VWDiesel.net The IDI, TDI, and mTDI source.

General Information => General => Topic started by: stewardc on April 27, 2007, 10:35:53 am

Title: CCV Filter?
Post by: stewardc on April 27, 2007, 10:35:53 am

I am looking for a nice, efficient and cheap filter to filter the oil out of the crankcase ventillation system. What is everyone running?

Title: CCV Filter?
Post by: stewardc on April 30, 2007, 08:51:31 am

Bump anyone ??

Title: CCV Filter?
Post by: BlackTieTD on April 30, 2007, 08:56:15 am

are you venting to atmosphere or trying to filter out oil vapour to keep it out of the intake?

i've seen steel wool in some type of case used to get the oil to pool and collect it doesn't go into the intake.

if you are venting to atmosphere, there are little breather filters you can get but i've always been a little leary of those... don't want to overpressurize......  :?

when i've vented cars to atmosphere before i've just used a piece of clean cloth over the opening to keep crap out, so there is no risk of overpressurization.

Title: CCV Filter?
Post by: stewardc on April 30, 2007, 09:29:57 am

I'd like to vent back into the intake, but keep oil out of the intake tract.

Title: CCV Filter?
Post by: burn_your_money on April 30, 2007, 09:35:05 am

My brother has something similar hooked up on his gas chevette. It's simply a bottle with a mesh filter in it hooked up inline with the CCV hose, he bought it at c-tire IIRC

Title: CCV Filter?
Post by: BlackTieTD on April 30, 2007, 09:42:31 am

then you can rig something up with stainless steel wool. it will make the oil vapour pool up into a liquid.

Title: CCV Filter?
Post by: rubadubdub on May 02, 2007, 06:27:33 am

im sure i've read posts on here about this. From memory all the ones ive read about were just metal cans or tubes with 2 pipes, one from head other to air intake, maybe with steel wool in the tank to catch the oil.

Maybe try searching for 'runaway' as i think thats what the homemade CCV  were trying to solve.

Title: CCV Filter?
Post by: jimfoo on May 02, 2007, 07:30:49 am

Guess that's something I'd never have to worry about with an oil bath air filter, unless I tipped on my side. Oh wait, I've done that before. :shock:

Title: CCV Filter?
Post by: saurkraut on May 02, 2007, 08:17:53 am

http://www.parker.com/EAD/displayCatalog.asp?menu_parkerid=46&menu_gid=3&menu_divid=109&catid=9869&catdesc=CRANKCASE%20VENTILATION%20SYSTEMS

Title: CCV Filter?
Post by: RabbitJockey on May 02, 2007, 09:31:42 am

why not just vent to the atmosphere?

Title: CCV Filter?
Post by: Kudagra on May 02, 2007, 06:58:11 pm

Quote from: "Trev0rbr"

why not just vent to the atmosphere?

Sure...and it keeps the rust away too!!

Title: CCV Filter?
Post by: saurkraut on May 03, 2007, 09:47:45 am

Environmental stuff aside, there is a performance benifit to run the crank case at a pressure slightly below atmospheric pressure.

I forgot where i read it, and I don't remember how much the bennifit is.

If you look at both the TD and NA intakes, they both look some what restrictive.  I suspect the VW engineers designed them this way for that purpose.  And if you've ever held a finger over the crank case vent, even on a good engine, there is positive pressure.  Perhaps the intake restriction is made up by the crank case blow by.

So by tossing our stock aircleaners for a "free flowing" design, or venting our crank cases to atmosphere, are we losing something?

Environmental stuff aside.

Title: CCV Filter?
Post by: Kudagra on May 03, 2007, 10:31:58 am

When you get into high end drag racing stuff alot of people use Vacuum pumps to put negative atmospheres on the crankcase. All that does is take the atomized oil vapor out of the way of the crank and the pressure from the bottem side of the pistons. On our engines I dont think you would notice a bit even on a dyno.

Best to just use a catch can.

Title: CCV Filter?
Post by: saurkraut on May 03, 2007, 11:07:50 am

So people that live and die by maximum HP will give up some to run a vacuum pump?

Make you wonder, don't it?

The thing I recall is it helped the rings seal better too.

Watch that catch can in the winter.  There is water in the blow by too.  If she ices up and plugs, you'll be blowing seals in short order.

Title: CCV Filter?
Post by: insdtanoodles on May 03, 2007, 06:19:35 pm

Quote from: "saurkraut"

So people that live and die by maximum HP will give up some to run a vacuum pump?

Make you wonder, don't it?

The thing I recall is it helped the rings seal better too.

Watch that catch can in the winter.  There is water in the blow by too.  If she ices up and plugs, you'll be blowing seals in short order.

that is exactly what happened to me, didnt blow out any seals but the whole catch can for the oil was frozen solid. Looking for an alternative right now but I dont really want to vent into the atmosphere because it is not good for the environment.

Title: CCV Filter?
Post by: jtanguay on May 03, 2007, 11:48:53 pm

i like the way that the 1.9's and TDI's work... they have a hose running from the vent to the bottom of the block which would eventually flow into the sump.  and another hose that is higher that flows back to the intake.

with some steel wool in that area (rig up something) you should be able to make the oil go back into the pan.. you could easily rig something like this up on the older 1.6's with some oil pan modifications...