PCV Valve/Catch can set up

[snoon]

Hi All,

I'm trying to plumb in my oil catch can (At the moment I just have the PCV valve blocked off and the rocker venting to atmosphere).

But how do people have theirs plumbed in?

I would have searched the gallery but it's not working.

Basically the catch can only has 2 pipes coming off it and if I plumb one to the PCV valve and one to rocker then it will have no-where to vent any pressure to? Will it?

As you can tell I ain't got a clue.

I did quite a lot of searching but ended up more confused as they were all banging on about oils separators too? I thought the black box on the front of the rockker was the separator?

Any advise or pic's that might help would be appreciated.

Cheers
Shaun

 

[campbellju]

Box on the front of the rocker is the OE separator.

Your catch can will need to have a vent of some sort to relieve pressure. My original catch can was a 1l oil bottle with the two hoses shoved into the top. My new catch can is an aluminium sugar tin with the hoses tapped to it and a hole drilled in the top with some steel wool behind it to trap the dirt. The wool is covered in oil from the fumes so it helps it trap any dirt too!

Back to your issue if you only have two holes then you will need to connect the pipes up on the in and vent on the out. Just check your catch can isn't some fancy model where the lid doesn't act as a vent as well.

Is the catch tank for the Oulton track day?

 

[Tim]

At what level of tune is it advisable to upgrade the breathing system?

What are the downfalls of the standard system?

 

[campbellju]

At what level of tune is it advisable to upgrade the breathing system?

What are the downfalls of the standard system?

More down to usage than tune. Hard usage raises oil temps, oil gets thinner and at higher loads tends to get sprayed into your intake for the good of the environment. Not so good for combustion or your intercoolers.

If you are finding you need regular top ups of oil then its a sign that you are driving the car quite hard and need an upgrade. Many owners don't bother though and get along fine.

Jim

 

[snoon]

Is the catch tank for the Oulton track day?

I wish - my Haltech needs mapping still :doh::?

 

[snoon]

I'll try and put a pic up of the catch can set up I have been given as it also has a 2nd part which I have no idea what it is!!

It was free afterall though!

Cheers for replies so far!

 

[snoon]

Right, I have some pic's of what I have got.....
This is what looks to be the catch can part, it has 2 pipes enetering the top of it, and a small plug at the bottom for draining it.....

I also have this separate bit......

It has 4 holes for pipes, and the bottom of it looks like it too is a hole, I'm thinking it must be some kid of oil separator? One of these holes did have a small filter on the end so presume that is is to vent the pressure to atmophere?
From another angle....

Basically on my R - I have the standard oil separator in place at the front of the rocker cover. I have a hole which used to feedback into the standard air intake pipes. I also have the PCV value removed so need to some how circulate both these 'hole' in my rocker. I was just going to attached the catch can - 1 pipe tot he rocker and 1 to the PCV hole, but this won't let the pressure go anywhere as it won't have anywhere to vent to?

Any ideas???

Cheers

Shaun

 

[snoon]

anyone???

I'm thinking of just using the catch can and T piece-ing a breather in?

 

[Davie Houston]

What i done with mine was:

Where the PCV valve was, just block that off.
And from the breather pipe on the right hand side of the rocker cover, put it onto 1 of the pipes on the catch can, and the other put a filter on to it.

Job a good un

 

[PobodY]

I think Jim's plumbing job is all that's needed:
- Hose from the crank case going in somewhere near the top.
- Vent to the atmosphere on the opposite side (preferably behind some kind of baffle or oil/mist seperator)
- Bottom hose/stopcock drains back to the sump, or is blocked-off to just collect the oil.
- Plug the PCV.

Then any crank pressure will blow out into the catch can, the oil will be pulled-out and it will vent to the atmosphere... or it will pull clean air in through the filter and into the crank case. - The original ideal is that the PCV sucks the crank-case emissions into the inlet to burn them off, and they're replaced by clean air into the crank case from that pipe to the intake hose. When you block the PCV any crankcase pressure you've got has to escape through that breather hose... so ultimately it goes through the turbo and into the inlets anyway (unless you put a catch can in).

I don't know what you've got there Snoon, but I think it's one catch can for the breather hose, and an oil mist seperator that might be for the PCV to stop it spraying oil into the inlet manifold (but still allowing it to vent the emissions somewhere).