Engine guru carbon question

**mrntd** · 01-21-2013, 12:23 PM

The carbon build up of the valves is a result of the crank venting oil into the intake. Our solution has been a can to collect it.

It use to be vented to atmo but the epa said nay nay. So now the mfg decided to burn it. Not sure that's an improvement but that's a different discussion.

Why not just drain it back into the pan? It doesn't mess up the valves, it isn't burned, and it doesn't go into atmo.

**Crashton** · 01-21-2013, 01:06 PM

My guess is all that vapor would not do the oil any favors or anything that oil lubricated. Not a guru & don't play one on TV.

**mrntd** · 01-21-2013, 01:21 PM

The vapor is oil and it should be any different than the oil that is circulated into and drained from the head.

**Metalman** · 01-21-2013, 01:39 PM

Depends how you drain it back.

If you connect the PCV hose directly back to the oil drain pan... Expect to have blown seals and leaky gaskets...

If you are thinking of draining the collected liquid from the catch can back to the oil pan... That would work... Some models of BMW work this way...

An oil catch can operates on the principle of phase separation. Liquid from the gasses.... The gasses get burned through the intake. The liquid (oil) gets collected. It all boils down to how efficient the separation is... As to how much oil vapor gets to the valves...
None of the OCC are 100% effective... You can only expect to slow the buildup down....

**Jason Montague** · 01-21-2013, 02:21 PM

Quote:

Originally Posted by Metalman

An oil catch can operates on the principle of phase separation. Liquid from the gasses.... The gasses get burned through the intake. The liquid (oil) gets collected. It all boils down to how efficient the separation is... As to how much oil vapor gets to the valves...
None of the OCC are 100% effective... You can only expect to slow the buildup down....

I'm shocked absolutely shocked that Metalman is recommending an OCC. Next thing you know he'll be recommending Seafoam and sporting lip stick,nail polish, and stilletto heels.

:lol :

Jason
My Margi(08 BRG R56 MCS/JCWm) has had a BSH OCC and BSH Dual Port for ~30kmi now and while extrolling their virtues I have had to engage in several sparring matches with Metalman and Crashton. AMAZING

DneprDave · 01-21-2013, 02:23 PM

The main reason for Crankcase Ventilation is to give blow by gasses a place to go. Piston rings don't seal perfectly, so there will always be blow by. Without crankcase ventilation, the crankcase would pressurize and, as Metalman said, blow your seals and make your gaskets leak. The oil mist from the crankcase gets carried along with the blow by gasses, and it ends up on the ground, in the case of a draft tube crankcase ventilator, or is burned by the engine in modern cars with a Positive Crankcase Ventilation system.

Volvos also have a factory oil catch can that drains the oil back to the crankcase.

Dave

**Metalman** · 01-21-2013, 03:06 PM

JM....
I have no clue where you get your info... Have never been against OCC...

However.... Swampfoam is a waste of time and money if you think it will remove baked on carbon on the valves....

Still waiting for pictures of before and after SF treatment...

As far as lipstick and stilettos, well I'll let you corner the market on those items. ...

**Jason Montague** · 01-21-2013, 04:00 PM

Quote:

Originally Posted by Metalman

JM....
I have no clue where you get your info... Have never been against OCC...

However.... Swampfoam is a waste of time and money if you think it will remove baked on carbon on the valves....

Still waiting for pictures of before and after SF treatment...

As far as lipstick and stilettos, well I'll let you corner the market on those items. ...

See Thread-'Possible Fix For Carbon Issue On 2nd Gen S And JCW'.
Post #10. I'm really not trying to start a fight but, over time, your opinion has changed somewhat concerning OCC. That's a good thing and every one here values your opinion. As far as the rest goes...........laughter is good for the heart.

(I just went and checked my meds and I did forget to take my 'Aricept' and Viagra' this morning so that's why I can't even remember who in the **** I am today.)

Jason

Jason

**Metalman** · 01-21-2013, 04:29 PM

^^^ You make no sense... But I still consider you a funny guy....

**mrntd** · 01-21-2013, 05:59 PM

Okay so Volvo and maybe BMW are already doing what I thought of. I am surprised that with more new DI designs coming out, and this is a problem that effects all of them, that the engineers haven't integrated this into the design.

Chuck, do you think a good oil air separator like they use on a compressor would do the job? I'm not adding it on just thinking out loud.