Skip the auto shop - Our mechanics make house calls

Q: My car is making a vibrating/grinding sound.

asked by on

My car has been making a vibrating/grinding sound for a few days now. The sound is similar to that of a diesel engine needing to shift gears but less intense. It happens when I accelerate but goes away at high enough RPMs. I don't know if it's the crankshaft or if the cold weather is warping something. Thanks for any help.

Josh K.

My car has 122000 miles.
My car has an automatic transmission.

A: Of course it's impossible to say what a...

Of course it's impossible to say what an engine noise might be without hearing it, but it sounds like you may be describing a spark knock. Spark knock is sometimes called pre-ignition and it occurs when the fuel in the engine ignites before it's supposed to. In some cases it can be helped by using premium gasoline, but it sounds like you may have a severe case that might mean something needs to be repaired. If you contact Your Mechanic about this, they can send a technician to your home or office who can check out your car and tell you what that noise really is.

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: Still overheating after replacing thermostat and radiator.

Hello, thanks for writing in. I suggest having the engine diagnosed by a mechanic to see if the cooling fans are working like they should, and if they have overheated, then see if engine head gasket is blown. I also...

Q: Failed smog test. OBD-II monitors not ready. Needs to be reset

Hello. If your monitors are showing not ready, then that is because the computer was recently reset or the battery may have been replaced. If either of these occurred, then there is a specific amount of driving that needs to...

Q: My Toyota Camry is knocking and ticking.

Ticking and knocking usually isn't a good thing. Does the speed of ticking increase with engine speed while sitting still? If so this means that it is coming from the engine. If the sound increase in speed on as the...

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...
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...
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...