Topic: Oil Catch Can question

[Arabas]

i suppose this question applies to all cars, including the kappas.
i am asking not for my GT, coz i already use the DDM OCC, but for another car.

general question is this:

Is the OCC supposed to be placed at approximately the same level with the valve cover (the same level where the hose comes out of the engine) or can it be placed at any height i.e. the middle of the engine or at the bottom of the engine near the oil pan?

thx for your feedback

[shabby]

Good question, never really thought of height as being a factor. But now that you mentioned it i would place it lower than the outlet from the valve cover simply due to gravity, oil won't go up a hose by itself.

[TomatoSoup]

I wouldn't think it matters.  The oil goes in to the top of the can aerosol-ized and is condensed/trapped out in the bottom of the can.  It can't flow back out unless the can fills up, and the airflow will travel through it anyway, unless mounted so high that the length of pipes provide appreciable air resistance (maybe).

Per shabby, if you have liquid oil flowing in the outlet pipe, it doesn't matter if it flows back into the valve cover, you just don't want it getting into the air intake (which is why you have the OCC, to trap it).

[Dr. Gronk]

A couple of car buddies and I were talking about this. Our conclusion is that the hoses can go either up or down but it's important they don't dip (go up then down then up, or down then up then down) as this could cause oil to pool in the line and block the venting.

Other than that going up from the valve cover would allow oil to drain back to the valve cover if it condensed in the line prior to OCC.
On the other hand going down would give you a good idea how much oil is coming from the cover as all the oil would end up in the OCC and you could measure it. This could help indicate if your filling your oil too much for one, maybe other stuff.

that's was our 2 centbeers worth of advice

[TomatoSoup]

A couple of car buddies and I were talking about this. Our conclusion is that the hoses can go either up or down but it's important they don't dip (go up then down then up, or down then up then down) as this could cause oil to pool in the line and block the venting.

Possibly, but there should be enough positive pressure that that pool would get blown out anyway.  If there weren't, you wouldn't need the vent in the first place.  (Again, just my 2beers, and I know nothing!)

[Arabas]

i was thinking that maybe if you have the OCC in the same level as the hose coming out of the valve cover, the flow could be easier for the fumes.
if the OCC were placed down below (i.e. at the level of the oil pan) maybe the flow wouldn't be as good.
thinking of how a typical exhaust is designed, i pressume the gases won't have any problem to go below the level of the vave cover.
probably the fumes will go up again to enter the manifold without any problem.

almost all OCCs i ve seen placed in an engine bay are at the valve cover level and i thought maybe there is some sort of rule. on the other hand, modern engine bays don't have any space available, only some free spots on the far up part of the engine bay, that's why people place them there 

thx for the input!