MiniTorque.com banner

1 - 20 of 22 Posts

·
Registered
Joined
·
8,732 Posts
Discussion Starter #4 (Edited)
loooks like 90% of the diesels we have at work. thought this was more to do with the turbo leaking a bit of oil?
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.

I could be completely wrong but from what I've learnt and seen about DI, making no design changes to the PCV system just seems silly...mind you, it gives manufactures an excuse to take more money off you for additives and cleaning agents to clean this up.

This is where I hope for Adam or czar to chime in as they have a lot more knowledge on the subject of direct inject.
 

·
Registered
Joined
·
3,198 Posts
Any build up in the intake will eventually find its way through the engine and into the turbos turbine , here with speeds over 600mph is the likely place for damage , but this will only happen after time , probably out of warranty so not a priority with manuafcturers.
Even with turbo failure they will just replace the turbo with the same potential again !!
Cleaning is hard as the build up goes into the engine , water injection will keep things clean but not many people going to use that
 

·
Registered
Joined
·
8,732 Posts
Discussion Starter #6
So BMW/Peugeot haven't implemented any form of carbon/gum-reducing measures in these engines..??

I've heard/seen that the BMW inline-6 engines use oil separators, even on the non-DI ones..
 

·
Registered
Joined
·
508 Posts
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!
 

·
Registered
Joined
·
84 Posts
Mines car is sat full of seafoam as we speak. used it earlier and it kicked out some serious amont of white smoke.
 

·
Registered
Joined
·
876 Posts
Mines car is sat full of seafoam as we speak. used it earlier and it kicked out some serious amont of white smoke.
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.
 

·
Registered
Joined
·
84 Posts
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.
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.
 

·
Registered
Joined
·
876 Posts
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!
Looking of Real OEM original cam cover was part number 11127572854 and was replaced by part number 11127585907.

I was going to fit a BSH OCC as water/meth is too much for me from a practicality point of view.

Would fitting the revised cam cover and the OCC be a good idea or is only 1 of them needed?
 

·
Registered
Joined
·
876 Posts
I'm doing both but still think at nearly 58k miles a walnut shell decoke is required or a port and polished head as not paying for a strip down and clean when a port and polish isn't much more whilst you are at it.
 

·
burble.. burble pop! pop!
Joined
·
442 Posts
thread resurrection, is there any reason why you crnt just block the pipe feeding into your intake off? then just have a pipe from the back of the head to a catch can can breather? why does it have to go back to the intake pipe?
 
1 - 20 of 22 Posts
Top