Hello everyone,

I have a 2003 A6 2.7t TIP I recently pulled the engine and transmission out to fix a number of things and I am about to fire it up but for the life of me I cant get the retainer clip to seat on the lower coolant sensor that is located on the lower coolant hose going to the radiator.

I have tried to push it in with the o ring out and the clip just twists and wont "clip" in to position. I have looked the part number up on ETKA and I have the correct retainer clip.

the first pic shows how the retainer pinches in when I try to slide it in even without the sensor in place.


I feel very retarded at this point and I am frustrated... What am I doing wrong?