Size of the nut on the motor mount...mount?
 

Alright guys, so as some of you are aware, I'm in the process of doing an engine swap in my '04. I've got the engine held up by my hoist...and on the drivers side motor mount, not the black part of the mount, but the aluminum mount that's secured with two bolts and a nut to the block, what is the size of the nut? *Going off of memory here, but I think it's the one furthest to the top of the aluminium mount. I attempted to use the same size socket as the bolts, but I absolutely could not get it on to bite.
I can only assume it's a different size, problem is, I can't really find the right size.
I'm to the point now where I'm about to buy a nut splitter and crack the bitch off of there. Lol
Thanks in advance

hmm, I forgot, maybe 17mm ?

I think all three are 17mm....but I have changed the nut on mine...so it may have been something different stock.

Shouldn't be too hard to tell ;) It's either 17...or bigger or smaller :) Likely with a Mazda either a 14 or a 19....cause they don't use 15, 16 much if at all...

That little bastard ended up being an 18 mil, on both sides.
While the bolts themselves were 17's.