Most likely due to freezing. When I run the pump, it cannot sustain pressure with an open nozzle for more than an instant. Water drips out from 2 of the 3 “cylinders,” where the brass head meets the ceramic body. The water that leaks out has a light oil residue on the top, minute enough that you can only tell by observing the “rainbow” effect upon changing viewing angle.
The oil reservoir has no water in it. However, the area around the two pistons has the light frothy “chocolate milk of death.”
So, is this a case of water seals going bad, causing water to drip into the area where only oil should be? Or, is it a case of an oil seal failing and causing oil to mix with water?
The fact that it is losing pressure and producing a small burst on an interval makes me think it is just the water seals in the head that are bad. What do you guys think?