I'm having trouble removing this nut from behind the tail light, the one with the brown plastic clip over it. I used wd40, let it sit overnight, to try and loosen it but it didn't work. When I try to turn it with my wrench (very difficult to do because of lack of clearance all around) it seems like it's smoothing out the corners of the nut. The screw's too long for me to use any of my socket attachments from my drill. Anyone got any tips?

 

Use a deep socket on a ratchet.

 

If the wrench is rounding it you are most likely using the wrong size wrench. Be sure you have the correct size. Hard to tell the scale from the picture, but I am guessing that is a 10mm nut.

As mentioned above, use a deep well or mid deep socket on a ratchet. Do not use a drill or power tool for small stuff like this. You just risk snapping the stud off if it is bound up that way.

 

IIRC, those nuts are 8mm.

 

As recommended above - do not use a drill. Do it with a ratchet an extension if needed, and a deep socket. Usually a 6 Pt. socket will avoid rounding issues.
Maybe I'm missing it - but I don't see a brown plastic clip in the picture.

 

Thanks for the suggestions everyone! I just had the mechanic who was replacing my exhaust (I recently bought this thing and it had a god awful after market exhaust on it that made it rattle like crazy around 3-4k rpm) and he get it lose and out in like 5 min with a vice grip wrench I think. Funny thing is that I tried getting a dealer to remove the nut while I was getting an alignment done, they rounded it off even more and then said if I wanted it off it'd be 1/2 hr labor.

And noodels, the reason you don't see the brown plastic clip is because it goes above the nut, which I took off since I was trying to remove the nut.

 

Ok but did not reply to this post

 

My bad noodels, I think I scrolled too much, hit another topic, saw your last reply mistaken for rpg51's comment.

 

This whole thread gave me cancer, thanks.

 

WD-40 was unnecessary; the bolt is not exposed to the elements. Buy metric deep well sockets and line wrenches. Remember, righty tighty, lefty loosey.