Skip the auto shop - Our mechanics make house calls

Q: My car is making a loud grinding noise when idle.

asked by on

It seems like the noise lessens or temporary goes away when I turn off the heat. But when I'm parked and car is on, the floor rattles. When I'm on the road it's gone. My engine light came on . I'm really concerned as I just bought the car. I also know there is a leak problem with the back tire
My car has an automatic transmission.

Hi there. Check the engine and transmission mounts for any looseness or damage. As the vehicle ages, the mounts tend to wear out causing the engine and transmission to vibrate the cab. When the heat is off, the squirrel cage to the heater could be also contributing to a vibration. For the leaking tire, air up the tire and spray the tire with soap and water. The soap water will bubble up when a leak is detected. Keep in mind, if there is a side wall or on the tread by the side wall of a tire leaking, then the tire must be replaced. If you need further assistance with a vibration in your car and a leaking tire, then seek out a professional, such as one from Your Mechanic, to help you.

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: How do you lock or unlock the seat belts?

Your car is equipped with combination lap and shoulder belts for every seating position (two in the front and three in the rear). While each seat has its own belt, they all work the same way. Here’s how to lock...

Q: Car radiator is not holding coolant

A simple coolant leak can turn into bigger problems. The source of the leak will need to be determined and repaired. Most of the time coolant leaks externally, but it can leak into the engine, or even into the transmission...

Q: When i drive over a dip in the road theres a vibration/grinding in the pedal and car.also when car leans right it does.

A possibility is the motor/transaxle mounts are worn or sagging and that causes misalignment of the CV axles accounting for the noise and vibration. However, that is just one possible scenario. Vibration under acceleration could also be due to an...

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...
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...
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...