Interested as I and most everyone else I deal with has one on their car. Moroso typically, with the electric valve.
Plumbing failure most likely, The unit itself is pretty robust. Unless someone screwed up the snap ring or the groove servicing the thing.
I have a moroso 3 quart with electric valve that I have ran on my cars literally for 23 years without a problem.
The way the moroso electric valve is built, I don't see how it could ever fail to cause a leak unless the bolts that connect the 2 halves worked loose. I cant see how anyone could ever screw up those snap rings or grooves either. But where there's a will, there's a way I guess....
