ous. How? Well, to begin with, water in excess of 200 degrees flows through the Mercury heater core whenever you have the interior heat turned on. That should be enough to grab your attention. A leak in the Mercury heater core allows that boiling water and antifreeze mix to drip-or flow-onto the various components under your dash, or onto your shoes and pants. Most Mercury heater core leaks aren't that dramatic though, and that leads us to the other dangerous component of a bad Mercury heater core: rust. Since the coolant that flows through your Mercury heater core is roughly 50% water, any that leaks out and pools on the floorboards will begin to eat away at the sheetmetal. Since a Mercury heater core usually starts out very small, coolant could have been collecting under your carpet for months before you even notice there's a problem. So, the first rule of thumb is to pay attention to your car. If you notice that your coolant level is consistently low, find out where it's going. If you discover a Mercury heater core problem, either by accident or on purpose, get it repaired immediately. After all, engine coolant is poisonous if ingested. If you have pets or children in the car, a leaky Mercury heater core can turn into a fatal situation. There's no excuse for not fixing the problem either, especially not when you consider our everyday discount price on every Mercury heater core we carry. Since it's in stock and ready to send to your front door, we can provide you with a premium Mercury heater core so you can get down to the business of drying out your interior!