The testers normally seal just like the radiator cap which seals the port to the overflow tank

10 hours ago, Patcon said:

The testers normally seal just like the radiator cap which seals the port to the overflow tank

I am not able to seal the water **** with this o-ring. Water droplets ozz out after 2-3 mins of idling. I am not sure what to do here. This vacuum co*k is a nightmare. I am thinking to use GE Silicon around it 😆 - but I want to try the guy recommended in the old thread in WI who fixes it. May be he has a cure. Planning to send it to him. He charges $100.

Sounds like a good idea to me. Fortunate you were able to find some one that’s willing to take it on

33 minutes ago, Yarb said:

Sounds like a good idea to me. Fortunate you were able to find some one that’s willing to take it on

He has mentioned o-ring wont work and that correct flat washer will and he will pressure test it as well before shipping. Keeping my fingers crossed.