Nevermind, solved it by disabling every addon of mine and enabling only SCars and one map.
@EDIT:
Now I know which addon breaks the view. For me, it breaks it in every SCar. It's... oh man... Wiremod.
@EDIT2:
I found more addons breaking the view.:
RagMorph
SmartSnap
CoverSnap

RagMorph should not be breaking it. I got it installed and have no issues what soever.
Camera conflicts are common. Most of the time it's because people don't know what they are doing when they create addons. In other words the conflicting addons will have to fix it. It's probably because they override the camera view when they don't really need to.

im quite sure the Player Resize addon breaks the tanks view, Player resize also breaks parakeets pill pack aswell

Well, I think it might be a solutoin. The bug is gone and i don't have Player Resizer anymore.
And it was so fun...

*sigh* wiremod

I have that crappy wiremod and everything is okay

i dont even have Wiremod or anything that would interfere but it still stuffs up

Look for any mod that changes the camera first, such as the ASDF mod. If it isn't one of those, then you'll have to sort through every mod. The best way to do this is to disable ten at a time, and figure out which ten has it, and then go from there.

still broken.dont have wiremod

I have problems but only with the main tank seat. I press control but cannot zoom out like with other vehicles.

i also have stringmod and its fine

oh wait i mean ropemod

when i shoot far it blow up close