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  #37  
Old 06-03-2011, 10:24 AM
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Re: V6 High Pitched Sound

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Originally Posted by krpatrick View Post
... This brings up an interesting question. The noise is so high-pitched, is it possible there are people that don't have the hearing range to hear it?...
It could be, but since I cannot hear it on my own vehicle, I'm not sure. I do fall into the category of people with poor high frequency hearing. But no passengers have ever remarked on such a sound either.

Good luck with it.
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  #38  
Old 06-03-2011, 11:03 AM
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Re: V6 High Pitched Sound

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Originally Posted by krpatrick View Post
...The noise is so high-pitched, is it possible there are people that don't have the hearing range to hear it?...
It is definitely possible. We have a coworker who hears high-pitched sound coming from CRT TV in our room even when sound is off. Nobody else can hear it. He is 24 and the rest of us is are 40-45. We did blind test with him and he was able to tell correctly TV was on 9 times out of 10 without seeing it.
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  #39  
Old 06-08-2011, 10:13 AM
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Re: V6 High Pitched Sound

I met with the shop foreman of my dealer's service department yesterday afternoon. He asked if I could reproduce the noise while we were sitting in the vehicle in the parking lot. So, I revved up the engine to the appropriate RPM range (it's amazingly hard to hold the engine at a steady RPM while sitting still) and, thankfully, the noise was very evident. One advantage of doing it that way was no road noise, so we were able to hear the A/C compressor cycling on and off. He noted that the noise occurred right after the compressor cycled on. He even had an idea of where it might be coming from - he mentioned a valve or orifice that the refrigerant passes through when converting from a liquid to a gas. He said that he had never heard an A/C system make that noise and agreed that it shouldn't be doing it. His next step is to contact Chrysler to see if they know about the problem and to get further direction from them. It will be interesting to see if he gets the same response reported by jonboverland (it's a known issue with no fix). I'll let you all know as soon as I hear something.
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  #40  
Old 06-08-2011, 03:17 PM
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Re: V6 High Pitched Sound

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Originally Posted by krpatrick View Post
I met with the shop foreman of my dealer's service department yesterday afternoon. He asked if I could reproduce the noise while we were sitting in the vehicle in the parking lot. So, I revved up the engine to the appropriate RPM range (it's amazingly hard to hold the engine at a steady RPM while sitting still) and, thankfully, the noise was very evident. One advantage of doing it that way was no road noise, so we were able to hear the A/C compressor cycling on and off. He noted that the noise occurred right after the compressor cycled on. He even had an idea of where it might be coming from - he mentioned a valve or orifice that the refrigerant passes through when converting from a liquid to a gas. He said that he had never heard an A/C system make that noise and agreed that it shouldn't be doing it. His next step is to contact Chrysler to see if they know about the problem and to get further direction from them. It will be interesting to see if he gets the same response reported by jonboverland (it's a known issue with no fix). I'll let you all know as soon as I hear something.
I wish you the best of luck krpatrick and hope they get it resolved. Once you hear that noise, it won't get out of your head! Please let us know the outcome.
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  #41  
Old 06-09-2011, 05:23 PM
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Re: V6 High Pitched Sound

I have this noise. Noticed it for the first time a week ago when I had to drive 240 miles with AC on. It doesn't drive me crazy but it is somewhat annoying. It is very quiet and high-pitched and when radio is on I don't hear it at all.
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  #42  
Old 06-16-2011, 07:12 PM
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Re: V6 High Pitched Sound

