 RPM until the thermostat opens.
5. Turn OFF the engine.
6. Drain the coolant system. Refer to Cooling System Draining and Filling.
7. Repeat the above procedure until the water from the coolant system is colorless.
8. Drain the coolant system. Refer to Cooling System Draining and Filling.
9. Repeat the above procedure until the water from the coolant system is colorless. Refer to Cooling System Draining and Filling.

RADIATOR CLEANING

WARNING: NEVER spray water on a hot heat exchanger. The resulting steam could cause personal injury.

CAUTION: The heat exchanger fins are necessary for good heat transfer. Do not brush the fins. This may cause damage to the fins, reducing heat transfer.

NOTE:

Blow compressed air through the engine side of the radiator to remove any foreign material, such as insects, leaves, and dust.

• Warm water and mild soap may be needed in some conditions.
• Wash the A/C condenser fin.
• Wash the A/C condenser and radiator thoroughly.
• Wash the radiator cooling fin.
• Repair any damaged cooling fin.

RADIATOR SURGE TANK REPLACEMENT (LUV, 2H0, LUJ)

Fig. 6: Radiator Surge Tank

Radiator Surge Tank Replacement (LUV, 2H0, LUJ)

RADIATOR SURGE TANK OUTLET HOSE REPLACEMENT (LUJ, LUV)

Fig. 7: Radiator Surge Tank Outlet Hose

Radiator Surge Tank Outlet Hose Replacement (LUJ, LUV)

RADIATOR SURGE TANK OUTLET HOSE REPLACEMENT (2H0)

Fig. 8: Radiator Surge Tank Outlet Hose

Radiator Surge Tank Outlet Hose Replacement (2H0)

RADIATOR INLET HOSE REPLACEMENT (LUJ, LUV)

Fig. 9: Radiator Inlet Hose (LUJ, LUV)

Radiator Inlet Hose Replacement (LUJ, LUV)

RADIATOR INLET HOSE REPLACEMENT (2H0)

Fig. 10: Radiator Inlet Hose (2H0)

Radiator Inlet Hose Replacement (2H0)

RADIATOR OUTLET HOSE REPLACEMENT (LUJ, LUV)

Fig. 11: Radiator Outlet Hose (LUJ, LUV)

Radiator Outlet Hose Replacement (LUJ, LUV)

RADIATOR OUTLET HOSE REPLACEMENT (2H0)

Fig. 12: Radiator Outlet Hose (2H0)

Radiator Outlet Hose Replacement (2H0)

RADIATOR OUTLET HOSE CONNECTOR REPLACEMENT - RADIATOR SIDE (LUJ, LUV)

Fig. 13: Radiator Outlet Hose Connector - Radiator Side (LUV)

Radiator Outlet Hose Connector Replacement - Radiator Side (LUJ, LUV)

RADIATOR OUTLET HOSE CONNECTOR REPLACEMENT - ENGINE SIDE (LUJ, LUV)

Fig. 14: Radiator Outlet Hose Connector - Engine Side (LUV)

Radiator Outlet Hose Connector Replacement - Engine Side (LUJ, LUV)

RADIATOR MOUNTING STUD REPAIR

Repair Procedure

NOTE:

If the radiator is leaky, replace it. Refer to Radiator Replacement (LUJ, LUV), Radiator Replacement (2HO, LDE).

1. Pressure test the cooling system. Refer to Cooling System Leak Testing.

Fig. 15: Identifying Fracture Surface

2. Grind the fracture surface (1) with a proper tool.
3. Drill a hole in the center of the fractured surface, using a 6 mm (0.24 in) drill.

Fig. 16: Radiator Mounting Pin, Nut And Bolt

4. Install the new radiator mounting pin (2).

• Install the nut (3).

NOTE: The bolt should not be longer than 35 mm (1.38 in).

• Install the radiator mounting pin (2) with the bolt (1).

CAUTION: Refer to Fastener Caution .

5. Tighten the bolt 5 N.m (44 lb in).

RADIATOR UPPER BRACKET REPLACEMENT (2H0)

Fig. 17: Radiator Upper Bracket (2H0)

Radiator Upper Bracket Replacement (2H0)

RADIATOR UPPER BRACKET REPLACEMENT (LUJ, LUV)

Fig. 18: Radiator Upper Bracket

Radiator Upper Bracket Replacement (LUJ, LUV)

THROTTLE BODY HEATER INLET HOSE REPLACEMENT (2H0)

Fig. 19: Throttle Body Heater Inlet Hose (2H0)

Throttle Body Heater Inlet Hose Replacement (2H0)

THROTTLE BODY HEATER INLET PIPE REPLACEMENT (2H0)

Fig. 20: Throttle Body Heater Inlet Pipe (2H0)

Throttle Body Heater Inlet Pipe Replacement (2H0)

