F it doesn't press in that's fine and it wants to be closed, if it is off the vehicle and you can see it then you can blow on it to see if it easily leaks. I did with my new egr and it did but I pressed it on and let if come back fast and it sealed.
Anyway it should only open when it is connected and working, but if you press hard and slow it may open with the gears but should spring return. It should not just push in easily with no resistance.
Not really sure if we're on the same page here exactly mind
I'm referring to the valve itself.
56 350 2.2 130ps mk7 with 2 side doors
65 290 2.2 125ps custom with 2 side doors
07 350 170ps
Ids v86 licence + v86.04 update + xprog
hereIds map
here