Hello all. First of all, thank you for taking the time to post about this issue. Your posts have been a great help to me. I've been dealing with it since purchasing my 2011 GC in Oct 2010. I initially felt it was an air intake issue with the V6, and felt it might just go away as the engine found it's "groove". This was not the case, and in early May 2011 I took it in for an oil change and to fix the sound issue. I hadn't yet found this message board at the time. I described the sound as if you were listening to music and the guitar would feedback every fifteen or so seconds. The dealership (Orlando Chrysler Dodge Jeep) was befuddled much in the way several of you state having experienced. They of course did not hear the sound after inspection. I then researched online further and discovered your posts here. I printed the posts and took them to the dealer. They inspected the vehicle and again found no noise. I went back directly and had the tech ride with me. Thirty seconds on the road, I pointed it out and he confirmed it. His assessment - the AC valve some of you have also discovered to be the issue. He contacted Chrysler who instructed him to replace a part that they sent. A week later I returned and had the part replaced. I was called the next day and was told the sound was gone. No less than one mile drive away from the dealership the noise was heard. I called the dealership and the service person I was dealing with told me there was nothing more they could do. I called his supervisor and then the GM of the dealership. I received an invite to return the vehicle for another check. I also took it upon myself to record the issue. I created a short video depicting the issue clearly. I returned the vehicle with the dvd in hand. Later in the day the Service Manager called me and said the technician called Chrysler and reported the problem but that was all the dealership would do. My latest service receipt states this, "Roadtest and can hear a faint sound coming from right side at times. No abnormal problems found A/C system working as designed normal gas pressure noise through evaparator coil. No further repairs at this time." I assured the Service Manager that the sound might be faint to someone who drove the car for ten minutes but certainly not to owners like me or the several of you who own and drive the car daily. I have begun the lemon law process. I will not stand for this. I certainly will never be back to Orlando Chrysler Dodge Jeep. Even if the car is repaired I'll have it serviced at the Honda dealership across the street from Jeep. Much luck to us all...
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  #43  
Old 06-17-2011, 09:12 AM
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Re: V6 High Pitched Sound

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Originally Posted by TylerC View Post
Hello all. First of all, thank you for taking the time to post about this issue. Your posts have been a great help to me. I've been dealing with it since purchasing my 2011 GC in Oct 2010. I initially felt it was an air intake issue with the V6, and felt it might just go away as the engine found it's "groove". This was not the case, and in early May 2011 I took it in for an oil change and to fix the sound issue. I hadn't yet found this message board at the time. I described the sound as if you were listening to music and the guitar would feedback every fifteen or so seconds. The dealership (Orlando Chrysler Dodge Jeep) was befuddled much in the way several of you state having experienced. They of course did not hear the sound after inspection. I then researched online further and discovered your posts here. I printed the posts and took them to the dealer. They inspected the vehicle and again found no noise. I went back directly and had the tech ride with me. Thirty seconds on the road, I pointed it out and he confirmed it. His assessment - the AC valve some of you have also discovered to be the issue. He contacted Chrysler who instructed him to replace a part that they sent. A week later I returned and had the part replaced. I was called the next day and was told the sound was gone. No less than one mile drive away from the dealership the noise was heard. I called the dealership and the service person I was dealing with told me there was nothing more they could do. I called his supervisor and then the GM of the dealership. I received an invite to return the vehicle for another check. I also took it upon myself to record the issue. I created a short video depicting the issue clearly. I returned the vehicle with the dvd in hand. Later in the day the Service Manager called me and said the technician called Chrysler and reported the problem but that was all the dealership would do. My latest service receipt states this, "Roadtest and can hear a faint sound coming from right side at times. No abnormal problems found A/C system working as designed normal gas pressure noise through evaparator coil. No further repairs at this time." I assured the Service Manager that the sound might be faint to someone who drove the car for ten minutes but certainly not to owners like me or the several of you who own and drive the car daily. I have begun the lemon law process. I will not stand for this. I certainly will never be back to Orlando Chrysler Dodge Jeep. Even if the car is repaired I'll have it serviced at the Honda dealership across the street from Jeep. Much luck to us all...
Hi TylerC, I feel your pain. After numerous trips to Jeep dealership, the only advice I received to avoid this issue was blast the AC, listen to the radio louder, and drive without AC, which cannot be done in Texas.

Not being satisfied with the answer Chrysler gave me, which was the same one they gave you, I traded-in my Overland just over a month ago after only 6 months of ownership. I initially investigated pursuing the Lemon Law, but that process was too long and required more effort than simply trading in my vehicle. For a comparison, I was able to trade it in for $33,500, (V6 Overland with running boards, 4600 miles). This worked out great because I saved about $3,000 on taxes for the new vehichle I bought. (taxes are only applied on the difference between the trade-in and new vehicle price, something I was not aware of).

