PCV or "donut" on valve cover

[rodpaslow]

I broke this black round thing on the valve cover that goes to a provent unit - do I need a new round thing or pcv valve, or can I get away with just running a line from the valve cover to the provent 200?

My pcv or round black thing on the valve cover is open, there is no restriction or filter (I don't know if this is correct or someone took the guts out of it).  Is this correct for a 1.6 TD ('91 vintage)?

[vanbcguy]

It's an oil separator - it's job is to reduce the amount of oil coming out of the breather, keeping it in the engine.  You can certainly run a line to the Provent without it, but you're going to end up with more oil in the Provent than you would otherwise.

You can get a new one, but they're kinda expensive for what they are.  Listed at about $40 through the first supplier I checked.  I'd probably do it if it were me though.

[R.O.R-2.0]

It's an oil separator - it's job is to reduce the amount of oil coming out of the breather, keeping it in the engine.  You can certainly run a line to the Provent without it, but you're going to end up with more oil in the Provent than you would otherwise.

You can get a new one, but they're kinda expensive for what they are.  Listed at about $40 through the first supplier I checked.  I'd probably do it if it were me though.

if everyone else is like me, then they should have about 40 of these laying around..

i know i have a TON of them..

i imagine you could find a used one somewhere cheap or free..

[rodpaslow]

Thanks, I'll probably go to the pull-yourself auto wrecker and see if they have any MK2's and pull one off. 

I know I have a spare, but as usual i can't find it...

[bbob203]

anything one can do to reduce the amount of oil going into the intake thru the tube that comes out of that thing going to the intake tube?

[R.O.R-2.0]

anything one can do to reduce the amount of oil going into the intake thru the tube that comes out of that thing going to the intake tube?

catch can anyone?

[billybobf]

isnt that what that funky looking thing is, is a factory catch can?

[R.O.R-2.0]

isnt that what that funky looking thing is, is a factory catch can?

lmao, no..

its an oil vapor separator, thats about it..

it doesnt actually CATCH anything..

[rodpaslow]

I have an older NA (90 1.6) that I use mostly in the winter.  I checked it and it doesn't have one is has a mesh of some kind in the valve cover.  I suppose that why a NA doesn't need this?

[R.O.R-2.0]

I have an older NA (90 1.6) that I use mostly in the winter.  I checked it and it doesn't have one is has a mesh of some kind in the valve cover.  I suppose that why a NA doesn't need this?

it was integrated into the valve cover on the OLD engines..

[Trips_B]

My 86 valve cover also has the mesh inside and came with the pcv to the intake.

I deleted the hose and inline heating element.  Then ran a hose from the pcv to a small breather filter and mounted the breather filter inside my intake cone filter.    kinda ghetto but it works and its inside the fender anyways so it not visable

[bbob203]

does having or deleting pcv have any advantage or disadvantage?

[Trips_B]

does having or deleting pcv have any advantage or disadvantage?

Question:What is the PCV valve and what does it do?

Answer:The blowby vapors that end up in an engine's crankcase contain moisture as well as combustion byproducts and unburned fuel vapors. The crankcase is sealed to prevent the escape of these gases into the atmosphere, but the vapors must be removed to prevent oil contamination that leads to sludge formation. The positive crankcase ventilation (PCV) system siphons these vapors from the crankcase and routes them into the intake manifold so they can be reburned in the engine.
 
I think deleting it ie. "cover/plug the hole" is not a good idea.  However a lot of people will run breather filters and add catch cans for to remove the possibility of oil reaching their intake.

Catch cans like provent 200 seem to be the way to go.  Retaining crankcase ventilation, recurculating fumes and removing the chance of oil getting into your intake.

Running a breather filter on your VC works.  If you dont mind smelling fumes when your windows rolled down on a nice day and cleaning/replacing it on a somewhat regular basis

My .02 cents

[billybobf]

ok, but on a diesel, isnt a little oil in the intake just added fuel and upper cylinder lubricant?

[fatmobile]

The MK3 PCV pucks have a 3rd port for a hose from the front of the block,.. like the AZZs.