How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask internal88 Your Own Question
internal88
internal88, Auto Mechanic
Category: Car
Satisfied Customers: 2518
Experience:  I've been working with automotive industry for almost 20 years. I also have an engineering background. Saving one car at a time.
63512786
Type Your Car Question Here...
internal88 is online now
A new question is answered every 9 seconds

gas pedal , there was a grinding noise..highway..my rear

Resolved Question:

Hello, I hit a bump the other day and later on I pressed on the gas pedal , there was a grinding noise. The next day as I was doing 60mph on the highway, I couldve sworn a flat circular object fell out of the car. I can see in my rear view mirror, that it was rolling like a wheel. What could it be? Thanks!
Submitted: 4 years ago.
Category: Car
Expert:  internal88 replied 4 years ago.

internal88 : Hello and welcome.
internal88 : I have seen a brake backing shield came off from a vehicle. It is black and circular.
Customer:

Thank you


 

Customer:

this one appeared silver and circular...


 

Customer:

when I looked in the rear view mirror, it looked like it was rolling like a wheel...


 

Customer:

was very flat.


 

internal88 : Hold on
Customer:

I continued driving the car fora bout 4 more hours..and the car performed well..


but not sure what the object was

Customer:

ok


 

internal88 : Do you have alloy wheels?
Customer:

yes


 

internal88 : Obviously you did not see anything obvious right?
Customer:

no....


rims were fine

internal88 : I thought about it.
Customer:

ok

internal88 : The weakest pint is the backing plate or the cat converter shield.
internal88 : They should be secured from the factory however I have seen them come off.
Customer:

ok


 

Customer:

does it come off when you accelerate the car?


 

internal88 : Possible but vey rare.
internal88 : Hold on
Customer:

ok


 

internal88 : Check my database
internal88 : Please hold
internal88 : You have a accent?
internal88 : 1.6 liters
Customer:

elantra


 

internal88 : Ok
internal88 : I see that there a shield that protects the header.
Customer:

of the brakes?


 

internal88 : It is silver rectangular shaped.
Customer:

ok


 

internal88 : There should be nothing loose underneath the car.
Customer:

so you think it's brake related?


 

internal88 : If you have time, I need you to go behind the wheel.
internal88 : And see if there is a backing plate.
Customer:

ok


 

internal88 : For the other heat shield you will have to slid under the car.
internal88 : It is right above the exhaust collectors.
Customer:

ok


 

internal88 : I don't think is from your car.
internal88 : But check out all the safety points.
Customer:

ok


 

internal88 : Along the front end.
Customer:

if it is the backing plate, would i be able to still operate the vehicle

internal88 : Like I said all the important components are bolted down.
Customer:

ok


 

internal88 : It is very rare it will come off, unless it was loose from the factory.
internal88 : If is the backing plate that would create a grinding noise.
Customer:

I see....

internal88 : Then evenly fall off
internal88 : And also this is the weakest components under the chassis.
Customer:

I see


 

internal88 : It is also called the disc brake dust shield.
Customer:

ok


got it

internal88 : Yes it is safe to drive without the back plate.
internal88 : However I would suggest you to inspect it.
Customer:

ok


 

internal88 : That is all I have for you.
Customer:

Thank you. It helped alot.


 

internal88 :

Please ACCEPT my Answer if I have helped you. This is how I get credit for my research. A BONUS is greatly appreciated! I only strive for Excellence, so if you have further questions please let me know. I will still help you after the acceptance.

internal88 and 4 other Car Specialists are ready to help you