Menu Close

Why is there a rattling noise coming from my exhaust?

Why is there a rattling noise coming from my exhaust?

If you hear rattling under the car it could mean that the exhaust system has become misaligned. If you can hear a loud metallic vibration, it usually means that something is touching the exhaust pipe or that a clamp, support bracket or mounting is loose. Hangers and brackets hold your exhaust in place.

When I press the gas pedal I hear rattling?

Some experts even call this rattling noise as ‘carbon rap’ and is caused by worn or sticking valves and hydraulic lifters. Carbon rap is caused by premature ignition of the air and fuel mixture inside the motor. It can also be caused by dirty oil and using the improper fuel octane required for your vehicle.

Why does my car sound like a rattling tin can?

If your rear window doesn’t read “Just Married” and you still hear a sound like tin cans tumbling from behind, your exhaust system may need a tune up. Your car’s exhaust system is made up of five pieces: the exhaust manifold, catalytic converter, resonators, muffler, and pipe.

Can I drive with a rattling exhaust?

This can be dangerous so contact a certified mechanic right away. Driving with a loud muffler is potentially dangerous. If your muffler is loud because of a hole, rust, or other defect, carbon monoxide may be getting into the cabin of your vehicle. Carbon monoxide can be dangerous to you and your passengers.

How much does it cost to fix an exhaust rattle?

It’s just a couple bolts and some sheet metal, but can become a headache. If you take your car to the shop, the parts will be closer to $150 and it should take about an hour of labor. The total bill should be about $300.

What is the most likely cause of a rattling sound coming from the underside of a vehicle?

If the rattling sound sounds like it is coming from underneath your vehicle, you likely are experiencing a problem with your exhaust system. Exhaust system problems include catalytic converter problems, muffler issues or corroded pipe, can sound like light rattling to rocks shaking beneath your car.

Can an exhaust leak cause a rattling noise?

Exhaust leaks cause a rattle sound as well, and you could have exhaust fumes coming into your car from a damaged pipe.

Why is my BMW making a rattling noise?

Rust and corrosion also cause the deterioration of the exhaust system itself, which can cause rattles. In instances like this, the muffler or tailpipe probably needs to be replaced. Sometimes, an exhaust system clamp gets loose, creating a rattle. Another cause of rattles under the car is a failing catalytic converter.

Can a catalytic converter make a rattling noise?

Rattling Noise – Once your catalytic converter becomes older or damaged from fuel mixtures, the honeycombs on the inside can begin to collapse and/or break apart which will cause a rattle to occur.

How do I know if my catalytic converter is rattling?

A catalytic converter rattle is a warning sign all is not well under your hold and car. If it’s caused by a loose heat shield, tighten the bolts….

  1. Reduced Engine Performance.
  2. Decreased Gas Mileage.
  3. Rattling Sound.
  4. Sulfur/Rotten Egg Smell from Exhaust.
  5. Illuminated Check Engine Light.
  6. Increased Emissions.
  7. Engine Misfires.

Can catalytic converters rattle?

A catalytic converter rattle is a warning sign all is not well under your hold and car. If it’s caused by a loose heat shield, tighten the bolts. Residue buildup rattle can be reduced using additives, cleaners, or high-octane fuel.

Why does my BMW make a rattling noise when accelerating?

If you hear a rattling noise when you are accelerating then this is definitely a friction problem. This could be a simple fix such as tightening or replacing your engines various belts. You can do a simple check by dropping some water on the belts and revving the engine.

How long will a rattling catalytic converter last?

Depending on driving habits, the environment, fuel, and maintenance, catalytic converters can easily last 10 years, 100,000 miles, or as long as the vehicle. The longer and hotter the converter runs, the better for it and the engine.