hello thanks for help I have a Volvo 850 my friend had for 3 yrs it ran good but smoked he parked it. I bought it from him bc it’s nice car well anyways turbo was shot broken shaft I ordered used turbo I pulled head had 2 machine shops magnaflux it at 1 and made the second pressure test it. Got Volvo brand head gasket and bolts for head I tourched to spec do everything right pistons and cylinder sleeves look good as far as I could see spinning crank we’re they all go up and down get it back together runs good 2 min they in godly amount of white smoke not oil or gas steam looks like please help thank u good men and women