Forge Blowoff Valve Leaking Oil?

[Elliot29]

Hello All,

I was checking my oil earlier and it looked like oil had been spilt all over and under the engine cover. I know it wasn't me as I make sure no oil goes anywhere but where its supposed to.

I have the full £200 forge blow off kit fitted and it looks like it is spitting out the holes in that!!

Has anyone else ever experienced this or know why it is doing it?

Thanks in advance!!

 

[splinter26]

Never had any problems with mine when i had it, although i seem to remember someone reporting a similar problem with one a while back. I'll have a browse to see if i can find it!

 

[lucifer666]

The blow off valve only blows what's in there so I would imagine you are getting oil in your turbo intake or the baring seal on your turbo is letting oil by. I would assume the first. If you unplug the pcv pipe leading to the air intake post filter. Stick your finger in there and you'll see a load of oil there. People fit an oil catch can to this pipe to avoid having all that oily air getting to the turbo and subsequently. There's 2 pipes, the large one you should be disconnecting. I have a piece of silicone pipe on the end of mine followed by a tiny filter. I then sealed off the hole.

Pcv vents crank gasses after blowby past piston rings. An oil seperator is there to only allow the gasses to flow bit its not great. So you consume oil. The new breather pipe and oil seperator on the cthe engine on the newer models iliminate this problem but its so as to hide the piston ring deterioration problem as its those that allow blowby to begin with

 

[Ben-ibizaFR]

Phone forge ?

 

[wegi]

Make sure it isn't a cheap knock-off BOV.

https://www.facebook.com/media/set/?set=a.10152529727250394.958266.166492375393&type=1

That's about actuators but could be a similar case.
If it's genuine, phone Forge.

 

[skodapop]

The only way you can get oil out of a BOV is if there is oil in the exhaust manifold, is your car using excessive amounts of oil. There are three ways oil could get in there.
1. Valve stem oil seals
2. Piston Rings
3. Turbo rotor seals.

 

[ibizaracebrake]

I bet you have a cracked piston as this is what I had + excess crank case pressure. I also had cracked turbo. Time for a rebuild.

 

[lucifer666]

Did you also have oil constantly coming through your pcv into your intake.

I was going to send you a message today too asking about your oil cat can connections.

On the n75 valve you have a T shape, the one to the left is boost in from turbo, the one on the bottom is boost let through to the turbo actuator and the one to the right joins the large pcv pipe and then goes into the intake. You bypassed that section but how did you seal thepart where the right pipe joins to the large one.

A pic of your n75 valve would be awesome

 

[Elliot29]

Thanks everybody for the info and suggestions. Ill take another look at the weekend in the pcv pipe to check for oil but i'm guessing there will be some in there. Any pictures of where I should be looking and where I can fit this tiny filter to stop the crank case breather going into the pcv?

 

[Elliot29]

Can I fit something like this?

http://www.ebay.co.uk/itm/Blue-Allo...Parts_SM&fits=Car+Make:VW&hash=item1e7759650a

 

[ibizaracebrake]

Can I fit something like this?

http://www.ebay.co.uk/itm/Blue-Allo...Parts_SM&fits=Car+Make:VW&hash=item1e7759650a

that's the one I have, but in black.

 

[Elliot29]

that's the one I have, but in black.

Brilliant, I've ordered it in black and will have to browse your youtube vids to find where best to put it

Thanks

 

[lucifer666]

I'm bypassing my pcv currently. Made a few mistakes but its working well now. I can give you some pointers if you require.

 

[Elliot29]

Ah cool, any pointers would be brilliant!! Looking at racebrakes vid its not the pipe i thought it was going to be, whoops ...

http://www.youtube.com/watch?v=uzWXoYBICFg&list=UUMpbApuHHfnlVGHDsY2Wc9A&index=7

Any suggestions on where to fit it and what size pipe i need? It comes with 10 & 15mm inlets

 

[lucifer666]

Yeah i made the same mistake before.

Theres 2 pipes.

1. Small pipe that goes through a check valve into the intake post filter

This is actually the breather pipe. Takes air into the crank under suction to replace air forced out through the pcv system.

I get spurts of oil through this when booting it, The preassure was so much it split the pipe, so obviously the pcv system isnt doing its job well enough as its meant to releave the pressure.


2. Large pipe(pcv)

This is the main pipe that releaves crank preassure which goes through a valve.
It splits in 2, one big pipe which goes into intake before throttle and a small that goes straight into manifold.

Depending on the state of boost, it will release into one of these 2 pipes. I imagine its the small pipe under no boost and the large under boost as there will be more blow by gas to release under boost.

But.....theres the waste boost from the n75valve which merges into the main pipe (before it splits in 2)


You cant just bypass one part of the pcv, it has to be all.
So you disconnect the breather from your intake and plug the gap
You run a pipe from the large pcv pipe before the check valve, this runs to the catch can and back to the check valve or you can bypass the check valve and go to your intake
That will still allow the boost from the n75 valve to flow through the check valve and into either of the other tubes.

This will make more sense when you start fiddling

 

[Elliot29]

Awesome thanks for all the info!! Ill have a look at the weekend and report back, thanks again!!

 

[Elliot29]

This is an old pic of my engine bay i've found to work out what im going to do:

When you say disconnect the breather from the intake, which one where? Struggling to work it out haha

 

[lucifer666]

The breather is the tube connected to the forge silicone pipe. Leave the valve on as it stops oil spurting out after booting it

 

[Elliot29]

Ah ok, so bung the silicon forge bit or bung where it goes into the block?

And then fit the catch can on the larger tube to the left before it goes into the check valve?

 

[lucifer666]

The block still needs fresh air in so leave connected to block and seal the silicone pipe or get a piece without a hole . Then you have to do something about the larger pipe.