water pump

Curious to know if anyone else has had this problem since I haven't seen many others mention it. Apparently water pump leaks aren't uncommon on the B58, according to a close friend who's a technician at BMW. I've gotten the 'coolant low' warning on iDrive twice before. Once at around 15k miles...

I'm trying to source a coolant block off for a custom turbo kit that my friends performance shop is fabricating for my Supra. I already have the coolant block off for the engine, but I can't find anything to block off the water pump. Does anyone know where I can source a fitting to block off the...