I noticed a burning smell (oil I think) coming from my X recently... when I'm in park or stopped. It's a 2002 2wd and I know I need a new alternator belt but I don't think that's the cause. My A/C has been broken since 2009 (I know... I've let this go way too long... but I just recharge it in the summer) so it's probably a leak. But it's winter now and I have only turned the heat on a few times. Does anyone know what they think it could be? I read about bad head gasket but really not sure. Should I do a leak test by draining the antifreeze and adding water and dye? I don't mind my A/C not working still but I don't want this problem to blow up into a huge one. Any ideas? Pricing to have these fixed recommended as well. Thanks!