Hi, I traced a coolant leak on my 2012 CR-V (EX-L AWD) to the coolant temp sensor located on the lower left side of the radiator. I have pulled apart all the hoses and the front bumper to remove the radiator and take a better look. The plastic housing around the sensor looks fine and so does the sensor. The O-ring looks fine too (visually). All I could see was that the sensor seems to have been over-tightened by some technician at some point because a little bit of the plastic around the sensor bolt was chipped in.
I did a vacuum leak test of just the radiator (see picture below) and the system lost pressure within 30-60 seconds.. I can only guess that it's leaking out of the coolant temp sensor bolt.
Could any of you advise on what should be my next course of action - should I just replace the O-ring or should I get a new sensor or should I replace the entire radiator?
Thanks to everyone in advance. -Rick.