Skip the auto shop - Our mechanics make house calls

Q: Loud banging from left valve cover, gets louder when accelerating.

asked by on

Loud banging noise from left valve cover. Gets louder as you accelerate. Does not sound like tapping.
My car has an automatic transmission.

A: Hi, thanks writing in. This may be a loose ...

Hi, thanks writing in. This may be a loose rocker arm or pushrod which would increase in intensity as the RPMs increase. I would suggest having this looked at immediately as this can cause major damage if continued to be driven like this. I recommend having one of our certified automotive technicians from YourMechanic come to your home or office to inspect, diagnose, and repair the issue.

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: Took my car in for a tune up and oil change. The next day the rpm's are running high, super loud, and running very hard. What can it be?

Check the throttle plate and position sensor on the engine. When the shop performed a tune-up they could have cleaned up the throttle plate and got the throttle position sensor wet. If the sensor is wet then the engine may...

Q: Grinding front drivers was told wheel bearing might be backwards only grinds when going straight not turning

This may be either dragging brake rotors or bad wheel bearings as either of these will cause this kind of grinding sound. I would recommend having an expert from YourMechanic come to your home to diagnose the grinding sound and...

Q: Exhaust smoke smells like gas or burning oil.

Hi there. The smoke coming out of your exhaust is most likely oil being burned through your engine. The oil gets into the cylinder by a few ways. The first way is for the oil to get by the oil...

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...
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...