Question about 1999 Ford Expedition

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Water leaking from heater core - 1999 Ford Expedition

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If there's a leak from the heater core, then you need to replace the bad heater core. But having a mechanic do the work costs several hundred dollars. You can work around the eventual replacement if you cannot afford a new one and need a temporary fix.

1. Locate where the leak is coming from, add a can of radiator stop-leak additive, such as BARS Leak Stop, to the radiator. These additives can patch a pinhole-sized hole in the heater core. You can purchase these additives at any auto supply store.

2. Run the engine for a few minutes to distribute the fluid throughout the system. Don't drive the car for any distance until you are sure this technique has fixed the problem.

3. Bypass the heater core if the additive doesn't do the trick. This method varies depending on the vehicle, but most systems are somewhat similar. Two small heater hoses are attached to the heater core, one going in and one going out. If the hose clamps are accessible, disconnect the hoses and then connect the hoses to each other with a 5/8-inch or 3/4-inch plastic hose connector or hose coupler. These can be purchased in a hose repair kit at auto supply stores.

4. If the hose clamps are not accessible, cut the hoses at the point of entry and connect them together with the hose connector or coupler.

Hope these info helps and have a great day!

Posted on Jul 01, 2009

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