I have a Volvo 480 turbo it keeps losing water .all pipes ok. rad ok .head ok.can anyboudy tell me why ?

if this vehicle is intercooled that would be where i start . have it pressure tested

Are you running the air? The condenser will ice up and when you shut the car off, the heat from the engine will melt the ice. Ta-da water!

CRACK AN EGG INTO UR RADIATOR, WILL SEAL LEAK, oops ss 4 caps, if it wont seal then ur exhaust, prob back end has gone, change it b4 u have to replace much morexxxxxxx

sounds like the seals need checking to me.

sounds like a soft plug to me...or a leaking intake manifold..

throw some sodium silicate at it :)

The only way an engine can lose water if there are no external leaks (pipes hoses etc) is if the head gasket is gone or there could be a small crack in the head and water is leaking into the cylinders. If it were leaking into the oil, your oil would turn milky in colour....my vehicle does the same thing, although small amounts of water are leaking into one cylinder, not enough to cause it to miss fire though! Best thing to do it have your water system pressure tested!

Do You have a leak?

Either your water pump, radiator cap, or a freeze plug is the only things left. I do not know how they connect to the heater core on a Volvo, but it just might b a leaky heater core/hose.