PVC system problem.

[ristokru]

Now i really need help from smarter guys.
I have mu pvc system oili and need to change parts BUT as i look drawings of PVC system then im confused. I followed lines and looks I have in my 3B two seperate lines. From aby and 3B.
I have marked 2 breater lines in different colour what i have in my car.
Can someone help to explain why this system is made like that or what i need to make different?

[Greg_S]

The routing diagram on the ABY for the pcv system in this post should help https://www.s2forum.com/forum/member...n-hose-routing

[ristokru]

Thank you for helping but it didint help. I still dont understand why my system is made like that? I need to change piping but i Cant AS mine is made both Aby and 3B together.

[newsh]

Both the 3B and the ABY have two lines going up to the back of the head.
On the 3B the smaller one from the big PCV valve goes to the cam cover and the larger one from the inlet manifold via the small one way valve goes to the metal pipe which goes round to the MAF hose.
On the ABY it’s basically the same but the metal pipe to the MAF hose is hidden inside the cam cover.

[newsh]

It looks like on your car someone changed the 3B lower rubber hose from the crankcase to a modified ABY one.
This is not surprising as these hoses on the 3B always fall apart. I made some metal replacements for some of us a few years back.

[s2driveruk]

It looks like on your car someone changed the 3B lower rubber hose from the crankcase to a modified ABY one.
This is not surprising as these hoses on the 3B always fall apart. I made some metal replacements for some of us a few years back.

Still going strong in my 3b John

[ristokru]

Both the 3B and the ABY have two lines going up to the back of the head.
On the 3B the smaller one from the big PCV valve goes to the cam cover and the larger one from the inlet manifold via the small one way valve goes to the metal pipe which goes round to the MAF hose.
On the ABY it’s basically the same but the metal pipe to the MAF hose is hidden inside the cam cover.

Thank you for helping! Need to sort out this fast as my car still cant move because of those leakes I think those boken pipes may have been my problem for boost not going to1,5bar and too rich cold start.

You mentioned that 3B has big PCV valve. Dont they have PCV all the same for 3B,ABY,AAN?
It looks that my beggest problem is this Tree hose. Is it possible to get this new one or is there some better solutions for deleting this tree or better hoses. Looks like one hose of mine has melted and now its also melting coolant hose top of it.

[newsh]

Yes They all have 2 valves.
In your pic
The “big” one 4A
And the small one-way valve number 6

Part 1A is the one that always rots away and is difficult to find, you can make something with a T piece and adapters to replace it.
I think the part I made was approximately 25mm to 20mm with an 8mm tee off to the cam cover.

To simplify your car.
From back of cam cover run an 8 mm hose to a catch can.
Crankcase 20 (or 25?) mm hose to the catch can
Remove everything else and block the vacuum connection under the Inlet Manifold and the connection to the MAF hose.

This will stop you getting oil from the breather dragged into the inlet and filling the intercooler with slime.

Vent the can to atmosphere.
Leave the carbon can electric valve plugged in so you don’t get a fault code.

[ristokru]

Yes They all have 2 valves.
In your pic
The “big” one 4A This i can buy new.
And the small one-way valve number 6 This i can buy new.

Part 1A is the one that always rots away and is difficult to find, you can make something with a T piece and adapters to replace it.
I think the part I made was approximately 25mm to 20mm with an 8mm tee off to the cam cover.
Part 1A is made like it seems with metal pipe from ABY. Rottejn psc is part 1B. I cant find this part nowhere even from Roose motorsport.

To simplify your car.
From back of cam cover run an 8 mm hose to a catch can.
Crankcase 20 (or 25?) mm hose to the catch can
Remove everything else and block the vacuum connection under the Inlet Manifold and the connection to the MAF hose.

This will stop you getting oil from the breather dragged into the inlet and filling the intercooler with slime.

Vent the can to atmosphere.
Leave the carbon can electric valve plugged in so you don’t get a fault code.

Any place to buy Catch can kit for EU cars?

[LHD_Kid]

You can get a full 3B PCV hose set from Roose.....

[ristokru]

You can get a full 3B PCV hose set from Roose.....

You mean this one? Can you install with that also fire traps? All this will cost about 240€.
Maybe its now smarter to buy catch tank?

[newsh]

Here you can see my catch can on the right
1 Hose from back of cam cover along strut brace
2 Hose up from crankcase ( plumbing fitting
3 Hose down to air under car.

Easy

[newsh]

25-20mm adapter ( measure the exact size, there’s a pic on here somewhere with measurements

[ristokru]

Hi,

thank you for pics and info.

I am racing in winter also. I have seen that if you race in winter tracks then those catch tanks are not good as it will make contensate(water). Is this right?

From your pictures. Where goes the top hose? to air or is this cranckcase hose? At beginning you dont have this outlet, so you have made it byself?

[newsh]

Yes the big hose on top goes to the CC
The hose i used is 19mm so I had to make an adapter to 25mm at the CC
The connection on top of the tank is made from a plumbing fitting (copper elbow and compression fitting)

If you can put the catch tank above the turbo it will keep it warm.

Otherwise I guess you could buy the PCV hose kit from Roose