Jump to content
skoorb76

Mystery Noise

Recommended Posts

I have found several examples of my noise on the net, but nobody seems to have found the source.  I don't have an Edge, but a 2014 AWD 3.5 NA Flex... I have found a few Edges with the same noise so looking here.  Squeak/squeal/chirp from the engine/drive/axles/wheels, between 30 and 60 mph, intermittent mostly during the first 15 minutes of driving, for durations of less than a second up to 30-60 seconds of rhythmic squeaking.  Loosely correlated with vehicle speed, the rhythm slows down but the pitch is fairly constant.  Not related to engine rpm.  Anyone have an idea of what this noise is:

 

https://www.youtube.com/watch?v=vuU0RKduDOU

 

Thanks for your input folks

Edited by skoorb76
fix link

Share this post


Link to post
Share on other sites

I think I know.

 

I'll bet its your HVAC blower motor. My 09 MKX started that same sound, ignored it, went away, came back, went away, came back, went away. Always ignored it. Then it came back with vengeance. S.Q.U.E.E.KKKKKKK. 

 

Pulled the blower and motor combo (about two minutes) and shot some lub into the bearings. Been two years, still quiet.

Share this post


Link to post
Share on other sites

Thanks, I double checked this... pulled the blower and took it apart, cleaned the brush area (quite dirty), squirted some CLP on the bearings and put back together.  Caught the noise again after, it is definitely not blower motor, definitely outside the car and coming from the front.  Chattering, chirping, rhythmic squeak from under the front of the car.

 

Honestly I am about 80% sure it is the electric fan.  The fan does make a chirp when spinning down.  It doesn't seem quite loud enough to be able to break into this, which seems quite loud.  A bystander would hear it if they were in their yard I think, and probably think I need a belt or brakes.

 

I just can't piece together the whole story of if it is the fan, how does it chirp so intermittently, only at vehicle speed and mostly when warming up?  What is the logic of the fan; from what I can tell it is two speeds.  Is it ever OFF completely?  I could see the wind being a factor influencing the noise of a fan bearing at a low fan speed of if the fan were off.

 

Thoughts?  (Thanks so much for the reply)

 

Share this post


Link to post
Share on other sites

Bumping for video link (my car):
https://youtu.be/jfuDZYjshwk

 

Could it be the fan?  It does have a chirp, but it doesn't make the same sound.  Could this plus the airflow through the fan cause the noise?  
https://youtu.be/r1iCZrZVE34

 

Any input appreciated, thanks!

Share this post


Link to post
Share on other sites
On 5/23/2021 at 7:05 PM, skoorb76 said:

Thoughts?  (Thanks so much for the reply)

Any possibility its the water pump or wheel bearing? Water pump or coolant fan will squeal at idle. Wheel bearing or CV joint only underway. 

 

May have to take it in and run while on hoist to isolate. Whatever it is, is going to get worst in time. 

Share this post


Link to post
Share on other sites
23 hours ago, skoorb76 said:

https://youtu.be/r1iCZrZVE34

Any input appreciated, thanks!

 

Think I'd suspect wheel bearing or brake problem.

Edited by enigma-2

Share this post


Link to post
Share on other sites

For anyone who is interested, my trip to the dealer resulted in a new PTU, water pump, and left front axle seal.  None of these things were done expressly for the noise (PTU had been seeping for a little while, axle seal had a leak, and timing cover had a leak).  

For the first few trips to town and back in the car I have not heard the noise yet... so perhaps any of those things, or the process of taking a lot of stuff apart and putting it back together, has fixed it.  Still TBD on that due to the intermittent nature and the limited number of opportunities thus far.

  • Like 2

Share this post


Link to post
Share on other sites

That sounded expensive. Hopefully they found it.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×