Recently bought a v70 t5 250000 on clock (don't ask y mad moment on eBay)
oil in water n vice versa , presure tested head n replaced head gasket
fired new timing belt , now after few minutes after start up White smoke comes from exhaust n if u rev it gets worse any suggestions ?

 

If the head gasket was replaced maybe there is still some oil in water or vise versa. Were both systems flushed? If not, maybe it will burn off soon or check the systems for contaminates. Also, was the head warped/damaged?

Does "n" = "and". This site is NOT a text message. Spell things out so we can understand what you are writing.

 

also when you have oil contamination in your cooling system you really should replace EVERY hose that carries coolant as the oil ruins the hoses and will continue to coat the inside of your radiator, heater core and engine.