i reckon mine is too fooking bastards gives out cold fooking freezing piss taking air

can someone pls explain a bit better and how to exactly flush it??? I wanna try that before i think about replacing it?? Where do u put the hose to it to take the crap out? I seen some pipes going into the bulk head rite behind and underneath the inlet mainfold does that have anything to do with it? If it does then how u supposed to do anything there the space is so tight.

Pls someone help my hands are so cold to carry on tying