Oil breather or catcher

[pablo_ni]

this was my pikey effort on my old kitcar.

 

[DrewBear11]

So the way i understand this system is that, theres a pipe from the crankcase back into the intake. And oil/air/vapour flows out of this back into the air intake ??

So if you split this pipe off into a catch tank or to atmosphere, wont it just release all of the oil out like a hole..... Is there any backpressure on the intake side of it to hold the liquid back or anything.

**sorry for being a n00b i just dont understand how this system works at all**

So if you set a catch tank up to collect oil/vapour, do you need to run a pipe back to the intake or will you just block up the connection for the pipe? (on the intake)

 

[bradharding24]

Neither. Just run a pipe from the oil breather vents down the side of the engine to the subframe and out under the car.

Unless youre competing and they check the vapours are correctly vented why waste the weight of the catch tank or the mess of a breather filter?

 

[bradharding24]

So the way i understand this system is that, theres a pipe from the crankcase back into the intake. And oil/air/vapour flows out of this back into the air intake ??

So if you split this pipe off into a catch tank or to atmosphere, wont it just release all of the oil out like a hole..... Is there any backpressure on the intake side of it to hold the liquid back or anything.

**sorry for being a n00b i just dont understand how this system works at all**

So if you set a catch tank up to collect oil/vapour, do you need to run a pipe back to the intake or will you just block up the connection for the pipe? (on the intake)

You either run a pipe out and under the car and forget about it, or you fit a filter and let the vapour evapourate in the engine bay. If you have a lot of vapour it might accululate in the catch tank, but it depends on the engine and how its used.

Ive seen rally cars with nescafe tins collecting the vapours before. Ther is no need to spend hundreds on alloy catch tanks.