Why is it not the case that direct injection engines use a catch can/oil separator from factory?
Could be...plus the pcv routing blow-by into the intake (like it should) but as fuel doesn't touch the intake valves (DI) to keep the deposits down you get this.loooks like 90% of the diesels we have at work. thought this was more to do with the turbo leaking a bit of oil?
How you doing with yours? I used a tube in the bottle of seafoam and it got sucked up but then dispensed via an old spray bottle and this seems to give it more time to coat everything the slower you apply.Mines car is sat full of seafoam as we speak. used it earlier and it kicked out some serious amont of white smoke.
Mine came with a funnel so just used a 3rd at a time. did the first lot and left it for an hour and it kicked out loads. put the second lot in about 2 hours ago after i took it out for a good hoofing and filled up with tesco 99 fuel thats all i am using now.How you doing with yours? I used a tube in the bottle of seafoam and it got sucked up but then dispensed via an old spray bottle and this seems to give it more time to coat everything the slower you apply.
Looking of Real OEM original cam cover was part number 11127572854 and was replaced by part number 11127585907.You will find that since the introduction of the N14/B16 engine, the 11/2005 -11/2008 had a poor design of the PCV system, and the models with the this early cam cover, suffer more from excessive carbon build up.
The revised cam cover was introduced into the factory line from 11/2008 to 03/2010 for the S model, when the introduction of the new engine (N18) arrived for the S model.
So for those of you that don't want to fit a catch can, then you have the choice of fitting a later style 11/2008 - 03/2010 cam cover, and this has better PCV control.
Sadly the JCW model has not received this new engine yet, and so is still subject to carbon build up, but fitted with the latest 11/2008 onwards, revised cam cover for better PCV control.
If you want to control carbon build up even further, then as Adam has already stated, simply purchase and fit water/meth injection!
I run water/meth continuously and have no problems, and I don't use a catch can either!