Ecoboost Performance Forum

Ecoboost Performance => Troubleshooting, Maintenance, TSB Articles => Troubleshooting => Topic started by: Mml665 on October 07, 2020, 09:18:14 PM

Title: Rattling Noise when AC is on
Post by: Mml665 on October 07, 2020, 09:18:14 PM
I'm experiencing a rattling noise similar to a loose heat shield. I hear the noise intermittently when the AC is on. It is not a constant noise. Any of the forum members have any insight?
Title: Rattling Noise when AC is on
Post by: xartic1 on October 12, 2020, 07:46:28 AM
Quote from: Mml665 on October 07, 2020, 09:18:14 PM
I'm experiencing a rattling noise similar to a loose heat shield. I hear the noise intermittently when the AC is on. It is not a constant noise. Any of the forum members have any insight?
When I first bought my 14 Explorer Sport in June mine had this rattle noise you are experiencing. I ended up replacing both the tensioner and belt as I was unsure which it was and replacing the belt isn't nearly as easy as a normal longitudinal motor so I figured I'd do both.

I have noticed there are either 2 or 3 different alternator sizes for the Explorer and the belt sizes vary as well.
Title: Re: Rattling Noise when AC is on
Post by: jman on October 13, 2020, 04:13:36 PM
Rattling noises usually come from the cooling fans. First check if there is anything trapped in there, look for anything lose around it and finally, listen carefully if it is the fan itself.
Title: Re: Rattling Noise when AC is on
Post by: xartic1 on October 13, 2020, 05:59:30 PM
Quote from: jman on October 13, 2020, 04:13:36 PM
Rattling noises usually come from the cooling fans. First check if there is anything trapped in there, look for anything lose around it and finally, listen carefully if it is the fan itself.
OP should clarify if the noise is on a cold start with the AC on only. Mine was rattling regardless of the cooling fan on or off since the prior owner had the incorrect belt installed.
Title: Re: Rattling Noise when AC is on
Post by: Mml665 on November 06, 2020, 08:07:05 AM
Quote from: xartic1 on October 13, 2020, 05:59:30 PM
Quote from: jman on October 13, 2020, 04:13:36 PM
Rattling noises usually come from the cooling fans. First check if there is anything trapped in there, look for anything lose around it and finally, listen carefully if it is the fan itself.
OP should clarify if the noise is on a cold start with the AC on only. Mine was rattling regardless of the cooling fan on or off since the prior owner had the incorrect belt installed.
At first it was cold or warm start, with AC on, now it seems to happen with or without AC on. It is similar to heat shield rattle in sound
Title: Re: Rattling Noise when AC is on
Post by: Mml665 on December 28, 2021, 11:42:38 AM
Sooooo update long time coming, the noise was fixed by replacing the recently replaced belt tensioner and belt.
Title: Re: Rattling Noise when AC is on
Post by: Macgyver on December 28, 2021, 11:51:19 AM
Quote from: Mml665 on December 28, 2021, 11:42:38 AM
Sooooo update long time coming, the noise was fixed by replacing the recently replaced belt tensioner and belt.


Good to know. Thanks !!!
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