Skip the auto shop - Our mechanics make house calls

Q: Truck screaming

asked by on

My truck started screaming and I can hear a light knocking noise. Next the air conditioner went out, followed by oil leaking from underneath the truck. It still starts and drives.

A: Hello. It sounds like your AC compressor ma...

Hello. It sounds like your AC compressor may have failed. If the compressor fails internally it will lock up and cause the belt to squeal and make this noise. The compressor can also release oil when it fails. I would start by checking to see if the belt is still on the engine. If it is, then I would remove it and try spinning the compressor by hand to see if it moves. If it does not, then it needs to be replaced. If you are going to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your truck's noise and air conditioning issue so that proper repairs can be made.

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・Save up to 30%

Get a quote

What others are asking

Q: Hesitation, sputtering and check engine light flickering

The problems you are having may be the electrical harness intermittently loosing contact with the engine control module (ECM). The ECM may be loosing power intermittently from the main power supply. This is not a common issue; a qualified mechanic...

Q: What would cause the clutch on an ac compressor to continue to go bad after being replaced three times?

The compressor clutch relay on these vehicles are a known cause of sticking on the compressor clutch and overheating the A/C compressor clutch coil. Replace the A/C relay to see if it cures the clutch going bad the next time...

Q: Oil leaking from car.

We need to determine in what area of the car the oil leak is coming from. If it's in front of the motor it could be a front main seal or camshaft seal. If it's near the rear of the...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.