[Haug530d]

No one changed that shit ?!

I have changed it on a N43B16 engine, well i did a completely overhaul of the head, but it should be the same as the N43B20 engine.

No need to drain coolant, but some will be drained out the head after you removed the EGR valve.

What you need to do is loosen 2 bolts on the pipe comming from the exhaust, this is best to do from the underside, (actually it's best to do this with the subframe removed)
i managed to break one of the bolts doing this.

After that you will also need to loosen 2 bolts on the other side of the EGR, it's best to remove the vacum pump or maybe the intake manifold to gain acess.

the EGR valve is connected to the head with 3 hex bolts and it might be a little stuck because it is a O-ring sitting on it.

But mark my words, i did this with the head out of the car, this job is gonna be a hell to do, it's very tight space to do anything.