Skip the auto shop - Our mechanics make house calls

Q: Whenever I press on the gas there is a rattling in what sounds like the front half of the car.

asked by on

Whenever I press on the gas there was a rattling coming from or what I think is under the car but I am not 100% sure I just got a muffler put on three days ago and the sound did not exist before then.

My car has 96000 miles.
My car has an automatic transmission.

Loud metallic rattles are not uncommon as vehicles age. That the noise did not start until some exhaust repairs leads to the same spot. An exhaust heat shield. Some exhaust components have a heat shield welded to them. In other instances, the heat shield is bolted to the underside of the vehicle. These heat shields can be two-piece construction, like a clam shell. They are spot-welded is several locations. From age these spot welds can rust and break. The two pieces of the shield will then rattle together. Sometimes constantly and other times, only in certain gears or rpms. It may not necessarily be due to anything other than age and the parts being moved to install new components. Take it back to whoever installed the exhaust system and ask them to take a look underneath.

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!
  • Home
  • Questions
  • Whenever I press on the gas there is a rattling in what sounds like the front half of the car.

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: I hear a loud screeching noise when I take off

Hello there. Typically when a noise like this occurs it is due to a drive or serpentine belt that is loose or wearing out. It's also possible for pulley's that drive these belts are worn out and the squeaking is...

Q: Heavy white smoke from exhaust(2001 Nissan Frontier supercharged)will not start after.

Hi there: Usually heavy white smoke is a sign of serious internal engine damage such as worn out piston rings or worn cylinder head valve guides. It could also be an oil control valve that is damaged. Regardless, the white...

Q: Power steering fluid leak

Hello. If the power steering pump is leaking then it needs to be replaced. There are not seals that can be replaced on their own. I typically replace the pump and flush the fluid out. Once that is done the...

Related articles

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...