I have everything down to where I can get to one bolt out of the two that holds the Thermostat housing. The bottom bolt I can't get to because of electrical harness that I can;t for the life of me figure how to move out of the way..
Anyone with a how too out there ? I don't want to put it all back together being this close.
Thanks

 

Not the best how-to video but he does show he used a wobble extension to get at the bottom bolt.


Not an RDX but some coverage of wiring harness clips to release, not sure if the same for RDX.

 

Finally got it. I had the wobbly extension , but there was still no way to get the socket on the bolt. Kept looking at it and noticed a metal bracket the wire loom was attached to. The bracket had a 17 MM bolt on it going into the top of the transmission.
I took the bolt out and then could pull the wire loom back away from the stat bolt far enough to get the socket on it. I broke the bolt loose. Leaving the socket wrench on the stat bolt , I then realigned the 17mm bolt and threaded down about half way. I figured
that if I hadn't done that, there would be a deluge of antifreeze going down that hole when the stat was finally fished out it's housing. I thought right , there would have been a mess. Everything is set right now and just a few things to button up ,
just simple stuff like the air box ect.
Thanks for the reply though.

 

I just went and looked at my RDX and it does look like the harness slips onto and clips to a vertical metal tab in a couple of places and, like in the video, there are plastic tabs to release the harness from the metal tabs, at least that's what it looks like to me. I think the 17mm bolt you remove was one those metal brackets with the vertical tabs clipped into the harness.
Glad to hear you you're nearly done with this job. I've not done much on the 2016 RDX yet but have fought with the wiring harness on my gen 1 RDX a couple of times and it can be a real challenge.