How to Fix a Radiator

If your pockets are empty and so is the fluid level in your radiator, you may need to use some remedies of your own. You can do the repair yourself until you can afford a professional replacement. If the problem is minor, you can fix your car radiator easily. Read on to learn more.

Instructions

1

Find the origination of the leak by looking for its path. You may not need to fix the car radiator; the leak may come from one of the hoses instead. To check, open the hood and allow the engine to run until it's warm. You will see the leak immediately if it's in the hose. Replace the hose, which is relatively inexpensive to fix.

2

Check around the radiator cap for leaks. If there's liquid present, you may need a new cap or additional gasket.

3

Patch the leak on the outside, if the radiator is leaking at the seam. Use a metal patching product, usually a putty-like product that hardens overnight. Put the putty on the leaky seam, work it in, allow it to harden and retest. This should temporarily fix your radiator.

4

Use a leak stop additive that can be used with antifreeze for an easy fix. Simply follow the manufacturer's directions. Most of the products require you to add the stop leak and drive until the engine is warm.

5

Drain the radiator if you use an additive that can't be mixed with coolant. Flush the radiator with plain water and fill with water. Mix in the additive and drive about 80 miles to allow it to work. Drain the radiator again and let it dry out. Refill with coolant, and the leak should be sealed.

6

Glue the overfill bottle if the leak stems from a hole or crack in it. Use an epoxy made for plastic to fill any holes.