Question about 1986 Mercury Grand Marquis

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Steaming from back of the engine. no heat. windshield fogs in the inside

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If you see steam at the back of the engine (in the engine compartment) you need to carefully look to find it's source (you can see it, I can't). It is possible that this steam is entering the vent and causing steam on the windshield. However the usual cause of this is a bad heater core. Bad core also will cause rug to become damp with antifreeze. No heat condition indicates that coolant level is low (likely as a result of steaming (leak) Don't drive with low coolant or severe engine damage will happen. Sometimes if leak is small you can add sealer to the system but this is temporary and problem must be repaired properly.

Posted on May 12, 2009

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If you are loosing coolant and you see water under the car after sitting you have a leak. The most likely area is the heater core as you are getting steam inside the car. If you smell anti freeze that is another confirming item. Check all the hoses and connections first before replacing the core. Good luck.

Posted on May 12, 2009

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