If you do bleed proces properly, you will get rid of waterfall noise after a few repeat process with engine cold, if you don't there could be 2 reasons,
1- connecting hoses to heater core are backward (flow trough core should be correct direction) or it won't let air completely escape.
**2- make sure heater core flow's freely, & Is not partially clogged,, Because if it's even a little clogged but water still flows trough it, it will make it very very hard to get rid of air, & some will stay in core,,
When most ppl have a hard time getting rid of waterfall, it's one of these two reasons, mostly the second, (partially clogged heater core) but since they still have some heat coming out of cabin vent's, they don't realize it,,

 

Have you tried opening the T-fitting and raising the expansion tank in the air, ensuring the expansion tank constantly has coolant in it and doesn't get too low to allow air to enter the system?

The best solution for me was to actually fill coolant into the system through the T-fitting. Unscrew the fitting, get an appropriate funnel to fit that tiny hole, and top up coolant through that fitting. That's how I always add coolant now, it eliminates my waterfall for a long time. Waterfall's back somewhat now, but I also haven't topped up in about a year since replacing my leaking water pump gasket.

 

The Airlift tool is great. I filled as much as I could by hand (was bone dry), opened bleeder, raised tank, etc. Plugged in the Airlift, and it pushed at least 2 more quarts in.

 

I posted this a while ago.

Sounds silly, but it works every time - and I've done it many times as I seem to be obsessed with coolant temps and ticking...

1. Get the front of the truck higher than the rear (ramps, driveway, incline)
2. Open the bleed port on the upper hose "T" fitting
3. Fill the overflow tank with coolant
4. Here comes the silly part - I put my mouth on the overflow tank opening, and blow
5. The level in the overflow tank goes down as the pressure forces coolant into the system - you can hear air rushing out the bleed port
6. After two or three times blowing/filling the tank (stop blowing before the tank is completely empty to avoid forcing more air into the system), coolant will start to squirt out the bleed port
7. I keep blowing coolant out the bleed port as I screw the cap back on (as to not let any air back in through the bleed port)

Works every time - have never heard the "waterfall".

Goes without saying - but - make sure the engine/coolant is not hot.

Bring on the hazing...

 

Haha I did the same with the power steering. Works great. The Airlift tool works in the opposite manner, it sucks all the air out, and then displaces it with coolant

 

What a Blowhard!

 

Right???

 

I do the same thing, I did some research.... Our lungs can push about 2 PSI, enough to push fluid.

 

Thanks for the different methods guys.
My Disco isn't overheating but I'll try the blowing in the overflow tank method this weekend. I'll report back.

 

I still get it and I know everything is clear BC everything is new and I bled it countless times. I'm fixing to say the heck with it and go with the inline set up