6 replies to this topic

[Java_Green]

I am planning to lead the ventilation into a catch tank including a oil separating filter. From there into the intake (sub atmospheric pressure) via a PCV-valve. My intension is to have a vented timing gear cover together with a vented clutch housing and rocker cover (maybe restricted), through Y-connections, with a vented oil filler cap (intake).
The question is how do I get a proper working crank case ventilation and do I need to balance it (steel wool/smaller hole/opened)?

[Davidmt]

Watching with interest as I received my car with both engine breathers just vented to atmosphere and the HiF44 port blocked off.

The atmospheric vents were just hoses to the bottom of the engine. The Mini is on a car ramp and don't want oil dripping on the car below!

I would rather at least vent back to the carb or tidy up the hoses somehow.

[nicklouse]

So what is wrong with the oil separators on the car now?

[Java_Green]

So what is wrong with the oil separators on the car now?

It is a new engine being built so none of this evaluated yet. I do not know the status inside the existing steel wool one on the timing chain cover, the one on the clutch housing will most likely be a fabricated one (without steel wool) and there is no separator on the vented valve covers.

[mini13]

venting to a vacuum is a good idea, mini's leak enough at the best of times and  anything to counter that is good....

the original valve used to connect to the inlet manifod, the crank case, and the air filter pipe, so at part throttle the manifold would suck vacuum on the carank case, when it came on boost the valve would switch over so the suction on the turbo inlet against the filter would suck on the crank case,

ive vent to the catch can, and then stiock it through one of those 3 way PCV Emission valves.

the valve is NLA, but similar valves were used on the RSturbo, and i think the same valve on the coseworths....

https://www.burtonpo...els-yb0228.html

https://www.burtonpo...vh-6141135.html

 

 

[lsto]

Just stealing this thread instead of creating a new one.
I currently run a daily low boost 998 turbo which just has a tappet cover breather with a k&n vent filter on.
I don't have a problem with the engine breathing but ideally I'd like to run the breather into the intake and make use of the vacuum to help prevent future oil leaks.
I'm thinking of just teeing the breather into the base of my air filter as they are next to each other anyway, that way it should be under constant vacuum as it's before the turbo then I'll just fit a fresh vented cap.
Does anyone see anyway this would be detrimental to my engine, or performance. It's not a fire breathing monster, just a low boost daily.

[Steve220]

Just stealing this thread instead of creating a new one.
I currently run a daily low boost 998 turbo which just has a tappet cover breather with a k&n vent filter on.
I don't have a problem with the engine breathing but ideally I'd like to run the breather into the intake and make use of the vacuum to help prevent future oil leaks.
I'm thinking of just teeing the breather into the base of my air filter as they are next to each other anyway, that way it should be under constant vacuum as it's before the turbo then I'll just fit a fresh vented cap.
Does anyone see anyway this would be detrimental to my engine, or performance. It's not a fire breathing monster, just a low boost daily.

I wouldn't run it to the inlet manifold on a boosted engine unless you need compliance to do so. Oil vapour will lower the octane rating of the fuel entering the engine and potentially cause detonation. Vent the crank case via the outlet on top of the transfer case and/or the timing chain cover.