- 1). Park your car on a level spot and let the engine cool completely. If you can see radiator coolant on the ground beneath your car, follow the leak to find out if it is coming from the hoses or the radiator itself.
- 2). Place the drain pan underneath the draincock for the radiator (this is located on the bottom of the radiator on the driver's side). Remove the radiator fill cap. Then, open the draincock by turning it counterclockwise and drain all the fluid from your system.
- 3). Replace the radiator hoses if you traced the leak back to a hose or connection. The type and shape of hose that you will need will be specific to your car's make and model. Once you have the correct replacement hose and have drained the system, remove the hose clamps on both ends of the old hose, pull the hose off and install the new one. Make sure the hose clamps are on securely.
- 4). Close the draincock after you have completed draining the system and add one bottle of Radiator Flush to your radiator and 1 gallon of coolant. Replace the filler cap and run the engine for 10 minutes. Drain the system again.
- 5
The actual work of flushing is done by the hose.
Put one end of a garden hose in the radiator (through the filler cap hole) and flush the engine with water until the water that is coming out of the draincock is absolutely clear. - 6). Refill the radiator with new coolant and replace the old filler cap with a new one.
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