2011 F150 5.0L "moaning/buzzing" sound
10-03-2011, 01:55 PM
#1
2011 F150 5.0L "moaning/buzzing" sound
My '11 5.0L with 3,300 miles has started up a new trick. When the truck reaches operating temperature it has started "moaning" under load. It is hard to describe the sound, and "moan or buzz" is the best I can come up with.
It will do this constantly under load, and will stop when idling in (or out of) gear. It will, from time to time, moan at idle.
The sound appears to come from the upper intake area, although *might* be coming from the drive belt area.
And to answer a few questions right off the bat...
1. totally stock, no mods.
2. A/C running/not running has no impact.
3. The electric fans are not running (not source of noise)
4. All connections appear tight.
The truck actually went to the body shop today. A few weeks ago I was rear ended by another F150 traveling between 50 - 60 MPH (ouch). The damage to my truck isn't too bad physically, but there are several electrical issues in-cab (airbags, sync, fuel gauge, productivity screen). It is possible that this was also caused by the collision (and the body shop/dealer is aware of this issue), but I thought I would ask if anyone has hear this sound before.
Here is an audio clip of the noise at idle: http://mypage.siu.edu/bskouby/F150/noise.wav
Under load this sound is constant and a bit louder (can hear it over the radio).
It will do this constantly under load, and will stop when idling in (or out of) gear. It will, from time to time, moan at idle.
The sound appears to come from the upper intake area, although *might* be coming from the drive belt area.
And to answer a few questions right off the bat...
1. totally stock, no mods.
2. A/C running/not running has no impact.
3. The electric fans are not running (not source of noise)
4. All connections appear tight.
The truck actually went to the body shop today. A few weeks ago I was rear ended by another F150 traveling between 50 - 60 MPH (ouch). The damage to my truck isn't too bad physically, but there are several electrical issues in-cab (airbags, sync, fuel gauge, productivity screen). It is possible that this was also caused by the collision (and the body shop/dealer is aware of this issue), but I thought I would ask if anyone has hear this sound before.
Here is an audio clip of the noise at idle: http://mypage.siu.edu/bskouby/F150/noise.wav
Under load this sound is constant and a bit louder (can hear it over the radio).
10-03-2011, 07:36 PM
#3
Senior Member
Hmmm i've never heard that before. Is it still under warranty even though it's been wrecked in the rear? Almost sounds like something is coming in contact with the belt. Maybe a pulley is loose somewhere caused from the impact.
10-03-2011, 08:51 PM
#5
I did check the drive belt system, tensioner, pullies, etc., and it all looked fine to the naked eye. I don't think there is anything broken there. When you listen to the sound, it really sounds like it is coming from the passenger side upper intake area. I'm wondering if something with the TiVCT system is screwed up from either the impact, or has simply failed. It still runs fine though, even with the noise.
When I find out I will post it here. I just wanted to see if anyone else had ran across this issue.
11-10-2011, 11:28 AM
#6
5.0L "moaning/buzzing" sound - FIXED
Well...the problem has been resolved. Apparently it was the water pump. My local dealer diagnosed the problem, ordered the part, installed it, and so far....all is good.
The problem grew steadily worse over the few weeks from when I first noticed it. So, I think it was a bearing problem on the water pump, and if it would have gone much longer would likely have caused a pump failure, or at least a leak.
The problem grew steadily worse over the few weeks from when I first noticed it. So, I think it was a bearing problem on the water pump, and if it would have gone much longer would likely have caused a pump failure, or at least a leak.
Last edited by bskouby; 11-10-2011 at 11:33 AM. Reason: update title
01-04-2012, 05:12 PM
#7
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Well...the problem has been resolved. Apparently it was the water pump. My local dealer diagnosed the problem, ordered the part, installed it, and so far....all is good.
The problem grew steadily worse over the few weeks from when I first noticed it. So, I think it was a bearing problem on the water pump, and if it would have gone much longer would likely have caused a pump failure, or at least a leak.
The problem grew steadily worse over the few weeks from when I first noticed it. So, I think it was a bearing problem on the water pump, and if it would have gone much longer would likely have caused a pump failure, or at least a leak.
Mine is making this sound now...I wonder if my knocking sound is related. I am having such a hard time with the dealer and Ford not wanting to fix my truck. Could you provide me with a copy of your work order? So I can show this to them? I would really appreciate it. Thanks, George
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01-08-2012, 06:31 PM
#9
My '11 5.0L with 3,300 miles has started up a new trick. When the truck reaches operating temperature it has started "moaning" under load. It is hard to describe the sound, and "moan or buzz" is the best I can come up with.
It will do this constantly under load, and will stop when idling in (or out of) gear. It will, from time to time, moan at idle.
The sound appears to come from the upper intake area, although *might* be coming from the drive belt area.
And to answer a few questions right off the bat...
1. totally stock, no mods.
2. A/C running/not running has no impact.
3. The electric fans are not running (not source of noise)
4. All connections appear tight.
The truck actually went to the body shop today. A few weeks ago I was rear ended by another F150 traveling between 50 - 60 MPH (ouch). The damage to my truck isn't too bad physically, but there are several electrical issues in-cab (airbags, sync, fuel gauge, productivity screen). It is possible that this was also caused by the collision (and the body shop/dealer is aware of this issue), but I thought I would ask if anyone has hear this sound before.
Here is an audio clip of the noise at idle: http://mypage.siu.edu/bskouby/F150/noise.wav
Under load this sound is constant and a bit louder (can hear it over the radio).
It will do this constantly under load, and will stop when idling in (or out of) gear. It will, from time to time, moan at idle.
The sound appears to come from the upper intake area, although *might* be coming from the drive belt area.
And to answer a few questions right off the bat...
1. totally stock, no mods.
2. A/C running/not running has no impact.
3. The electric fans are not running (not source of noise)
4. All connections appear tight.
The truck actually went to the body shop today. A few weeks ago I was rear ended by another F150 traveling between 50 - 60 MPH (ouch). The damage to my truck isn't too bad physically, but there are several electrical issues in-cab (airbags, sync, fuel gauge, productivity screen). It is possible that this was also caused by the collision (and the body shop/dealer is aware of this issue), but I thought I would ask if anyone has hear this sound before.
Here is an audio clip of the noise at idle: http://mypage.siu.edu/bskouby/F150/noise.wav
Under load this sound is constant and a bit louder (can hear it over the radio).
01-15-2012, 10:15 AM
#10
I have a 5.0 and have not had this problem. A friend of mine has one a few months newer and had the notice. We searched all over trying to figure out what it was and finally got on here and did some research that narrowed it down to the timing chain tensioner or water pump.
He took it into the dealer and after staying a couple of days, they figured it to be the water pump. I think there was a TSB for it already, but it seems that the service department did not have first hand knowledge of it previously.
He took it into the dealer and after staying a couple of days, they figured it to be the water pump. I think there was a TSB for it already, but it seems that the service department did not have first hand knowledge of it previously.