Skip the auto shop - Our mechanics make house calls

Q: Overheating and leaking from around the heater core

asked by on

My Pathfinder is overheating. Its is leaking from the back by the heater core, but I cannot tell from where exactly.

If your engine is leaking coolant, this is the reason for the overheating. The cooing system requires a specific level of fluid in order to function properly. If the fluid is leaking by the firewall near the heater core, the heater core may have a crack in one of the tubes that the hoses connect to or the hoses themselves could be leaking. I would recommend having a professional perform a cooling system pressure test on your vehicle to determine where the leak is coming from. Once this has been found, repair the problem as soon as possible to prevent engine damage due to overheating.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Exhaust pipe oil leak

The oil pan may appear wet, but the leak may be running down from a higher place on the engine. The valve cover gaskets or camshaft seals may also be leaking down. Washing down the engine and adding U/V dye...

Q: Exhaust makes putt putt noise and vibrates car.

This may be a result of a faulty oxygen sensor. As you may know the oxygen sensors which are part of your emissions system read exhaust gases to determine whether or not the appropriate amount of oxygen is present in...

Q: Passenger's side window not working.

Not only is being unable to roll down your Tahoe’s window a frustrating situation, it is also a safety concern too.If you are attempting to roll down your vehicle window through its’ electric button and either nothing happens or you...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...