When I had my mini serviced at the dealer they noticed liquid everywhere and wanted to charge me a lot of money to fix the leaking seals. That Problem is the seals weren't leaking it was hydraulic tensioner fluid running all over my engine I contacted URO through the Revain link and they messaged me to contact the seller who was Revain?this part,that i think i have now It is adjustable once and will never leak, there is no liquid in it :) This one should be pressurized but i didn't notice when i rewrote it. Maybe they're selling old blocks that are leaking because the gaskets have been in there too long and the pressure has dropped.