zafira 2.0 dti smoky?

hi please help ive cleaned egr , replaced air filter,replaced diesel fuel filter, done diagnostics cleared all faults now car is smoky on start up ,Ive not long bought car it did go in limp mode as soon as i started driving home so i cleaned egr and done above service but now it smokes nerver before, ive done a bit research poss turbo oil seals ????? or oil feed restrictor boltive heard of but not seen any for the y20dth model please advise thanks
Ray