And this is why you need an OCC

elim11 · 06-22-2010, 01:55 AM

People keep preaching the importance of an OCC. How their IC piping is lined with oil, etc. I replaced my IC last week and I finally(unfortunately) could put pictures to that statement.

Below are pictures of my iC piping with yeap, you guess it....OIL! Literally dripping. It was quite the eye opening experience. Shocked.

Next up on my list is OCC.

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elim11 · 06-22-2010, 02:11 AM

I fail at resizing. No clue how to do it. Sorry folks.

ericsmc83 · 06-22-2010, 02:18 AM

How many miles did it take for that? Just asking for reference.

When I did my IC upgrade, there wasn't enough oil to drip like that, but there was definitely a film when you ran your finger around the inside of the endtanks. This was with about 8k miles (3k tuned).

+1 on OCC even for stock.

elim11 · 06-22-2010, 02:29 AM

Quote:

Originally Posted by ericsmc83

How many miles did it take for that? Just asking for reference.

When I did my IC upgrade, there wasn't enough oil to drip like that, but there was definitely a film when you ran your finger around the inside of the endtanks. This was with about 8k miles (3k tuned).

+1 on OCC even for stock.

22k miles/ 2 yrs

opdare01 · 06-22-2010, 03:02 AM

Phew!...put my occ in last week with 9K on my car...should be good still...

cstavaru · 06-22-2010, 04:11 AM

If someone could prove that having an OCC you can avoid that, I would install one. But no one ever showed an OCC with oil in it until now

marcel b · 06-22-2010, 05:18 AM

I put an other FMIC on after 26k KM, so about 16k miles or so, and was as good as clean. The shop doing the install which is very experienced with turbo charged (race) cars said an OCC is not needed at all.
This picture shows however a lot more oil, then I had after the double amount of milage... It would indeed be interesting to see some pics of oil in a catchcan, or IC piping of a car which had oil in it before the OCC and has now driven 10k milage or more with an OCC.

GaryS · 06-22-2010, 06:11 AM

I personally have no idea, but the shop that installed my FMIC and the shop that does all my other upgrades (AtSpeed) both told me an OCC is unnecessary.

enrita · 06-22-2010, 07:07 AM

Quote:

Originally Posted by cstavaru

If someone could prove that having an OCC you can avoid that, I would install one. But no one ever showed an OCC with oil in it until now

there are tons of pictures showing a full OCC. when i emptied my RR occ after 1 year it was almost full.

ar design · 06-22-2010, 07:14 AM

Quote:

Originally Posted by GaryS

I personally have no idea, but the shop that installed my FMIC and the shop that does all my other upgrades (AtSpeed) both told me an OCC is unnecessary.

I just pulled the charge pipe off a 2009 with 4k miles on it - it was literally SOAKED in oil.

a32guy · 06-22-2010, 08:07 AM

Normal for a turbo car, not a big deal. Use a meth kit to keep your valves clean and problem solved.

scottp999 · 06-22-2010, 08:46 AM

Quote:

Originally Posted by GaryS

I personally have no idea, but the shop that installed my FMIC and the shop that does all my other upgrades (AtSpeed) both told me an OCC is unnecessary.

Who said it? Bob?

GaryS · 06-22-2010, 09:10 AM

Quote:

Originally Posted by scottp999

Who said it? Bob?

I asked Rich, the tech who has done most of the work on my car.

dzenno · 06-22-2010, 09:14 AM

OCC will not eliminate all blw by oil in your piping but it will minimize it..I still have oil in my piping after the OCC but it's less than it would've been without it..

scottp999 · 06-22-2010, 09:47 AM

Quote:

Originally Posted by GaryS

I asked Rich, the tech who has done most of the work on my car.

Cool. Rich is great. I'd like to understand his reasoning though. I helped with the FMIC install on my car, and everything was coated in oil. Also checking the OCC lines oil is everywhere. Its obvious the cyclonic oil seperators built into the N54 manifold let a lot of oil pass by.

Rich put my Diff in and did the performance suspension install for me. Great job on both.

dyong · 06-22-2010, 12:33 PM

Quote:

Originally Posted by dzenno

OCC will not eliminate all blw by oil in your piping but it will minimize it..I still have oil in my piping after the OCC but it's less than it would've been without it..

+1. The OCC does not catch all 100% of the oil. When I remove my OEM I/C I still see some traces of oil but not dripping oil of course.

onefastman · 06-22-2010, 12:50 PM

I have a bsh occ and it doesnt seem to be collecting much. Should I put some steel wool in it or something?

opdare01 · 06-22-2010, 02:23 PM

Is it only under high boost conditions where you get a lot of blow-by or is it under normal driving conditions?

kaleb · 06-22-2010, 05:37 PM

Are you serious? That is BARELY any oil.

raceyBMW · 06-22-2010, 06:19 PM

Quote:

Originally Posted by opdare01

Is it only under high boost conditions where you get a lot of blow-by or is it under normal driving conditions?

