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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > Red boost pipe, oil catch can. SO WHAT.



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      10-06-2013, 02:48 AM   #1
theg00se
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Red boost pipe, oil catch can. SO WHAT.

The oil leak from the red boost pipe has been done to death and to cut to the chase the fix cost about 12 for two seals and about 1 and 1/2 hours to do fix. The oil catch can has been talked about many times but no one seem to have cracked it yet.

So let's say we have fixed the boost pipe leak and now all the oil is contained. Does this mean the oil is now clogging our intakes oven quicker than normal? If this is the case would it not be better to let it leak until we crack the oil catch can then fix the boost pipe seals.

Finally and probably most importantly what will happen if we just ignore the leaks and just keep the oil topped up.
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      10-07-2013, 05:35 AM   #2
Puerto Rican 335d
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Check with 335dwagon he installed a catch can from BMS and we're still waiting for pics and results
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      10-07-2013, 04:31 PM   #3
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I am very tempted to split the breather pipe which carries the crankcase gases and oil residue to the intake.

I was thinking of capping the intake entrance and allow the cranks to vent to atmosphere via a long silicon pipe to the underside of the engine and not have an oil catch can at all. My only concern at the moment is that the engine monitoring system will sense that their is a pressure drop in the crank case or at least a pressure difference and then compensate in some way that harms the engine. Mind full that the re-circulation of these crankcase gasses is not to improve performance it is to be clean and not pollute i'm hoping that there is nothing to worries about.

I have a high performance sport bike and it has many crankcase vent all over it and the filler cap has a breather and filter of its own. i figure that if a bike that revs to 18,000rpm vents to atmosphere then our cars should be fine.

Any ideas from you engine specialists?
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