[Dippydog]

I've never owned a turbocharged car[still don't]so don't know the intricacies of them.The one I've been asked about is fitted to a 2.4 petrol engine and is the low pressure one.There is oil in the pipework such as the one that goes over the top of the engine,this I'm told is due to the turbo oil seals going/having gone.So the questions 1] do you just replace these seals? 2]replace the turbo entirely and if so is a second hand one worth the risk? 3] buy a new turbo core which presumably comes with new seals already fitted? 4] What do the different numbers[16T for example]mean and does it make a difference if you fit say a 16T to a turbo housing that has a different T number?