Got new hoses and installed them today. I "modified" the hose that sits inside the overflow reservoir. I attached that hose directly to the "straw" that goes through the reservoir cover. The factory set up has the hose attached to the reservoir cap and not directly to the straw. I can't really figure out why it was designed that way, it just seems weird to me. Also, the "straw" was very loose and I saw coolant bubbling out from where the "straw" attaches through the cover. I almost positive that is where the air leak is. I'll give it a few days and post an update to let you know if my "mod" fixed the problem. Thanks for your help!