Urgent help please, coolant fluid won't come out!

[Mordiization]

I thought I would flush my coolant on my 2000 VW Polo 6n2 1.4l 16v today.

When I flushed the radiator, it came out just 2l. It should be 5.6l.

What shall I do to drain the remaining?

If I'm filling water into the reservoir, the reservoir is filling. It does not drain into the radiator.

 

The other thing I wonder about, is that there are two holes for my temperature sensor to go into. Could mine be in the wrong hole, does it matter?

[alexperkins]

You have to remove the thermostat from the block to drain all the coolant

Also ensure the heater is turned to full heat

It’s very hard to remove all the coolant from the system.

The blank in the housing is just for additional sensor your car doesn’t have

[Mordiization]

Do you mean I should have the car turned on?
Could you inform me more about the position of the thermostat on the block?

[alexperkins]

No no no!!

The thermostat is located at the engine side of the lower radiator hose

You just turn the hot/cold dial in the car for the heater to hot with the engine off

[Mordiization]

I took the thermostat out, but there were little to not water there.

[alexperkins]

Flush it through with fresh water from the expansion cap. You will never get all the water out. It’s not physically possible. It needs 3L of undiluted G13 coolant and the rest topped up with water

[Mordiization]

Thank you so much for all the help, man!
I even found out my thermostat was broken.

Do yo have any experience with the specs in the manual, is incorrect?
In my manual it says all polo engines have a maximum of 3.2l oil capacity.
I have filled 3l, and it's way over maximum.