Skip the auto shop - Our mechanics make house calls

Q: Exhaust sound

asked by on

I am noticing an odd very low pitch sound that sounds like it's coming from the mufflers. I recently replaced the gaskets that seal the exhaust pipes to the headers. I went with a copper gasket and it didn't seal quite right I could feel a leak when the car is running. Is it possible for this leak to resonate in the muffler causing this low sound? Or what symptoms can occur if there is an exhaust leak at this location? The header gaskets are new and completely sealed its only the connection point below that is leaking.
My car has an automatic transmission.

A: The leak at the header flange before the mu...

The leak at the header flange before the muffler can cause different types of sounds at different RPM’s of the engine - kind of like a music horn or flute. As air is blown past a hole, it will make a sound, and depending on the size of the hole and amount of air blowing across the hole, the sound will change. You can try removing the gasket and adding high temperature muffler sealer paste to the gasket before installing it. If you need help with this repair, a technician from YourMechanic can come to your home or office to diagnose the noise and help you resolve 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: Cant figure out what is wrong.

This sounds like your charging system is not working. Your battery is dead and the charging system cannot keep the engine running. Check to make sure the alternator belt is still on and all electrical connections are fully connected to...

Q: My car wont start and my trunk won't open

Hi there. Your issue of your car not wanting to start sounds more like a dead battery and will need to be replaced. The reason for this is because of you not being able to operate your windows or even...

Q: brake booster and master cylinder

Your first step is to verify that the parts you purchased are EXACTLY like the ones you removed. It is possible to have a a similar component fit but have the wrong clearance for the brake pedal pushrod. If they...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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 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.