Catch Can Oil Drain

[2BNVS]

i have a catch can, with a return drain piece at the bottom. it is custom made on the passenger side up the back. i heard it is not possible to plumb it to the turbo oil return as there is pressure. is there a way around it keeping the can on that side. i was told to go to the dipstick but its on the other side as you would know

Cheers...Ben.

[Beer Baron]

do you really need to return it to anywhere? I am not personally keen on returning catch tank stuff into my sump. it's usually watery/fuelly/oily stuff and aside from that there is usually bugger all in there. I empty mine about once a year and bugger all is in there.

you can T it into the turbo oil drain but it can be a bad idea as you most certainly don't want anything to fk that up as your turbo will quickly get fked if the oil drain gets blocked.

other than that you can drill and tap and put a fitting into the top of the sump and return it there but personally I'd just block it up and leave it.

[dano4127]

drain it to your exhaust so if you fill your catch tank you back off when you see the plume of smoke

[R31Nismoid]

If the motor is in any reasonable condition it shouldn't be breathing that much anyway.

If you fill a small can in more than a month you've got some real issues.

Do you have proper baffling inside the can etc etc?

otherwise just a 'tin', there is no point having it drain back. Need to filter it first.

[MBS206]

Mine will breath 800ML of oil within about ooo... 130KMs of street driving...

Yes, sump is well and truly topped up because I'd been at the track, and NO, I don't have any external (Including the factory) drains hooked up... These are my issues...

[scotty nm35]

I ran a hose from the bottom of mine, fitted a ball valve on the end and cable tied it near the oil filter so I can drain it while im changing the oil. I only ever find clear water in it.

[2BNVS]

spose i dont really need to drain it, never had issues with the previous motor just thought it may have been beneficial to do so. saves me money on braided lines and fittings lol

cheers guys

ben

[r33_racer]

Nothing wrong with returning it back to the sump. It will constantly be doing a loop...no problem.

[R31Nismoid]

You don't even know if a catch can is beneficial, yet you can make wild claims about motor builds?

... lol.

[2BNVS]

Ash: Was that directed to me? if it was, of course i think a catch can is beneficial thats why ive always had one. i just wasnt sure if it was better to have it draining back to the motor or not, as some friends have completely sealed up catch cans with the drain back to sump, and some have VTA ones with no drain.

I Dont get the claims about motor builds though, im not an engine builder i just get the feedback from a few very well respected engine builders who are on these forums.

Ben...

Edited November 25, 2009 by 2BNVS

[STATUS]

If the motor is in any reasonable condition it shouldn't be breathing that much anyway.

If you fill a small can in more than a month you've got some real issues.

Do you have proper baffling inside the can etc etc?

otherwise just a 'tin', there is no point having it drain back. Need to filter it first.

agreed.

[2BNVS]

Yep true true, my previous set up was fine. but decided to go more all out with a new motor, havent started it yet. so i just thought id ask while things were still being finished off.

Cheers mate...Ben

[STATUS]

The issue with drain back systems is water contamination (read BEER BARONS post)

Overnight or over any period of time that the engine cools down condensation builds in the vents and lines (much like your exhaust), this vapor will also collect in the catch tank.... which then later drains into the sump... bad idea.

[r33_racer]

Yeh thats what i thought was the case also with condensation and whatnot...but havent seen or heard of anyone having any dramas with that setup. Especially if oil is changed at correct intervals. Ill be setting my road car up like this once i sort out some new mods(atm no catchcan just lines running to ground). Breather from crankcase inlet side to catchcan, and drain to sump from exhaust side.

I have seen this setup before and there appears to have been no dramas with it.