Oil Catch Can installation?

[peter thomson]

I just removed the pipe between the rear rocker and inlet pipe as in another thread. I can take a pic tonight.

[Turbo_Steve]

Thanks Peter....Guess I'd better go and check Skylines, then


Just out of interest, what do you do when it's time to empty the catch can?
They're actually not very capacious (because of the baffles and everything designed to cause the oil to drop out of suspension, they're "full" at around halfway) so I used to have to empty mine fairly regularly. Certainly, it would need doing every time I topped the oil up!

[peter thomson]

It's only been on a short time Steve and there isn't any oil at the lowest level window yet

[miller]

I can take a pic tonight.

Cheers Peter, im 99% sure I am on the right pipe, buts it's nice to see another one to confirm. Confidence is what i lack with stuff like this but im getting there.

Mike

[swinks]

Yes Peter, can you do more pics, please?

I have the same can and right now I'm struggling to find right place to fit one. Yours seems be perfect, so can I steal your idea?

[peter thomson]

Pics
First one is the catch tank
Second outlet from rocker.
Third inlet of the inlet pipe behind MAF

[swinks]

Thanks Peter!

Another question.
I have few spare "y" shape connectors 10mm ID.
What's about to join both breather hoses from front and rear bank using "Y" connector, then one hose to catch can inlet and blank inlet on rear bank (those which is connecting front and rear)?
Or there's just forced circulation and it won't work, only rear bank breather outlet with can in-line.

[peter thomson]

The advice in the other threads is to take it from the vent to inlet but I don't see why it wouldn't work as long as the system is kept closed

[miller]

Peter, thanks for your imput, i finally got round to installing mine today. Was simple as i had the plenum off anyways, made life very easy on connecting it all up! Rep on its way!

Cheers

Mike

[chris g]

How do you close the bonnet with all that pipe hanging out...?

Just push it under the bonnet as you close it , like packing a suitcase...?

[miller]

the last picture should be second! That was just the way i judged how much pipe i would need for each run. ie i obtained a 2m lenght of hose, connected either end to the block breather and return pipe. So when the can got installed all i had to do was cut to length etc!

[peter thomson]

Nice job Mike

[Dom B]

Do these engines have a PCV system or can we just vent to air? Possibly with a 1 way valve. I have just cleaned all the pre turbo pipework of oil and want it to atay that way. the last thing i need is a glob of octane reducing oil shooting through the engine on full chat.

[dublee]

i have one of these on my firewall, was there when i bought the car.
i've never emptied it or anything, does it not empty itself back into the engine oil?
i'll take a few pics tomorrow.

[Davezj]

yes there is a pcv in the front rocker cover it is the black pipe coming out of the back of it and going down to the bottom of the inlet manifold.
this will suck oil vapour from the rocker covers and send it to one of the middle cylinders.

the other oil vapour route is when the inlet manifold is pressureised, the oil vapour then get blown out through the front rocker cover to the rear cover and then out to the pre turbo inlet piping. this will drain down to the turbo inlets and then down to the standard bov/recirc valve and collect. then when recirc valve dumps pressure the oil gets blown back up the turbo inlet pipe work. makes a right mess.

2 oil catch cans are needed to completly stop the oil vapour getting into the egine. one on the PCV side and one in the breather pipe between the rear rocker and the inlet piping.

hope this helps.

[Dom B]

Cheers Davezj, going to investigate. Finishing off my bottom arms off now then looking into the routing. I've seen the front to rear rocher cover pipe next tot eh airbox thet then comes back out to the pre turbo pipe mainly to the back turbo.

I looked at the recirculating valve pipe and thought that would end up collecting the oil to the front.

I just cleaned out all the pre turbo pipes yesterday when i did the thermostat and i don't want it getting oily again. Might make up some catch tanks for our system.

[miller]

Just an update on this, to date no oil has reached the indicator level in my catch tank so im taking it that its all good and working!

[Davezj]

i have made some oil catch tubs from a couple of glass coffee jars and some fitting through the lid. i filled the jar with stainless steel pad pan cleaners (so they will not rust) and these will act as the condensing material as the vapour flows from one pipe to the other.
glass jar will be ideal to see the oil and you just need to unscrew the jar from the lid to empty the oil out.
i still have to make the bracket to hold them, but that will be easy now i have a job lot of cheap old metal maccaro.
i was going to mount one on the bulk head above rear turbo (it will be a bit warm bit shouldn't cause any problems) and the other strapped to the expantion tank as mike has done, this one will be the PCV valve catch jar.

[WildCards]

I've just replaced the PCV system on the Saab which has an oil trap as standard. At the bottom of the trap it has an extra hose which drops down and connects to the sump,which obviously takes care of any oil build up. Does the VR4 have a sump breather which could be connected to?

[Colin Wiltshire]

Can anybody tell me what size pipes to get? thought might be 10mm but not sure, thanks