i have just brought an escort combi with the engine blown so i have coverted it to a 1.8 zetec bottom end with uprated cam new oil pump ect. but i have had it on the road 1 day and it smoke blue smoke when you change gear and deaccelerate but not when its on boost i am only running 4 psi at the mo. its an original 88 turbo with alot of play in the shaft. but could it be sucking oil through the valve seals when the engine deaccelerates. also another problem the cam is quiet noisey on tick over but fine when you rev it up. thanks rob