2002 X5 E53...clanking sound from engine. Need Help

[harleyclassic2]

http://youtu.be/gu1GiDgLeY4

PROBLEM:
Clanking sound from the engine with all accessory belts removed.

BACKGROUND: (home mechanic using Bentley Manual & Bavarian Technic Cable with program)

1)Started with Radiator leak..so replaced it

2)Had to replace water pump (since fan nut really wouldn't come off), so also replaced tstat, tstat sensor, radiator outlet sensor (on bottom hose of radiator)
Needed a driver's side engine cover gasket - oil leak-- replaced.

3)On start up and after driving 60 miles..bottom radiator hose coolant is still cold, top is hot but do get heat in car. Bleed screw got air out (to best of my knowledge, 3.2 gal of rated coolant capacity in engine used, so no trapped air hopefully (?)

4) Shouldn't that bottom hose be at least a little hot?

5) Then..as if that wasn't enough started getting that clanking noise from the engine..as per you tube video link posted above and here again
http://youtu.be/gu1GiDgLeY4

Hooked up laptop to Bavarian Technic cable & got:-

Did a error code test and got:
0021 Camshaft Control,
007 D Temp Sensor rad outlet (was replaced-aftermarket),
0073 Hot film air mass,
008C output thermostat map cooling,
0050 Secondary air system,
now 48 Torque converter too much slip

Don't know what to do. Thank you in advance.