Skip the auto shop - Our mechanics make house calls

Q: Sounds like something is loose

asked by on

I had my brake pads replaced and now there is a noise as if something is loose, or touching a moving part. I'm thinking it might be the heat shields, which are rusting away. The faster I go, the higher in pitch the sound gets. I also smelled a hot, burning smell from the interior vents when bringing in air from the outside. I thought it might have been the oil, so I added some, though I am not sure what the problem is.

If this all occurred right after the brakes were done, then it may be a backing plate hitting the rotor. This will cause the noise and can also cause some odor. It may also be a failing bearing which can cause the same thing. The odor can also come from new brake pads and rotors if they have not been broken in yet as there is a coating on them that will cause this. If it has been a while and it smells like oil then you may have oil getting on the exhaust. This will need to be diagnosed by getting under the vehicle to find the leak. Most of the time the leak on this engine comes from the valve cover seal. If you don’t plan on doing this yourself, consider YourMechanic, as a certified mechanic can come to your home or office to determine what is causing the smell and have this issue resolved accordingly.

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: My engine is vibrating and making a knocking sound at idle, which grows intensely when I accelerate but it all goes away at times

This seems to be a torque converter issue. The bolts are probably loose between the converter and the flex plate. To get to the torque converter bolts, you will need to remove the starter from the engine and then you...

Q: Small leak in emissions

You will need to have an EVAP smoke test performed to locate where the system is leaking before replacing anything. It could be a stuck valve, broken hose, or a gas cap that is not sealing the system. Without knowing...

Q: Going through a lot of brake pads on Mazda CX-5

Hello, noisy brake are probably the number one complaint that exists. Mazda has issued two Technical Service Bulletins for brake noise, TSB 04-004/14 for brake noise and TSB 04-003/14 for rear brake noise with uneven pad wear. If you have...

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...
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...
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.