[Landseer]

Well, how did you address the pivot bolt?

It screws into an open passage of the waterpump.

How did you seal the threads?

Maybe its a bigger issue, maybe not.

I've found some unsuspected leak sources by putting about 5 psi of air pressure (no more) into the white filling reservoir. I used a spare cap, drilled a hole in it, and used one of those low pressure air blowing nozzles with the rubber tip to just add a tiny bit of pressure. You might be surprised of the source.