The clutch on my ac compresser is leaking out really thic...

Q: The clutch on my ac compresser is leaking out really thick black tar like stuff when it is spinning. What is it? And why is it doi

asked by on August 22, 2017

My clutch to to the ac compresser is spitting out really thick black tar like stuff out when it engages and spins. What is it? And why? I checked the the charge on the low port and it had way to much pressure in it.

My car has 200000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. A black goo coming from the air conditioning compressor is more commonly known as "black death". It occurs when the refrigerant in the air system breaks down and is no longer the chemical it was when it was put into the system. It can happen with old refrigerant or poor quality refrigerant that is not properly maintained. "Black death" can also occur when the compressor starts to wear down, and it can be amplified by bits of metal from the compressor getting into the refrigerant. It can cause a lot of issues with the system if it is allowed to continue on. You can attempt to flush the system and recharge it, but the black goo does cause issues with the components it contaminates. Expect there to be other issues, and consider yourself lucky if there is no further damage beyond the compressor. For help flushing and inspecting the AC system, contact our service department to schedule an appointment.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

My car changes gears while driving

It sounds like the transmission has delayed engagement. After the engine is started, how long do you wait until you put it in gear? As cars get older and racks up more miles, it never hurts to let the car...

My car is making a grinding noise when put in gear, and when i come to a stop, while my car is in gear, it starts to jerk

It is not clear if the stalling and the noise are connected. That is, you could have two separate issues. If the car makes noise when you select "drive", that suggests a torque converter or transmission issue. Check the fluid...

Brakes hard to press

It sounds like your brake booster is worn out. There is a diaphragm inside the booster that wears out and will not allow the booster to get enough vacuum to work properly. I would have a technician from YourMechanic come...

Related articles

How Long Does an AC Accumulator Last?
Your Your vehicle’s air conditioning system is a complex system of components, each of which plays an important role. However, not all the components will continue to work properly if they come into contact with moisture, and that is where...
How to Replace an Evaporator Temperature Sensor (Switch)
The air conditioning system has an evaporator temperature sensor that fails when there is no cold air or the air conditioning is inconsistent.
How to Get Hyundai Dealership Certified
Hyundai dealerships offer automotive technician jobs to mechanics who are certified through Professional Automotive Career Training and Global e-Campu