I wouldn't recommend ANYONE in the Phoenix area (save for maybe a dealer or one of us) to work on a Montero. Have you checked the Devil's own heater hoses, running from the firewall to the back of the engine? Probably would take a flashlight to see for sure.

Which airline do you fly for? My brother has been over at U.S. Air/Am. West for about 25 years now.

John B.