Originally Posted by Ravie
Even if you had reversed them all coolant does is run through the lines. Something else is going on. Blocked upstream perhaps..
I took everything back apart. The heater core was blown. The HVAC box was full of coolant AGAIN.
What do u mean blocked upstream?
When I put everything back together the first I drained the radiator. I ignored the bleeder screw and just filled the rad and left the reservoir open (as was suggested to me by my buddy who is a mechanic). Needless to save that left air in the system and the jeep briefly overheated for maybe a minute. I quickly turned it off and waited for it to cool down before refilling the coolant the proper way as listed on wjjeeps. Everything was fine. I drove the truck home 40 miles and drive it to work the next morning and when I went to leave work I saw a list mist starting from the vents. ; (
I have the new heater already installed in the HVAC box and the box is sealed and ready to be installed. I just want to try and figure out what went wrong so this doesn't happen AGAIN.
1. Briefly overheating with air in the system blew the core?
2. I somehow reversed the lines going to the heater core (which I didn't think mattered)
3. A faulty part (someone would have to die if that's the case)
What's everyone think?? Help please Im trying to get it put back and running as soon as I get off work today so any input would be great. Thanks!!