Patch Your Radiator Up With A Cold Weld Epoxy

Over time, it is not unusual for a radiator to develop a leak. It can even happen to both low- and high-mileage vehicles. Fixing a leaking radiator can be expensive. However, if the leak is small, you can fix it by using a cold weld epoxy.

Drain The Radiator

Before you patch up your radiator, you need to drain all the coolant from your it. You will want to set up a shallow pan or bucket under your radiator to catch the coolant. You can drain your radiator by removing the cap and then loosening the drain valve inside of your radiator. If you are not sure where this is located, refer to your vehicle's owner manual.

Clean Off The Radiator

Next, in order for the epoxy to fix the leak, your radiator needs to be clean. Use a garden hose to clean off your radiator. You can also use some dish soap or car wash soap to clean off your radiator. Use a towel to dry off your radiator before you move onto the next step.

Locate the Leak

Locate the leak on your radiator. Once you have located the leak, open up the cold weld epoxy. Be sure to read all the directions on the package before you apply it. You may want to use gloves to apply the epoxy to the crack.

Let the epoxy cure or dry. The package should let you know how long this should take; however, on average, you should generally let it dry for at least two hours. If you really want the epoxy to set thoroughly, you should wait overnight to refill your radiator.

Refill The Radiator

Once the epoxy has dried, you can refill the radiator. Make sure you use the right coolant and add the correct amount of coolant and distilled water to your radiator. Some coolants you can just pour into your radiators, and others you need to mix with water. Make sure you read the coolant you purchased and follow the directions correctly. You will want to fill the radiator up to the fill line.

Be sure to screw the cap back onto the radiator. Do not put it on too tight. If the cap is on too tight, a vacuum will be created that could cause the patch you applied to give out. Just put the cap back on loosely at first, and in a couple days, you can tighten it up.

Check your radiator fluid levels every week for about a month to make sure that the epoxy patch held. If your radiator is still leaking fluid, you may have a bigger leak in your radiator than you can fix at home. In that case, you need to make an appointment with a local mechanic like Action Muffler Radiator & Brakes, and make sure you have enough coolant in your radiator in the meantime. 


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