https://x3.xbimmers.com/forums/showt...1219853&page=5
did it from the top. took me about 4.5h.
It's not hard, there's no many steps , it's just fck long (no space ) !!!
No space, so you got like 1'' to move the ratchet to undo a bolt, etc.
So here's the steps very briefly.
1 - remove front strut bar (11 hex screw) - 5 min
2- remove radiator fan (1 hex screw). 5 min
3 unbolt the cooler attachec on the fan (2 hex + 1 clip). 5min
4 - remove the skid plate 5min
5- remove the easy accesible collant hose clips . 5-10 min
6- remove the 3 10mm bolt on the water pump. 10min
7- remove 2 10mm bolt on the thermostat . 5 minutes.
8- try to remove the remaining hoses on the t-stat and water pump (6mm hose clamps and clips). 1.5h
9- get the pump out from the top.
10- put back just like the uninstall. Note : put the hose clamp screw so they can be accessible from the top. way more easier for the next job. 1h
11 - 50/50 bmw blue collant with distilled water
12- bleedind procedure . Car ON (engine off), heater T° to the max, low fan speed, press the gas pedal for about 10-15 sec until the pump start running. it will run for a while, somthing like 5-10 minutes. (leave the key in the car for those with keyless module) 25min
About torque specs... well you can forget it around the pump and t-stat area. A 1/4'' ratchet was hard to get in, so a torque wrench would be almost impossible. unless you have specialze tools.