* Water Pump: While the water pump is usually more centrally located, a leak *could* drip down towards the passenger side. A failing water pump seal is a common culprit.
* Heater Core: This is a very likely culprit for a passenger-side leak. The heater core is located behind the dashboard, on the passenger side, and a leak would drip down onto the floor or under the vehicle near the passenger side. This often manifests as a sweet smell of antifreeze inside the cabin.
* Radiator: While less likely to drip *exclusively* passenger side, a lower radiator hose or radiator leak *could* cause a drip that migrates to that side, especially if the vehicle is on an incline.
* Hoses: Various hoses connected to the engine and radiator can crack, rot, or become loose, leading to leaks. Examine all hoses carefully. Pay close attention to hoses near the firewall on the passenger side.
* Thermostat Housing: A crack or leak in the thermostat housing can also cause antifreeze leakage.
* Engine Block Crack (rare but serious): A crack in the engine block itself is less common but possible and would require significant repair. This usually involves external staining of the antifreeze on the engine block near the passenger side.
Troubleshooting Steps:
1. Visual Inspection: Thoroughly inspect the engine bay, especially around the areas mentioned above. Look for wet spots, stains, or dripping antifreeze. Start the engine and let it run for a short period to see if you can pinpoint the source of the leak. (Be cautious of hot components).
2. Pressure Test: A radiator pressure test can help determine if there's a leak within the cooling system under pressure. This is best done by a mechanic.
3. Dye Test: Adding a dye to the cooling system can help pinpoint leaks that are hard to see. The dye glows under a UV light, making leaks easier to detect.
4. Professional Diagnosis: If you can't find the leak yourself, take your Windstar to a mechanic for a proper diagnosis. They have the tools and expertise to accurately identify the source of the problem and recommend the best course of action.
Don't ignore an antifreeze leak. Driving with a low coolant level can lead to overheating and serious engine damage.
