How to plumb in oil catch tank

Cupra Gsy

Active Member
Jul 13, 2008
200
0
I brought a oil catch tank off a member on here but he aint on line and i want to plumb it in a bit later on so can anyone help me in where it goes
 

Reuvers

I is a Dutch man!
Oct 30, 2007
3,374
0
Netherlands
where did you bring it? :cartman:

kidding mate...you plumb one nipple of the catch tank on the y piece which is against the right side of the block under charge pipe, when standing infront of bay.
The Y piece is held onto the block with 1 screw. Note, when you undo that you're also undoing a hose where your collant flows through (i didn;t know that before lol)

then follow that Y piece, where it comes to the front of the block under your inlet.

This is where I would strongly suggest you to take inlet manni off.


ok, so you follow the Y piece (hard plastic pipe btw) until you get to a rubber hose, which T's off. on the one side the plastic pipe will continue, and the other side T's up to the underside of your inlet. If you took inlet off it will be the (i think) the 8mm hose plugged on the nipple of underside of inlet.

So you need the cut/pull the rubber hose out between the 2 plastic pipes.

Then you put a bung in the 8mm hose off bottom of inlet.

Then you're left with 1 straight bit of plastic pipe going to the Y piece, with a gap where you cut the hose away.

Stick a replacing straight bit of hose between that.

Then place a 19mm hose on the other nipple of the catch tank and job done. This hose will vent the oil fumes away, much like sticking a breather on it would

hope this is understandable lol
 
Last edited:

p34ch3y

tastefully modified
Oct 17, 2005
2,879
1
cambs
Reuvers did you get a new gasket or anything when you took off the inlet to remove the PCV valve?

gasket???????????

where the pcv valve is removed from you just join it..and then block the hose that comes of the manifold or like me use that outlet then for purely the dv line only [B)]:funk:
 

kyle'87

Modding Disease
Sep 15, 2008
868
0
Ruislip
gasket???????????

where the pcv valve is removed from you just join it..and then block the hose that comes of the manifold or like me use that outlet then for purely the dv line only [B)]:funk:

I mean when he actually removed the inlet from the engine so he could access the PCV valve with more ease.

The bold part confused me :lol: Im still new to cupra engines and only know of the two nipples to the far left on the underside of the inlet mani and the one in the center on the underside of the inlet that the pcv valve is connected to

EDIT: I realise what you are talking about now :lol:
 

Reuvers

I is a Dutch man!
Oct 30, 2007
3,374
0
Netherlands
Kyle,
I removed my inlet a few months back to polish (or get started on it lol) and I bought a new gasket.
This gasket was still in perfect nick, so I didn;t buy a new one.

If you've never removed it before get a new gasket. They cost peanuts and is never bad to replace a gasket.
 

kyle'87

Modding Disease
Sep 15, 2008
868
0
Ruislip
Kyle,
I removed my inlet a few months back to polish (or get started on it lol) and I bought a new gasket.
This gasket was still in perfect nick, so I didn;t buy a new one.

If you've never removed it before get a new gasket. They cost peanuts and is never bad to replace a gasket.

cheers dude :thumbup:
 

__B3NNY__

OEM with a 'Twist'
May 5, 2005
3,449
1
Oxford
where did you bring it? :cartman:

kidding mate...you plumb one nipple of the catch tank on the y piece which is against the right side of the block under charge pipe, when standing infront of bay.
The Y piece is held onto the block with 1 screw. Note, when you undo that you're also undoing a hose where your collant flows through (i didn;t know that before lol)

then follow that Y piece, where it comes to the front of the block under your inlet.

This is where I would strongly suggest you to take inlet manni off.


ok, so you follow the Y piece (hard plastic pipe btw) until you get to a rubber hose, which T's off. on the one side the plastic pipe will continue, and the other side T's up to the underside of your inlet. If you took inlet off it will be the (i think) the 8mm hose plugged on the nipple of underside of inlet.

So you need the cut/pull the rubber hose out between the 2 plastic pipes.

Then you put a bung in the 8mm hose off bottom of inlet.

Then you're left with 1 straight bit of plastic pipe going to the Y piece, with a gap where you cut the hose away.

Stick a replacing straight bit of hose between that.

Then place a 19mm hose on the other nipple of the catch tank and job done. This hose will vent the oil fumes away, much like sticking a breather on it would

hope this is understandable lol

Are you feeling ok mate?

I would have expected the BIG 'S' word to come out. I expect better of you young man ;)
 

Reuvers

I is a Dutch man!
Oct 30, 2007
3,374
0
Netherlands
Are you feeling ok mate?

I would have expected the BIG 'S' word to come out. I expect better of you young man ;)

HAHAHA you made me laugh out loud!

don;t know what came over me yesterday evening, but there was a couple of threads which I answered extensively... :shrug:

anyway, as I did mine only a few weeks back i figured I'd throw him a bone :p
 

greg

Newbie
Aug 31, 2005
256
0
Right.... I have read all the threads on this now and im still not sure why you remove the PCV valve for 2 reasons;

1. Taken from wikipedia "Should the intake manifold's pressure be higher than that of the crankcase (which can happen in a turbo charged engine or under certain conditions, such as an intake backfire), the PCV valve closes to prevent reversal of the exhausted air back into the crankcase again". Surely we want this function??!

2. Removal of the valve means it needs to be replaced by a straight bit of tube and then the vacuum source on the inlet manifold needs to be blocked up, thus 2 items need to be purchased and fitted. Why spend money when the PCV valve has no detremental effect on the effect of what you are trying to achieve (crankcase pressure still kept down and oil prevented from entering intake)?

Sorry to bring this topic up again but i really want to understand what im doing first and why its being done this way.

Cheers,
Greg
 

__B3NNY__

OEM with a 'Twist'
May 5, 2005
3,449
1
Oxford
I could be wrong here so wouldnt mind sombody in the know confirming, but i think the PCV valve is baiscly a check valve which wont allow the vapour to flow through to the catch tank.

People have fitted a catch tank without removing the PCV valve and ended up with next to nothing in there tanks, where as people like myself who have removed the PCV end up with a load of nasty looking crap inside the tank which obviously is a good thing! :D
 

greg

Newbie
Aug 31, 2005
256
0
From what i've read i believe the PCV valve is usually closed at idle (maximum vacuum in the inlet manifold) then as the revs increase and manifold pressure drops it gradually opens, and is fully open at maximum boost, when the valve is open fresh air is drawn from the inlet, through the crankcase and then back into the inlet, thus flushing the crankcase with fresh air. By removing the valve you are essentially creating an 'always open' condition where the crank is constantly venting to atmosphere. and you no longer have the 'flushing' effect.
 
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