Under normal driving conditions where you aren't under boost, the blow-by is being routed to the intake manifold directly....its only when you are under boost that the blow-by is routed to the rear turbo inlet pipe.

opdare01 · 06-22-2010, 06:46 PM

I'm sure the catch can is a good precaution because when I installed it, the OEM piping had signs of oil...For $250 i think its a good idea for added longevity...

ModBargains.com · 06-24-2010, 02:18 PM

An oil catch can is definitely recommended for all turbo vehicles! The purpose of a catch can system is to collect/vent the blowby vapors inherent as part of the combustion process. The factory setup sucks these oily vapors directly back into the engine exposing them to everything in their path.

In the short term getting these vapors out of the combustion path reduces knock retard by not allowing oil vapor to mix with the air fuel mixture. In addition the more free flowing lines allow the engine to rev easily giving a more responsive feel to the engine as a whole.

Over the long haul these untended to vapors will build up over the intake valves leading to a host of running issues and an expensive repair bill to fix. With a catch can installed you will save yourself from dealing with this hassle.

The system that has been very popular lately among the community is the BSH Competition Oil Catch Can. I'll shoot you over a PM with more details!

- Alan

06-22-2010, 01:55 AM	#1
elim11 Major 429 Rep 1,325 Posts Drives: e90m3 Join Date: Apr 2008 Location: irvine/sf iTrader: (13)	And this is why you need an OCC People keep preaching the importance of an OCC. How their IC piping is lined with oil, etc. I replaced my IC last week and I finally(unfortunately) could put pictures to that statement. Below are pictures of my iC piping with yeap, you guess it....OIL! Literally dripping. It was quite the eye opening experience. Shocked. Next up on my list is OCC. Last edited by elim11; 06-22-2010 at 02:11 AM..
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06-22-2010, 02:11 AM	#2
elim11 Major 429 Rep 1,325 Posts Drives: e90m3 Join Date: Apr 2008 Location: irvine/sf iTrader: (13)	I fail at resizing. No clue how to do it. Sorry folks.
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06-22-2010, 02:18 AM	#3
ericsmc83 Captain 66 Rep 986 Posts Drives: 08 E92 335i MT Join Date: Sep 2007 Location: Las Vegas, NV iTrader: (9)	How many miles did it take for that? Just asking for reference. When I did my IC upgrade, there wasn't enough oil to drip like that, but there was definitely a film when you ran your finger around the inside of the endtanks. This was with about 8k miles (3k tuned). +1 on OCC even for stock. __________________ 2008 E92 MT \| VTT Stage 2+ 20T \| VTT Inlets \| JB4 MHD E85 \| Fuel-It Stage 3 LPFP w/FPR and Return \| BMS PI \| AR DP \| AE Quad Exhaust \| Helix FMIC \| ER CP \| Tial BOV \| DCI \| AR OCC \| Spec Stage 3+ \| SMFW
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06-22-2010, 03:02 AM	#5
opdare01 Second Lieutenant 19 Rep 295 Posts Drives: 2009 335i E92 AW Join Date: Nov 2009 Location: SoCal iTrader: (2)	Phew!...put my occ in last week with 9K on my car...should be good still... __________________ 2009 335i E92 \| Alpine White \| Black Dakota Leather \| M-Tech Kit \| M3 Lip Spoiler \| BMW Black Grilles \| BMW PE \| Dinan S2\| BSH OCC \| Sport Package \| Premium Package \| Logic7 \| iDrive \| VMR 19" V710 Gunmetal \| Sports Steering Wheel w/ Paddle Shifters \| Tinted Windows \| GP Thunder 8500K V2 Angel Eyes
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06-22-2010, 04:11 AM	#6
cstavaru Brigadier General 328 Rep 3,262 Posts Drives: 2009 335i M Sport Sedan 6MT Join Date: Aug 2008 Location: Bucharest, Romania iTrader: (0)	If someone could prove that having an OCC you can avoid that, I would install one. But no one ever showed an OCC with oil in it until now __________________ Mods(click): Cobb + RB Turbos \| Aquamist HFS-4 Meth \| Drexler LSD \| Bilstein B12 Pro-Kit \| Custom K&N Apollo Intake \| Wagner Intercooler \| Macht Schnell Downpipes \| BMW Performance Power Kit \| BMW Performance Exhaust \| BMW Performance Short Shifter \| M3 Subframe Bushings \|
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06-22-2010, 05:18 AM	#7
marcel b Lieutenant Colonel 137 Rep 1,898 Posts Drives: F31 340i Join Date: Jun 2009 Location: Europe iTrader: (0)	I put an other FMIC on after 26k KM, so about 16k miles or so, and was as good as clean. The shop doing the install which is very experienced with turbo charged (race) cars said an OCC is not needed at all. This picture shows however a lot more oil, then I had after the double amount of milage... It would indeed be interesting to see some pics of oil in a catchcan, or IC piping of a car which had oil in it before the OCC and has now driven 10k milage or more with an OCC.
