[QUOTE=UpstateNYA4;820343]Air lock - what's that? Is it the term for a valve being stuck closed due to bubbles? Sorry if this sounds dumb - I've never heard the term before.[/QUOTE

can someone give me a brief run down of this? i'm assuming it's when air gets into the cooling system. how can i fix this? sorry for the newb questions AND bumping an old thread but i'm going through this sort of problem right now and trying to figure a few things out before i take it into the shop.