where can i get a 22mm crows foot?
 

need to replace o2 sensor and a wrench aint cuttin it... i checked out canadian tire and lordco and they dont have anything bigger then 19mm

KMS or the SnapOn truck should have a 22mm crowsfoot but what for? The plug should fit through a regular 22mm box-end wrench or why not buy one of these:

http://www.sears.com/shc/s/p_10153_1...0070921x00003a

If for some weird reason you reaaaally need a 22mm crowsfoot or flare style wrench, just modify a 7/8" - plentiful and cheap.

try napa. ultra makes a 22mm o2 sensor socket. i have it and its pretty handy.

Get a proper O2 sensor socket. You need as much contact area as the O2 sensor is pretty stuck on it. Shouldn't be more than a few bucks at Princess Auto. The KD one is okay, but not all sensors are that deep (or have that much access).. so YMMV.

modify how??

KMS, in the clearance section, at the back of the store, there's bound to be a 22mm crowfoot from either KD, Easco, or Herbrand. I bought one for $3.00. It's NOS (new old stock).

+1. I'd never go back to screwing around with wrenches again. And put some anti-seize on the threads of the replacement to make it easy for the next guy.