Originally Posted by WhiteRX

Either water pump impeller has fallen off (only ever seen on vw, audi and alfa's though) and very unlikely.
Heater core is blocked, hoses kinked, not allowing thermostat to heat up to open.
Headgasket (you should have coolant spewing out when you are bleeding the cooling system though if this is gone)
Thermo fans not operating correctly.

When you bleed up the car did you hold the revs at 3000-3500 rpm till the thermo fans came on? you cant bleed a car properly at idle. Also, dont worry about jacking the car up. It will bleed on flat level ground easily.