What is an easy way to break loose the autotensioner bolt?

I am tried using an 6" open and box end 10mm wrench but I cant it too budge.

 

socket...with a short breaker bar, also its easiest to reach it from below with the car on a lift or on jackstands

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PreludeRacer023 &raquo;</TD></TR><TR><TD CLASS="quote">socket...with a short breaker bar, also its easiest to reach it from below with the car on a lift or on jackstands</TD></TR></TABLE>

Also you can remove the driver side motor mount and jack the engine up/down a little to get more clearance.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PreludeRacer023 &raquo;</TD></TR><TR><TD CLASS="quote">socket...with a short breaker bar, also its easiest to reach it from below with the car on a lift or on jackstands</TD></TR></TABLE>

I dont know what socket you guys are using but i am almost positive mine wont fit.

There isnt enough room to clear the nut and fit the socket over it.

This is from the top and the bottom.

 

I've also used a 12 point wrench and hit it with a mallet to break the bolt loose...