Where Does The Overflow Hose Connect?

Where Does The Overflow Hose Connect? An overflow hose connects to the radiator below the cap and the reservoir tank to store overflow of coolant. As pressures in the cooling system increase due to coolant temperatures, a valve on the radiator cap permits coolant back into the reservoir to help ease the build-up of pressure

Can I Just Add Coolant Without Draining?

Can I Just Add Coolant Without Draining? Can I just add coolant without draining? You can add the coolant without flushing out the old. However, with time, the older coolant becomes acidic. This can cause corrosion, and afterward, can cause defects in the cooling system. Its recommended by most manufacturers that you replace the coolant