Oil Catch Can project

[Omerta]

Few comments:
- Catch can will collect alot of moisture during the winter months as it will be the 'cold sink' in this setup acting as a condenser.
- Your hoses are not rated for oil resistance and will swell/degrade at different rates so pay attention to them over time.
- Should pass emissions depending on the amount of oil-vapor carryover there is though the system. The BMW system uses small orifices and a cyclone style separator.
- Too much vacuum could pull combustion gasses past the rings at low load and dissolve away the oil film leading to premature ring wear.

[puddinboo]

-actually the hoses should be fine now as I have changed them to heavy duty hydraulic hoses.
-I was planning on more frequent catch can changes this winter.(I will be keeping a close eye on it.)
-my exhaust right now after the hydro lock is still burning out the old oil from exhaust so probally won`t pass emissions ,but in northern ont we don`t have any testing up here.(I`m not losing oil)
-for pulling combustion gases past the rings ,I don`t mind taking my chances on it ,compared to a totally failed engine. at least now I can keep an eye on it and theres no way oil can get sucked up from the dipstick tube into the intake.

[puddinboo]

the BMW M54 is a different breed of engine though?

[THE VEIN]

I know the m54 is different but I thought all engines no matter what type need to have vacuum to pull out blow-by from the head and block

[puddinboo]

I can`t answer the question as I`m not the designer of this engine, so I don`t know how they work 100%, I know from reading you can`t use a vented catch can as it causes piston ring flutter , and must use a non vented catch can.

[THE VEIN]

Originally Posted by puddinboo

I can`t answer the question as I`m not the designer of this engine, so I don`t know how they work 100%, I know from reading you can`t use a vented catch can as it causes piston ring flutter , and must use a non vented catch can.

I think ring flutter is when the head has more vacuum than the crankcase

[jcp240z]

The block and head are interconnected through the timing chain/belt cavity on most engines. I don't want to say all, since I've not seen all of them. With that said, it is better to remove as close to the source as possible and multiple points have less restrictions.

[THE VEIN]

Ok I saw a video on YouTube and the guy took the line coming off by the vanos and ran that to a catch can and back to the intake manifold

[puddinboo]

reason for me putting catch can on I live in canada where it gets very cold, and even putting a new ccv system in, there is still a possibility of a failure. just because of the hose thats connected to the oil dipstick. If I lived in arizona I wouldn`t even worry about it as much.

[puddinboo]

well were starting to get into the cold weather months and i`m starting to see some water and mayo in the catch can and oil fill cap. reason being is I only drive 15 min to and from work. I might try driving once a month for an hr and half to heat up the engine and get rid of the moisture these engines produce. this weekend coming I will empty my catch can as it is a 1/4 full of water and sludge. by the way I have 207000km on the engine, so about 2000km on the catch can and engine is purring away with no codes .