Chevrolet Sonic Repair Manual: 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.
- Apply the parking brake.
- Drain the coolant. Refer to Cooling System Draining and Filling.
- Fill the cooling system with clean drinkable water. Refer to Cooling System Draining and Filling.
- Start the engine and run at 2,000 RPM until the thermostat opens.
- Turn OFF the engine.
- Drain the coolant system. Refer to Cooling System Draining and Filling.
- Repeat the above procedure until the water from the coolant system is colorless.
- Drain the coolant system. Refer to Cooling System Draining and Filling.
- Repeat the above procedure until the water from the coolant system is colorless. Refer to Cooling System Draining and Filling.
Information
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Cooling System Description and Operation
Cooling System
The cooling system maintains the engine operating temperature at the efficient
level under any speed and operating condition. When the engine is cold, the
cooling system ...
Other materials:
Starter Switch Check
Warning
When you are doing this inspection, the vehicle could move suddenly. If the
vehicle moves, you or others could be injured.
1. Before starting this check, be sure there is enough room around the vehicle.
2. Apply both the parking brake and the regular brake.
Do not use the accelerator p ...
Rear Disc Brake Mounting and Hardware Inspection
Warning: Refer to Brake Dust Warning.
Caution: Support the brake caliper with heavy mechanic wire, or
equivalent, whenever it is separated from its mount and the hydraulic flexible
brake hose is still connected. Failure to support the caliper in this manner
will cause the f ...
Tread Wear Indicators Description
The original equipment tires have tread wear indicators that show when you should
replace the tires.
The location of these indicators are at 60 degree intervals around the outer
diameter of the tire. The indicators appear as a 6 mm (0.25 in) wide band when the
tire trea ...
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