Thanks for the reply, and yes all filters are replaced, even with an injector cleaner According to the bill of the dealer anyway I've talked to them yesterday and next week we will check out if there are any fault codes in the car i'm thinking now that the timing is out, due to last cambelt replacement I'm not a complete newbie in the mechanical area.... (On my last car, the mk1 gal 90ps tdi, i've replaced the evaporator in the IP in about 7 hours; not bad i assume...) But in this case, yes the big cloud of smoke is UNACCEPTABLE