My 2005 Elantra GLS began making a strange intermittent sound when the air conditioning was on starting about a week ago. At first, with the stereo on we thought it was a rain stick- an occasional short-lived sort of swishing sound. Then suddenly it got louder and constant but stopped as soon as...

OK. Noticed yesterday air condit was warming..... Looked and engine temp was high. Saw cople drips going under car, assumed it was coming from the AC- Put some coolant in res.... took half a jug... I replaced the T Stat and gasket this aft- 1- Replacement T stat looked different! It fit tho...