I can see myself using a 14mm or 9/16" (whichever is wrong) and rounding off the bolt. First bolt I did was the bolt in front of the #2 cylinder, where it is piggy backed with the alternator bracket support. I was using a 9/16" offset wrench and it felt like I was rounding the bolt. I was so tired I just threw the wrench and took a shower. So what's the right size?

 

3/8" or 7/16"...i think lol