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06-22-2010, 06:11 AM	#8
GaryS Colonel 39 Rep 2,084 Posts Drives: 2009 135i 6MT Join Date: Feb 2010 Location: Maryland iTrader: (0) Garage List 2009 135i [6.50]	I personally have no idea, but the shop that installed my FMIC and the shop that does all my other upgrades (AtSpeed) both told me an OCC is unnecessary.
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06-22-2010, 08:07 AM	#11
a32guy First Lieutenant 31 Rep 374 Posts Drives: AW 335i Join Date: Dec 2009 Location: CT iTrader: (2)	Normal for a turbo car, not a big deal. Use a meth kit to keep your valves clean and problem solved. __________________
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06-22-2010, 09:14 AM	#14
dzenno Banned 287 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	OCC will not eliminate all blw by oil in your piping but it will minimize it..I still have oil in my piping after the OCC but it's less than it would've been without it..
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06-22-2010, 12:50 PM	#17
onefastman Major General 163 Rep 5,689 Posts Drives: 2009 135i 2011 e92m dct Join Date: Sep 2009 Location: Earth iTrader: (15)	I have a bsh occ and it doesnt seem to be collecting much. Should I put some steel wool in it or something? __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(1addicts.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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06-22-2010, 02:23 PM	#18
opdare01 Second Lieutenant 19 Rep 295 Posts Drives: 2009 335i E92 AW Join Date: Nov 2009 Location: SoCal iTrader: (2)	Is it only under high boost conditions where you get a lot of blow-by or is it under normal driving conditions? __________________ 2009 335i E92 \| Alpine White \| Black Dakota Leather \| M-Tech Kit \| M3 Lip Spoiler \| BMW Black Grilles \| BMW PE \| Dinan S2\| BSH OCC \| Sport Package \| Premium Package \| Logic7 \| iDrive \| VMR 19" V710 Gunmetal \| Sports Steering Wheel w/ Paddle Shifters \| Tinted Windows \| GP Thunder 8500K V2 Angel Eyes
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06-22-2010, 05:37 PM	#19
kaleb First Lieutenant 29 Rep 301 Posts Drives: '12 X5 35d Join Date: May 2008 Location: Dallas, TX iTrader: (0)	Are you serious? That is BARELY any oil. __________________ 2012 X5 35D - Platinum Gray / Cinnamon Options: Sport, Tech, Cold Weather, comfort seats, leather dash, high beam assist, lane-departure warning, soft-close doors, two-row, self-leveling suspension, hi-fi stereo Tracks driven (in any car): Nürburgring Nordschleife (05/2011), LeMans (ok, just the public part), Eagles Canyon Raceway, MotorSport Ranch Cresson, COTA Austin
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06-22-2010, 06:46 PM	#21
opdare01 Second Lieutenant 19 Rep 295 Posts Drives: 2009 335i E92 AW Join Date: Nov 2009 Location: SoCal iTrader: (2)	I'm sure the catch can is a good precaution because when I installed it, the OEM piping had signs of oil...For $250 i think its a good idea for added longevity... __________________ 2009 335i E92 \| Alpine White \| Black Dakota Leather \| M-Tech Kit \| M3 Lip Spoiler \| BMW Black Grilles \| BMW PE \| Dinan S2\| BSH OCC \| Sport Package \| Premium Package \| Logic7 \| iDrive \| VMR 19" V710 Gunmetal \| Sports Steering Wheel w/ Paddle Shifters \| Tinted Windows \| GP Thunder 8500K V2 Angel Eyes
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06-24-2010, 02:18 PM	#22
ModBargains.com Banned 488 Rep 13,582 Posts Drives: JB E92 335i Join Date: Feb 2008 Location: 1721 E. Lambert Rd #C, La Habra, CA 90631 iTrader: (51)	An oil catch can is definitely recommended for all turbo vehicles! The purpose of a catch can system is to collect/vent the blowby vapors inherent as part of the combustion process. The factory setup sucks these oily vapors directly back into the engine exposing them to everything in their path. In the short term getting these vapors out of the combustion path reduces knock retard by not allowing oil vapor to mix with the air fuel mixture. In addition the more free flowing lines allow the engine to rev easily giving a more responsive feel to the engine as a whole. Over the long haul these untended to vapors will build up over the intake valves leading to a host of running issues and an expensive repair bill to fix. With a catch can installed you will save yourself from dealing with this hassle. The system that has been very popular lately among the community is the BSH Competition Oil Catch Can. I'll shoot you over a PM with more details! - Alan
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