Coolant sensor install problems

[scoots]

I replaced a thermostat housing in my 2006 V6 which was leaking. I am unable to get the clip that holds the sensor in place to work. I have a new sensor, since I did not realize you could just replace the "O" ring on it, but the clip seems jammed and wont slide thru the opening and around the sensor. When I take out the sensor the clips slides around it with no problem. Any thoughts on how I can fix this. I even bought a new clip to no avail and this should be the least technical part of the replacement. Thanks in advance for any input.

 

[Low86GT]

If the clip is not going in either you aren't pushing hard enough or the sensor is not seated down all the way.
When I helped my nephew replace the housing on his we installed the sensors and everything onto it first and then installed it as a unit.
Hardest part was that stubby little hose on the front of it.