New 2012 Overland intermittent noise caused by leak from thermostat housing
I bought brand new 2012 Overland about 2 months ago, and within about 2 weeks the car started making a strange intermittent noise when I would turn on the engine (after having driven and parked it - so engine wasn't cold). I called the dealership right away and reported and it, and they told me to keep an eye on it....well, I decided that since I couldn't replicate the noise on demand, I would just being recording the startup with my iPhone each time, until I caught the noise.
I managed to record the noise 5 different times - it sounded a little like a honk, or a fart (if a car were to fart), and was coming from the engine - always upon start up and within 15-20 seconds of turning the car one, with the AC on.
I took in the vehicle and played the recording for the Service Manager and Mechanic. After having the car for a week, they told me they couldn't find anything wrong and couldn't replicate the noise. I told them that I wasn't interested in picking up the car until they fixed it...magically the next day they were able to duplicate the noise at the dealership, and discovered that it was caused by a leak coming from the Thermostat Housing, that was causing fluid to drop onto the belt and A/C compressor - causing the compressor clutch to slip when turned on and thus making the honk like noise. IF they even bothered to look under the hood they probably would have been able to diagnose the problem right away because there was a very obvious white fluid dripping down the engine.
They tightened the screw and sent me on my way. HOWEVER, after about a week and half with the car, the noise has returned. The dealer told me that they had looked into ordering a replacement part for the screw (or something like that), and that it was on serious backorder, indicating that its a broader problem, that chrysler is likely aware of.
Just wanted to share my story in case any other owners are experiencing the same issues.