Question about 1999 Jeep Grand Cherokee

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Leaking outside underneath heater area what looks like water, but seems to be coming from inside firewall area. Could it be heater core and what can be done?

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If it looks like water, it's likely condensation from the air conditioner evaporator. If you are still using the A/C, that is supposed to happen. Coolant is green and not easily mis-identified.

Posted on Oct 08, 2010

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Posted on Jan 02, 2017

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My 1998 Crown Victoria had steamed the passenger side windshield, digital thermostat never indicated that the engine was hot, i smell antifreeze, water leaking inside passenger side by glove box and a


It sure sounds like the heater core, especially if you have water leaking inside the cabin. The two heater hoses only go from the engine to the firewall, and do not go into or through the firewall. They connect to the heater core right at the firewall.
Check carefully around the back side of the engine and the heater hoses, though. If a freeze plug is leaking, water will be dripping off the bottom of the engine. If it is leaking before the firewall, that would not be the heater core.

Nov 20, 2013 | 1998 Ford Crown Victoria

1 Answer

Have a 94 Buick century. Replaced thermostate. Running hot. Looks as tho is leaking underneath front near pump. And also in passenger floor board can't see the leak from inside. It's just alwa


Whenever I see a system which is leaking from more than one or two places, I do a head gasket check because that tells me that the system is experiencing above normal pressures. the wet floor is a heater core. whether it's a water pump or some other thing near it only you can tell. Actually it rarely happens, but the wet floor could be the hose where it meets the heater core at the firewall; again, only you will be able to tell the difference. if the hose connection looks dry, assume that it is the core itself.

Mar 03, 2013 | 1994 Buick Century

2 Answers

2000 Impala leaks coolant out hose in firewall


It sounds like you're looking at the heater core water lines. These connect to the heater core supply and return inlet and outlet pipes to bring hot coolant into the cabin for heat and windshield deicing.

The heater core is a mini radiator and operates on the exact same principles as the radiator does. The heater core is located behind the dash board on the passenger side. Look for a wet spot of antifreeze on the passenger side floor area - close to the firewall for an indication of a leaky heater core. If it is leaking, it will likely need to be replaced. This can be a pricey repair.

Good luck!

Jun 14, 2012 | 2000 Chevrolet Impala

2 Answers

I ALSO LIKE MANY OTHERS HAVE A 2002 TAURUS. HAD BEEN HAVING ISSUES OVER HEATING OR ALMOST. I NOTICED THAT THERE WAS AN EXCESSIVE AMOUNT OF WATER SPITTING FROM A PORT HOLE IN THE LOWER RIGHT FIREWALL WITH...


The heater core would be the suspect in this case as the only sources of water in that area are the heater core and AC evaporator. May only be leaking under high heat and presure, the new thermostat may have helped this for a while but if the pressure is too great and there is a hole then the water will find it. Could also be a hose dripping inside the firewall for the heater core.

Aug 22, 2011 | 2002 Ford Taurus

2 Answers

Windows fog up


Could be either a plugged vent tube in the heater box [ it's on the lower outside of the firewall ] letting the water puddle and then evaporate when heated, or a leaking heater core. If it's the heater core, you will smell coolant inside the car and may have a wet area on the passenger's side floor.

Apr 12, 2011 | 2003 Chevrolet Malibu

2 Answers

My van is over heating there is coolant and water in the radiator it started leaking underneath towards where the front passenger seat


The problem sounds like either the inlet or outlet hose to the heater core is cracked or split. Or the heater core itself is at fault. Need to inspect the hoses from engine to the firewall going to the heater core for damage. If no leak from the outside then problem will be on the inside under the dash. Hope this will help you.

May 31, 2010 | 1998 Dodge Caravan

2 Answers

Water leak passenger side in dodge caravan 2005 carpet soaked


look at the firewall on the engine side and you will see a small stub hose coming out on passenger side about even with the bottom of the heater box inside. that hose drains condensation from the ac...clear it out and you will have a dry floor. (unless heater core is leaking but you didn't mention any overheat or coolant loss so likely that's not a problem)

Jun 15, 2009 | 2003 Dodge Caravan

2 Answers

COOLANT LEAK CANT FIND


only thing that i know in that area is heater hoses.check those for looseness or cracks.

Mar 29, 2009 | 2001 Chevrolet Blazer

1 Answer

Heater core?


ok most cars you wont see a physical drip because the box is sealed to the firewall it will run out the drain hole the same as the ac if bad enough they will leak down the insulation right to the floor board running pure water will cause rust but rarly causes the heater core to blow what you arre looking for is the problem that started it all why she was adding water to begin with you didnt mention the type of car and motor so i really cant get into diagnostic procedures you can bypass the heater core on most cars if it is using that much water you propably have a blown head gasket that will make the heater core blow let me know the type of car and I will help you diagnose it further

Jun 19, 2008 | 1997 Pontiac Grand Am

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