[AU335i]

sorry to be ignorant, but what exactly does a catch can do? and is it pretty easy to install? I see alot of members running them and I may have to pick one up myself.

[marv85]

Originally Posted by AU335i

sorry to be ignorant, but what exactly does a catch can do? and is it pretty easy to install? I see alot of members running them and I may have to pick one up myself.

The goal behind an oil catch can is to catch oil and place it in a can

Why we run it? well because blow by oil, which is more significant in some cars than others, will end up in the combustion chamber and will cause carbon build up. The higher boost you run the more blow by you'll have. The circuit to which we install the catch can is the WOT circuit btw.

it will slow down the carbon build up process but not eliminate it.

After a lot of research I've opted for the BMS one. I haven't checked it to see the oil it caught if any. Big Tom's OCC caught a decent amount.

[BT#2]

I took a pic on the in and outlet today.

...and the outlet is COMPLETELY DRY, which proves that this OCC works unbelievable good!
This is what it looked like when I took it out from the car:


BMS OCC:




BSH OCC:

[Mike@N54Tuning.com]

Originally Posted by BT#2

I took a pic on the in and outlet today.

...and the outlet is COMPLETELY DRY, which proves that this OCC works unbelievable good!
This is what it looked like when I took it out from the car:


BMS OCC:




BSH OCC:

Wow... Well they say a pic is worth a thousand words so no need for any more comment on my part

Mike

[WEEZAR]

So would it work and be beneficial on a 335d?

[Joshboody]

checked mine the other day and I have a couple drops of oil in 4k miles... just means my oil separators are kick ass compared to others. Also when I cleaned my valves at 65k it was basically unnecessary. I feel fortunate.

[BT#2]

Originally Posted by Joshboody

checked mine the other day and I have a couple drops of oil in 4k miles... just means my oil separators are kick ass compared to others. Also when I cleaned my valves at 65k it was basically unnecessary. I feel fortunate.

One reason that my OCC captures more oil could be that I've choose'd to modify the bracket and lower the OCC, to be able to get the gravity feed working 100%.

The OCC is now in the lowest position in the system and all the oil runs into the OCC instead of going back to the crankcase.

[itbettergofast]

One of my fav mods.

[Mike@N54Tuning.com]

Originally Posted by BT#2

One reason that my OCC captures more oil could be that I've choose'd to modify the bracket and lower the OCC, to be able to get the gravity feed working 100%.

The OCC is now in the lowest position in the system and all the oil runs into the OCC instead of going back to the crankcase.

Thanks for posting the pic..

Mike

[import36]

Originally Posted by BT#2

One reason that my OCC captures more oil could be that I've choose'd to modify the bracket and lower the OCC, to be able to get the gravity feed working 100%.

The OCC is now in the lowest position in the system and all the oil runs into the OCC instead of going back to the crankcase.

interesting. the way you have it mounted probably has a lot to do with the amount of oil your catching. Big T...approx. how many miles do you drive in a month?

[nafoo]

Quick question about the U bend going upwards. Wouldn't some of the oil that builds up on the U bend area go back towards the opening due to gravity? Is this going to cause any problems with any oil blow by that isn't able to go all the way up?

I already have my BMS OCC in my backseat waiting to be installed, but was just wondering when I saw the instructions and this picture.

[ianthegreat]

Originally Posted by nafoo

Quick question about the U bend going upwards. Wouldn't some of the oil that builds up on the U bend area go back towards the opening due to gravity? Is this going to cause any problems with any oil blow by that isn't able to go all the way up?

I already have my BMS OCC in my backseat waiting to be installed, but was just wondering when I saw the instructions and this picture.

You're probably working with the highest amount of pressure at that point which, in my non-engineering head, would push the oil past that point. But interesting question nonetheless.

[BT#2]

Originally Posted by nafoo

Quick question about the U bend going upwards. Wouldn't some of the oil that builds up on the U bend area go back towards the opening due to gravity? Is this going to cause any problems with any oil blow by that isn't able to go all the way up?

No, it's vice versa.

The oil is traveling from the crankcase to the intake, which means that the oil will have to climb an uphill in the last part of the system. (And therefore be forced to the OCC)

I think this explains it quite good:

[vereak82]

My car smoked at idle after hard rums and cold starts at times after installing this occ I'm more then happy and smoke free three weeks and counting!

[Mike@N54Tuning.com]

Originally Posted by vereak82

My car smoked at idle after hard rums and cold starts at times after installing this occ I'm more then happy and smoke free three weeks and counting!

Thats great to here

I think for the price its one of the better non performance (hp gaining) mods to do..

Mike

[nafoo]

Originally Posted by BT#2

No, it's vice versa.

The oil is traveling from the crankcase to the intake, which means that the oil will have to climb an uphill in the last part of the system. (And therefore be forced to the OCC)

I think this explains it quite good:

Ahh, ok.

[import36]

BT beat me to it....the tube with the U-bend is the outlet on the can. the inlet point on the can actually sits lower than where it connects at the crankcase, which is what Tom was referring to with regard to gravity pulling the oil towards the can.

[Fedie]

Awesome service Mike, we as Canadians some time find that getting part for our cars can be a bit complicated. There is always customs, duties, additional shipping charges, etc. Some vendors, such as Tiago@vrsf, have helped me in the past to avoid unnecessary cost but n54tuning it is THE best so far. I've ordered a catch can on wednesday around 11:00 pm eastern and the catch can just arrived in my home. I live about 50 km west of Toronto.

Thank you for an unbelievable service

Fed

[Irishace]

I still can't believe Big Tom got banned from here. This place is really starting to get unreal. Thanks for the pics BT#2, appreciate it.

[Tzu]

Fedie, thats because Mike is Toronto based. But I concur, great service.

[michaelalex17]

is the only advantage to this to have less carbon buildup? or does it keep other stuff running better?

[nodleecyrb]

Originally Posted by Irishace

I still can't believe Big Tom got banned from here. This place is really starting to get unreal. Thanks for the pics BT#2, appreciate it.

x9999999999