THROTTLE BODY HEATER OUTLET PIPE REPLACEMENT (2H0)

Fig. 21: Throttle Body Heater Outlet Pipe (2H0)

Throttle Body Heater Outlet Pipe Replacement (2H0)

THROTTLE BODY HEATER OUTLET HOSE REPLACEMENT (2H0)

Fig. 22: Throttle Body Heater Outlet Hose (2H0)

Throttle Body Heater Outlet Hose Replacement (2H0)

ENGINE OIL COOLER COOLANT INLET HOSE REPLACEMENT (LUJ)

Fig. 23: Engine Oil Cooler Coolant Inlet Hose

Engine Oil Cooler Coolant Inlet Hose Replacement (LUJ)

ENGINE OIL COOLER PIPE REPLACEMENT (2H0, LDE)

Fig. 24: Engine Oil Cooler Pipe (SHO)

Engine Oil Cooler Pipe Replacement (2H0, LDE)

ENGINE OIL COOLER INLET PIPE REPLACEMENT (2H0, LDE)

Removal Procedure

1. Drain the cooling system. Refer to Cooling System Draining and Filling.
2. Remove the exhaust manifold with catalytic converter.

Fig. 25: Identifying Engine Oil Cooler Outlet Pipe And Bolts

3. Remove the engine oil cooler pipe bolts (1) and the engine oil cooler pipe (2).

Fig. 26: Engine Oil Cooler Outlet Pipe Bracket And Bolts

4. Remove the engine oil cooler outlet pipe bolts (1) and the engine control module (ECM) harness bracket (2).

Fig. 27: Engine Oil Cooler Assembly Components

5. Remove the engine oil cooler assembly bolts (1) and remove the cooler (2).
6. Remove the engine oil cooler inlet pipe (4) and seals (3).

Installation Procedure

1. Replace the seals on the engine oil cooler outlet pipe and the engine oil cooler pipe.

Fig. 28: Engine Oil Cooler Assembly Components

2. Install the engine oil cooler inlet pipe (4) with NEW seals (3) to the engine oil cooler assembly.
3. Position the engine oil cooler assembly (2) to the engine block.

CAUTION: Refer to Fastener Caution .

4. Install the engine oil cooler assembly bolts (1) and tighten to 25 N.m (19 lb ft).

Fig. 29: Engine Oil Cooler Outlet Pipe Bracket And Bolts

5. Install the engine oil cooler outlet pipe mounting bolts (1) and ECM bracket (2) to the water pump housing and tighten to 8 N.m (71 lb in).

Fig. 30: Identifying Engine Oil Cooler Outlet Pipe And Bolts

6. Install the engine oil cooler pipe (2) to the thermostat housing and tighten bolts (1) to 8 N.m (71 lb in).
7. Install the exhaust manifold with catalytic converter.
8. Fill the cooling system. Refer to Cooling System Draining and Filling.
9. Start the engine and check for coolant leaks.

ENGINE OIL COOLER INLET PIPE REPLACEMENT (LUJ)

Fig. 31: Engine Oil Cooler Inlet Pipe (LUJ)

Engine Oil Cooler Inlet Pipe Replacement (LUJ)

ENGINE COOLANT FAN REPLACEMENT (LUJ, LUV)

Fig. 32: Engine Coolant Fan

Engine Coolant Fan Replacement (LUJ, LUV)

ENGINE COOLANT FAN REPLACEMENT (2H0)

Fig. 33: Engine Coolant Fan (2H0)

Engine Coolant Fan Replacement (2H0)

TURBOCHARGER COOLANT FEED PIPE REPLACEMENT (LUJ)

Special Tools

EN-49940 Remover Quick Connector

For equivalent regional tools, refer to Special Tools.

Removal Procedure

1. Remove the turbocharger. Refer to Turbocharger Replacement

Fig. 34: Turbocharger Coolant Feed Pipe

NOTE: The quick fitting connectors should be always replaced when the turbocharger coolant pipes are removed.

2. Install the EN-49940 remover (2) to the turbocharger coolant feed pipe (1) and the quick fitting connector as shown.
3. Compress the EN-49940 remover and remove the turbocharger coolant feed pipe direction of the arrow.

Fig. 35: Quick Fitting Connector And Seal Ring

4. Remove the quick fitting connector (2) and the seal ring (1).

Installation Procedure

Fig. 36: Quick Fitting Connector And Seal Ring

CAUTION: Refer to Fastener Caution

1. Install the NEW quick fitting connector (2) and a NEW quick fitting connector seal ring (1) to the turbocharger and tighten to 20 N.m (15 lb ft).

Fig. 37: Turbocharger Coolant Feed Pipe

2. Install the turbocharger coolant feed pipe (1) to the quick fitting connector (2) by pushing in direction of the arrow until it engages audible.
3. Install the turbocharger. Refer to Turbocharger Replacement .

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