Skip the auto shop - Our mechanics make house calls

Q: Leaking clear but oily fluid when AC is running. It is located through the front end under the hood (by the aluminum cover insulation in front)

asked by on

The engine sounds labored when you put the gas. It has a sound like a vacuum leak in some sort of weird way. The inside of the vehicle smells funny when you put the air conditioner on. When the truck is parked it leaks a clear oily liquid and it starts to overheat with no leakage of coolant.

My car has 145000 miles.
My car has an automatic transmission.

A: Hello. From what you describe, it would app...

Hello. From what you describe, it would appear that your vehicle may possibly have a refrigerant leak in the AC system. I would carefully inspect the area where the fluid is coming from to see if you can figure out the source of the leak. It may be possible that a component, such as an AC line, or the AC condenser have developed a leak and are leaking refrigerant from the system.

This may also explain why the vehicle may be overheating. An AC leak can cause the condenser to overheat, which may explain both the engine overheating and the smell when the AC is activated. The condenser is located near the front of the vehicle and functions much like a radiator, with air passing through it, from a fan, or as the vehicle moves forward.

If the AC is still blowing cold air and there is a leak, then the system will likely being to blow warmer and warmer, until the air is no longer cold. I would recommend having a professional technician, such as one from YourMechanic, visit your location to diagnose the leak and proceed with the appropriate repairs.

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: Sloshing noise on startup

The first thing to do is check your coolant and see if you're low on fluid. When you are low on coolant, air bubbles are created and these air bubbles will slosh through the dash because the heater core is...

Q: I have a 1999 Ford F1 50 pickup truck and it will not start

Hello. A no crank condition can be caused by a few different things. If you have not done so already I would check to the battery to make sure that it is properly charged and producing enough power to start...

Q: AIR CONDITIONER IS BLOWING HOT AIR. Does this mean its the compressor necessarily?

Hello. I will be glad to help you with your Murano. A common cause of a "no cooling" condition is the system is low on refrigerant, however, inasmuch as your car is only 6 years old, if the refrigerant level...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...