M30 Catch Can?

[SteveMD]

Has anyone fitted one to the M30 or seen a need for one? When I pulled my M30 intake, it was horribly gunked up. To be fair that was probably 300k miles of gunk. No reflection on previous owners as it was well maintained.

Thanks,
steve

[ross1]

Catch can? You could rig an oil seperator into the crankcase vent but why?
300k worth of blowby will do this, don't worry about it. Clean it up and carry on.

[ZenitramNaes]

I'm also interested in this! Mine seems to get gunked up pretty quick.

[SteveMD]

I'm also interested in this! Mine seems to get gunked up pretty quick.

Having seen how much oil gets into the intake piping of turbo cars I have owned, that might be a good idea for your car.


Catch can? You could rig an oil seperator into the crankcase vent but why?
300k worth of blowby will do this, don't worry about it. Clean it up and carry on.

Makes sense, will do. Thanks, Ross.

[ZenitramNaes]

Having seen how much oil gets into the intake piping of turbo cars I have owned, that might be a good idea for your car.

Yeahhhhh, I should get on that. I've seen a breather on an M30, but never a catch can setup. Hopefully someone will chime in.

[LouieD]

Here's our homemade set up on my son's e28/m50 car. It's still in the "development" stage...

It's a simple hardware store materials can, sealed internally and baffled. Oil heavy fumes come into one of the two top fittings, the vapor hits the internal baffle and the liquid oil is drawn to the bottom by vacuum. At the bottom there is another fitting that is connected to the dipstick tube which by gravity and vacuum should draw the oil back into the crank case. The other top fitting (on the other side of the baffle) is connected to the intake to draw the vapors back in for combustion. The baffle has an air gap at the bottom. The oil will be too heavy to be drawn back up, but the vapors should flow freely out to the intake. I used a power steering reservoir bracket to mount it, so it looks pretty clean when installed.

This should help minimize the oil that puddles behind the throttle body.

http://i338.photobucket.com/albums/n424/SoCal_LouieD/e28%20build/catchcan2_zps72db1529.jpg

Mounted just above the frame rail with room for the hoses.

http://i338.photobucket.com/albums/n424/SoCal_LouieD/e28%20build/catchcanmounted_zps2a3821f3.jpg

A couple of pics of the modified dip stick tube.

http://i338.photobucket.com/albums/n424/SoCal_LouieD/e28%20build/dipsticktube1_zps95e92626.jpg

and the tube installed

http://i338.photobucket.com/albums/n424/SoCal_LouieD/e28%20build/dipsticktube2_zpsf1251c82.jpg

[MehMan]

Hmm, I'm thinking of a catch can install on my car, with either a modified oil tube or one from an E39.

Does anybody know if it'd fit?

[TylerP]

How difficult was it to remove the dipstick tube? I know on my Audi it was a pain in the ass that required 6 hours of heat and vise grips.

[CO535i]

Wrote this in a thread in the F.I. section:

I purchased the Vibrant E-Vac for the crankcase/valvecover breather:


http://vibrantperformance.com/catalog/images/1189_WEBL.jpg

Welded the bung after the cat converter on the TCD exhaust. This will pull vacuum using the exhaust flow. Put a 10-AN fitting on the valve cover port and on on the end of the EVac. Purchased -10 heat/oil/etc resistant vacuum hose from Summit to complete the route. The hose is not connected at all to the turbo charge tubing.

I have a Mann Provent CCV filter similar to the catch can pictured above from another build that I may add to this setup if there is too much of a smokescreen going on. The Mann Provent has an internal replaceable filter.

[bmwwheelman]

So instead of catching the oil, just fire it out your exhaust in into the poor guy behind you?

[CO535i]

So instead of catching the oil, just fire it out your exhaust in into the poor guy behind you?

Hardly "firing oil" at the guy behind you given that what is (should be ) being pulled out of the CCV port is a slight mist of oil which is then burned in the hot exhaust.

If someone is pissing that much oil out of the muffler using this set up they have more serious issues that can't be resolved with a simple catch can.

[gtopaul]

Hardly "firing oil" at the guy behind you given that what is (should be ) being pulled out of the CCV port is a slight mist of oil which is then burned in the hot exhaust.

= smoke