Heater hose routing = doesn’t matter it’s an in/out system. I had gurgling on my 02 Kalahari, then it stopped so I figured an air bubble, then when it got cold I had no heat. The gurgling I had was from a clogged heater core that finally clogged up. I removed the OEM lines, flushed it backwards first & a huge blob of white snot shot out, let it run clear for 5min then I flushed it the opposite way & just replaced the line with 6.00 worth of 5/8 heater hose & I routed it straight in/out.

I have a tread on this topic somewhere

in a a nutshell, raise the front of the truck and get the expansion tank elevated and do the bleeding process again

i had to replace mine because it was full of garbage.

Yep just make sure you first flush it in the opposite direction first. You wanna push the clog out the way it came in or was made vs push it further into the core itself. Either way flush it with a hose. Mine truly puked out some nasty stuff between a large zit & snot lol. After that zero issues or sounds.

I was able to do it without loosing barely any coolant at all.