Ok anyone, I have a new question for the same thing. The capillary tube fits into the water jacket against a lip or flange. The nut tightens down to the flange on the capillary tube making the fitting water tight (I assume). Can I just run a 5/8" -18 1/2 " bolt down and use permatex on the bolt to make this a water tight fitting or plug? Actually, the head on the bolt won't torque tight down on the head as the 1/2" is too long, so it's really just threads I am guessing.

Last edited by Jeff Mitchell; 11/10/2013 1:39 AM.

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