Mcoates94 Posted May 24, 2012 Report Share Posted May 24, 2012 Hi all - Curious if anyone else with a 2011 3.5 hear the same thing I'm hearing. With the air off - all is good and quiet. If the air is on, when accelerating from a stop I hear this 'straining' type noise coming the engine compartment. It starts in 1st gear and gets really noticable in 2nd and 3rd gears. Then it seems to disappear come 4th gear. At first I was thinking power steering of some sort but I have assuredly narrowed it down to when the air is on. Any thoughts on where to look or diagnose further? Thanks Quote Link to comment Share on other sites More sharing options...
Cellbine Posted May 25, 2012 Report Share Posted May 25, 2012 I don't hear anything when Im driving, only when Im parked. I def chaulked it up to be the Aircon. It is loud and I dont like it. Makes me feel like my car is out-dated or something. But it is getting hotter where I am and the climate control is set to auto when I remote start it. So it really starts to blow until I get in the vehicle. There is a lot of fan noise and some clicking, but its normal as far as I know. I do not hear what you describe when I drive though. Quote Link to comment Share on other sites More sharing options...
Mcoates94 Posted July 22, 2012 Author Report Share Posted July 22, 2012 Broke down and scheduled an appointment with the local dealer only to hear that this noise is a normal compressor noise. I'm still not convinced having never driven a car that made this much noise with the a/c running. Maybe I'll try a different shop. Quote Link to comment Share on other sites More sharing options...
RJG Posted July 22, 2012 Report Share Posted July 22, 2012 Maybe secondary fan is cutting on and off....as needed. Especially now in hot weather. It may not engage at all if A/C is off. See if you hear it with A/C off. Compressors are not normally noisy. Quote Link to comment Share on other sites More sharing options...
Mcoates94 Posted July 23, 2012 Author Report Share Posted July 23, 2012 It is definitely only a noise heard with the A/C on. Momentarily ( a second or two) after turning the A/C off, the noise stops. To add more info, the noise is proportionate the RPM level - more RPM's more prominent noise. It also only occurs during acceleration. I do not hear it at idle or while reving in neutral. Quote Link to comment Share on other sites More sharing options...
Mcoates94 Posted August 22, 2012 Author Report Share Posted August 22, 2012 After a repeat trip to a local dealer, they acknowledged something didn't sound right and ordered a new compressor. They put it in, and viola, no more noise. Ultimately, the tech said it was likely a bearing inside the compressor was this issue. Glad this is resovled. Quote Link to comment Share on other sites More sharing options...
JOEHIO Posted August 22, 2012 Report Share Posted August 22, 2012 Amen to that, glad it has been taken care of for you. Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 22, 2012 Report Share Posted August 22, 2012 Glad it's resolved. I have heard this type of noise from failing compressor clutches, the repair usually being to replace the compressor Quote Link to comment Share on other sites More sharing options...
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