Anyway, just wanted to say I feel your frustration, and to consider trading in your vehicle instead of Lemon Law. That was very cathartic for me. Best of luck!
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  #44  
Old 06-17-2011, 09:35 AM
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Re: V6 High Pitched Sound

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Originally Posted by jonboverland View Post
Not being satisfied with the answer Chrysler gave me, which was the same one they gave you, I traded-in my Overland just over a month ago after only 6 months of ownership. I initially investigated pursuing the Lemon Law, but that process was too long and required more effort than simply trading in my vehicle. For a comparison, I was able to trade it in for $33,500, (V6 Overland with running boards, 4600 miles). This worked out great because I saved about $3,000 on taxes for the new vehichle I bought. (taxes are only applied on the difference between the trade-in and new vehicle price, something I was not aware of).
What new vehicle did you get, and other than the noise issue how does it compare to the Overland you traded in?
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  #45  
Old 06-17-2011, 10:11 AM
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Re: V6 High Pitched Sound

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Originally Posted by Lingohocken View Post
What new vehicle did you get, and other than the noise issue how does it compare to the Overland you traded in?
I actually bought used from a dealership, new to me. I bought a 2008 Porsche Cayenne with 37,000 miles on it. It was a few thousand more than what I originally paid for a new Overland, but the price difference has been worth it. It had the factory warranty as well as an extended Certified Pre-own warranty that will carry me until 2013, plus the benefits and service that Porsche delivers, including complemetary loaner cars with no questions asked.

I drove many other vehicles before purchasing it, because I did not want to be in the same boat as with Chrylser. Other than the Porsche, the other vehicle I really liked was the Acura MDX, and its base model costs about as much as an Overland. Acura also has free loaner cars.

I doubt I will ever purchase another 'top of the line' vehicle, such as an Overland, from a non-luxury company. I know that probably sounds like I'm being picky or snobbish, but I paid too much for a premium vehicle to not receive premium service.

If you are looking for a new vehicle to replace your Jeep, I'd advise to look at used vehicles. You'd be surprised at how close the price that a used luxury vehicle is, for example, compared with a 2011 JGC.
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  #46  
Old 06-18-2011, 12:04 AM
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Re: V6 High Pitched Sound

Sounds like you are a happy camper, which is what counts. Good luck with the replacement rig!
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  #47  
Old 06-22-2011, 04:47 PM
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Re: V6 High Pitched Sound

Noticed this problem in the last couple weeks and this thread just confirmed what I figured out. It's either the compressor or the expansion valve....
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  #48  
Old 06-30-2011, 03:33 PM
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Re: V6 High Pitched Sound

So, I gave up on the service department of the dealership close to my house and took the GC back to the dealership where I bought it, assuming they would be more motivated to fix the issue. The tech spent most of the day today troubleshooting the issue, then finally gave up and contacted Chrysler. They recommended the same thing reported by TylerC - expansion valve replacement. The part has been ordered and I'll be taking the GC back in next week to have the fix made when the part arrives. However, based on TylerC's experience, I not very hopeful.

Interestingly, a Google search returned a TSB on the Dodge neon, dated 2/9/96, that seems to describe this exact issue (though the RPM range is a little different). Here is the symptom/condition description:

Under certain conditions, the internal flow of R-134a refrigerant may set up a resonance in some evaporator cores. This resonance can emit from the dash area as a high-pitched whistle noise. The whistle noise usually lasts 3 to 5 seconds and starts shortly after the A/C compressor clutch engages. The duration and the intensity of the whistle noise may vary as well as be highly intermittent. The whistle noise is most likely to be experienced in ambient temperatures above 85 degrees Fahrenheit and engine speeds of 2,000 RPM or higher.

The recommended repair is to replace the expansion valve. In the last step, it says that if replacing the valve doesn't fix the problem, then the evaporator coil should be replaced.
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