I had my coolant gauge rebuilt and finally added coolant to the engine today. It was leaking out of the hole that the capillary tube comes out of. Is there any kind of gasket that is supposed to be between the bulb and the retaining nut? I had silicone tape on the threads. Anything else that I need to do?
It is leaking along the capillary tube right where my index finger is.
Strangely the back of the bulb is a flat face, but the nut is concave like it should accept something that is cone shaped. Could the rebuilder have put it together incorrectly?