x2: if they break from simply lifting the tank then they should have been replaced long ago.

 

I filled it to the bread screw, I had the recovery tank raise, as well as the front of the truck slightly elevated and still had a problem and no heat. I pulled off the heater return hose for like 20 secounds untill I saw coolant start coming out, and put the hose back on, the air washed thru no more problems. I think the heat core had enough air in it to cause an air pocket that would not work out the ussual way.

 

Thank you guys for really vetting this out, Mike, we have spoken in the past but I definitely appreciate you reaching back out and making yourself available for a call again.
I plan on doing all of the recommendations this evening (elevated car elevated tank, removing heater return hose) and let you know how it works out.

 

You pulled the hose and did not turn the truck on for this trick, right? Please confirm.

 

Right, engine off. Otherwise wear a bathing suit.

 

The bleeding process can take awhile. On mine it helped to bleed while running, close the cap, shut off, wait a few, pray, drink a beer and then try again. It took forever, but ecentually it works. And don't drive it until your heater is blowing hot!

 

Update: raised the reservoir til the coolant came out the bleed screw, filled it up, and then pumped the hose while it ran, almost immediately got it blowing super hot. Drove it around for 20 minutes or so, temp gauge stayed pegged right in the middle. Thank you guys so much for your help!