Reasons to flush your Windstar's radiator:
* Overheating: If your engine is overheating, a clogged radiator is a strong suspect. This is an emergency situation; don't drive the vehicle until the cause is diagnosed and fixed.
* Low coolant level: Continuously needing to top off coolant suggests a leak *or* that the coolant isn't circulating properly due to a clogged system.
* Rusty or brown coolant: This indicates corrosion within the cooling system. Rust particles can clog the radiator and other components.
* Sluggish heater: A poorly circulating coolant can result in a weak or ineffective heater.
* Preventive maintenance: Even without noticeable problems, a preventative radiator flush every 2-3 years or 30,000-60,000 miles is a good idea, depending on your driving conditions (severe conditions like frequent short trips or towing necessitate more frequent flushes). Consult your owner's manual for specific recommendations.
Important Note: Flushing the radiator is a somewhat involved process. If you're not comfortable working on your car, it's best to take it to a mechanic. Improper flushing can damage your engine.
