Heres a guide on how to refill the fan clutch on a hiace
http://offroad80s.com/how-to-top-up-your-fan-clutch-and-do-the-blue-fan-clutch-mod-t1160.html
So I've got a 1kz-te 93 hiace super custom with 107k kilometers on it and am working on the cooling system i read the fan clutches go out after 160k anyone had experience with that?