I have an 07 Dodge Nitro RT 4.0. The other day I had the water pump replaced and it costs $560 They did not change my timing belt the next day my car lost power and now I can't get it turned over. I had someone hook it up to the computer and it said it was the timing belt. Should that have...

Guys and girls, at the moment i'am busy with the post from Meder for the How to:timing belt replacement. It also includes the waterpump, can someone tell me if we have to de-air the system when filling up? Or will it gobble to the point when starting up the engine? I've read that there is a...