I have a 2008 RAV4 with 122K miles. About 2 weeks ago, the belt started to squeak a little, then I also noticed a knocking noise coming from one of the pulleys as well. Yesterday my wife drove the car, she states the knocking noise was worse and all of the suddenly the temp. gauge went ot max hot, and all the lights on the dashboard came on. I checked it out today and the coolant fluid tank is now completely empty. There's coolant fluid pooled in the bottom of the engine compt. bellow the area of the noisy pulley. Can someone help me out in trying to figure out what's happening, and most importantly, how much it will cost to fix it? Thank you.