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Old 22-10-2013, 02:23 PM   #29
BG1.8sp
Senior Member
 
Join Date: Jul 2008
Location: Sydney
Car: 2009 BL MPS
Posts: 2,300
for some that don't know... MPS' have major issue with carbon build up on the back of the valves...
this is due to:

A) Direct Injection
B) EGR (combination with the above... no fuel to keep back of valves clean)
C) An absolutely sh*t house PCV design (almost as crap as the sp20 pcv lol)

So that is the reason for me pulling off the intake manifold and cleaning the back of the valves.

and to reduce (almost eliminate) future build up I am doing the EGR delete. and because I am increasing intake flow with modded intake, Inlet pipe and inter cooler, and i am upping the boost, oil catch can with check valve, this will help out the system dramatically.
will mean if i keep up with upper engine cleaner every 12months my intake runners should stay pretty bloody clean

I suppose some would say oil catch can and check valve is a "band-aid fix"... but stock system is adequate for stock boost and flow... I am not aiming for drastic power improvements, so OCC and check will be adequate
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