My Heater hasn't worked for a bout a month now. By "hasn't worked" I mean it would work on low or if I turned it off then turned it back on. Then it would work for a brief period. I figured it was because the truck had water in the radiator and had planned on fixing that tomorrow anyway. (3rd owner hardships)

Last night after work I fired the truck up and a mist of antifreeze blew out of the dashboard. This lead me to believe that the Heater Core had sprung a leak. Today while doing an arron for work I noticed I had trails of rust water running from my floor vents, another sign of a bad heater core. Well as soon as I got back and shut of the truck I checked for leaks. After inspecting all I could find I didn't see any. When I came back out after work I had a big puddle behind my front passenger tire. When checking for leaks I noticed a trail of rusty water down the side of the frame between the exhaust shield and the frame. I also noticed a trail down the back side of the bell housing.

I'm not sure if I have multiple things wrong with this truck or if the heater coil could be the result for all of them.

Pics:


Behind the transmission

Between the frame and the exhaust heat shield

Passenger side floor vent

Driver side floor vent.

Note: there is a puddle in side the vent box.


Update: It doesn't seem to leak when the heater is actually going. It only seems to leak when I turn the heater off and not before. Not too sure why. I haven't found any leaks in the hoses.