Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2012SONIC L4-1.8LREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTCOOLING SYSTEMSERVICE AND REPAIRCOOLANT SYSTEM FLUSHING
2012 Chevrolet Sonic L4-1.8L
Coolant System Flushing
2012 Chevrolet Sonic L4-1.8LSECTION Coolant System Flushing
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 Cooling System Draining and Filling.
3. Fill the cooling system with clean drinkable water. Refer to Cooling System Draining and Filling 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 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 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 Cooling System Draining and Filling.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.