Howto drain the cooling system mxu 250

[beaviz]

Hi,

I want to change the cooling water on my mxu 250.
Does anyone know, where the draining bolt should be?
Can't find it in my pdf files, and how to handle it.

The temp keeps going up to 3 bars, maybe its the cooling water.
The level is good, but i don't know if the previous owner added cooling liquid.

Or maybe its the waterpump. I hope not...

Is it the bolt i marked 1?

[beaviz]

I was correct..

Just got a service manual for the mxu 250
sorry for the obselete post...