Engine Cooling System: Maintenance Chevrolet Cruze I facelift

Draining Procedure

1. Unscrew the surge tank cap to remove vacuum when draining coolant.
2. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-543791-S28986728202013042400000) .
3. Place a container under the radiator drain.
4. Unscrew the radiator drain plug (1) until coolant flows out the radiator drain.
5. Follow the appropriate procedure based on the condition of the coolant: Normal in appearance-Follow the filling procedure. Discolored-Follow the flush procedure. Refer to «Coolant System Flushing»(ref-543824-S05348298342013042400000) .

Vac-N-Fill Procedure

1. Close the radiator drain cock by hand.
2. Install GE-42401-2 adapter into the surge tank fill neck.
3. Install GE-42401-3 adapter to the surge tank fill neck.
4. Attach the Vac N Fill cap to the GE-42401-3 adapter.
5. Attach the vacuum gauge assembly to the Vac N Fill cap.
6. Attach the fill hose to the barb fitting on the vacuum gauge assembly. Ensure that the valve is closed.
7. Pour the coolant mixture into the graduated reservoir.
8. Place the fill hose in the graduated reservoir.
9. Install the vacuum tank on the graduated reservoir with the fill hose routed through the cut-out area in the vacuum tank.
10. Attach the venturi assembly to the vacuum tank.
11. Attach a shop air hose to the venturi assembly. Ensure the valve on the venturi assembly is closed.
12. Attach the vacuum hose to the vacuum gauge assembly and the vacuum tank.
13. Open the valve on the venturi assembly. The vacuum gauge will begin to rise and a hissing noise will be present.
14. Continue to draw vacuum until the needle stops rising. This should be 610-660 mm Hg (24-26 in Hg). Cooling hoses may start to collapse. This is normal due to vacuum draw.
15. To aid in the fill process, position the graduated reservoir above the coolant fill port.
16. Slowly open the valve on the vacuum gauge assembly. When the coolant reaches the top of the fill hose, close the valve. This will eliminate air from the fill hose.
17. Close the valve on the venturi assembly.
18. If there is a suspected leak in the cooling system, allow the system to stabilize under vacuum and monitor for vacuum loss. If vacuum loss is observed, refer to «Loss of Coolant»(ref-543824-S27973101512013042400000) .
19. Open the valve on the vacuum gauge assembly. The vacuum gauge will drop as coolant is drawn into the system.
20. Once the vacuum gauge reaches zero, close the valve on the vacuum gauge assembly and repeat steps 10-16.
21. Detach the Vac N Fill cap from the vehicle's coolant fill port.
22. Add coolant to the system as necessary.
23. Inspect the concentration of the coolant mixture, using the GE-26568 tester.
24. Detach the vacuum hose from the vacuum gauge assembly.
25. Attach the extraction hose to the vacuum hose.
26. Open the valve on the venturi assembly to start a vacuum draw.
27. Use the extraction hose to draw out coolant to the proper level.
28. The vacuum tank has a drain valve on the bottom of the tank. Open the valve to drain coolant from the vacuum tank into a suitable container for disposal.

1. Unscrew the surge tank cap to remove vacuum when draining coolant.
2. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-543791-S28986728202013042400000) .
3. Place a container under the radiator drain.
4. Unscrew the radiator drain plug (1) until coolant flows out the radiator drain.
5. Follow the appropriate procedure based on the condition of the coolant: Normal in appearance-Follow the filling procedure. Discolored-Follow the flush procedure. Refer to «Coolant System Flushing»(ref-543824-S05348298342013042400000) .

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 park brake.
2. Drain the coolant. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-543824-S32327120202013042400000) , «Cooling System Draining and Filling (GE-47716 Fill)»(ref-543824-S13480839732013042400000) .
3. Fill the coolant system with clean drinkable water. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-543824-S32327120202013042400000) , «Cooling System Draining and Filling (GE-47716 Fill)»(ref-543824-S13480839732013042400000) .
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 (Static Fill)»(ref-543824-S32327120202013042400000) , «Cooling System Draining and Filling (GE-47716 Fill)»(ref-543824-S13480839732013042400000) .
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 (Static Fill)»(ref-543824-S32327120202013042400000) , «Cooling System Draining and Filling (GE-47716 Fill)»(ref-543824-S13480839732013042400000) .
9. Add 3.8 liters (1.0 gal) of concentrated antifreeze since there will be some water in the system.
10. Add a mixture of 50/50 antifreeze and clean drinkable water until the level stabilizes at the weld seam on the surge tank. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-543824-S32327120202013042400000) , «Cooling System Draining and Filling (GE-47716 Fill)»(ref-543824-S13480839732013042400000) .