Due to the radiator's position on the 1994 Ford Thunderbird, it's left vulnerable to damage from pebbles and road debris. Damage to the radiator can cause coolant to seep out, resulting in the cooling system being unable to perform its job as intended. Fortunately, there are a number of methods you can use to fix these leaks yourself. Small pinhole leaks and hairline cracks can be fully repaired using a stop-leak additive, which circulates through the cooling system and expands to fill any damaged areas. More serious damage can be filled in with a radiator epoxy.
Instructions
- 1
Open the hood and locate the coolant overflow reservoir. Remove the cap and pour in a bottle of stop-leak additive. Top off the coolant level with antifreeze, if necessary, and replace the cap. Start the engine and let it run for at least ten minutes to give the additive time to work. Check the source of the leak to see if it's still leaking. If so, a filler epoxy will be required to patch the hole.
2Mix an appropriate amount of radiator-sealing epoxy. Follow the product instructions for mixing directions. Due to the high temperature and pressure incurred in the cooling system, only use an epoxy product specifically designed for use on radiators.
3Apply the epoxy product to the radiator, pressing it completely into the damaged area and allowing it to overflow beyond the perimeter of damage. Apply the epoxy liberally, using more than the minimum amount required to fill in the area. Allow the epoxy to dry for the amount of time specified on the packaging.
4Top off the coolant reservoir and start the engine. Let it idle for several minutes, then return to confirm the radiator is no longer leaking.
