Catch Cans, A Necessity?

[barnz]

The "Can ".

It's full of Stainless Steel Pot Scrubbers... Has been working very nicely for many years now.

How much oil do you empty out of your can and how often f-wolf? Cause it should be pretty minimal out of the breather, alot could indicate you have serious blow by(a little is normal) or your pcv is passing under positive pressure. As arronm said pcv to manifold seems to be far more of a problem on daily driven vehicles. If you haven't taken your throttle body off do it and have a gander, as quite a bit seems to enter via pcv under vacuum which is "after" or "below" the throttle body, However you want to put it..

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[f-wolf]

I change my engine oil and oil filter every 5,000km's.

Zero oil use between oil changes !!

I use MOBIL SUPER S 10W-40 Semi Synthetic Engine Oil in my 3 cars... Have done so for many years.

PS, I also fitted an Engine Oil-Cooler ... Oil Temp now 80C -90C normal driving.

Before... Oil Temp used to go to 100C plus. I also run a 88C Engine Thermostat.

Edited 10/02/14 04:43 AM by f-wolf

[Vrdesign]

The "Can ".

It's full of Stainless Steel Pot Scrubbers... Has been working very nicely for many years now.

this filters only half the oil, the other half is coming from the pcv system on vaccuum. you will need a second catch can between manifold and pcv as per my pic a coupe of posts back, mine sits next to the rocker cover on the exhaust side...

[barnz]

this filters only half the oil, the other half is coming from the pcv system on vaccuum. you will need a second catch can between manifold and pcv as per my pic a coupe of posts back, mine sits next to the rocker cover on the exhaust side...

Exactly and oil temps that low aren't likely to vapourise contaminates relying on additives in the oil alone to suspend them, if you change your oil at 5k though it's not likely to become a problem. Same deal for vehicles that do regular short trips. Sludge is not your friend

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[MikeT36]

Yep that's normal. A catch can on the pcv valve will fix it

I run one on both circuits. And a big one way valve as well ( silver valve next to crankcase breather)

I think I just fell in love, Looks the Biz!!

[Bullet.68]

Looks nice arronm, how the hell do you get to the battery

[Peppy_t92]

Can you plumb up both hoses to the one can, and then one hose from the can back infront of the turbo? Or does the pcv need to go back to the manifold? Is there some sort of vacuum in front of the turbine to scavenge the air?

[Vrdesign]

[

Can you plumb up both hoses to the one can, and then one hose from the can back infront of the turbo? Or does the pcv need to go back to the manifold? Is there some sort of vacuum in front of the turbine to scavenge the air?

there would be some vacuum created, but nowhere near as much as what the manifold creates. the pcv orifice size is selected to syphon the correct ammount of vapour at max vaccumm. I would leave leave the circuit in tact and add a second catch can in that line...

[Peppy_t92]

[<br /> <br />there would be some vacuum created, but nowhere near as much as what the manifold creates. the pcv orifice size is selected to syphon the correct ammount of vapour at max vaccumm. I would leave leave the circuit in tact and add a second catch can in that line...

<br /><br /><br />Thanks for that, it was just a thought, as I already think that one can will look bad enough haha, I'll put not on the breather side and see how it goes..<br /><br />But just for argument sake, what if I were to some how attach the pcv to the outlet of the catch can and go back to the manifold. So take both from the rocker cover into the catch can, then put the pcv on the outlet and plumb it back to the manifold? Or will this alter the syphoning effect? I guess it doesn't really allow any breathing, just circulating.. <br /><br /><br />I'll stick to starting with the breather side first and seeing how it goes

[barnz]

Thanks for that, it was just a thought, as I already think that one can will look bad enough haha, I'll put not on the breather side and see how it goes..

But just for argument sake, what if I were to some how attach the pcv to the outlet of the catch can and go back to the manifold. So take both from the rocker cover into the catch can, then put the pcv on the outlet and plumb it back to the manifold? Or will this alter the syphoning effect? I guess it doesn't really allow any breathing, just circulating..

I'll stick to starting with the breather side first and seeing how it goes

That is exactly how to do it, rocker cover pcv outlet>can>check valve on outlet>manifold. You cannot run breather and pcv to the same can though it just wouldn't work right as the breather is intended to let air in as it vents. To be honest if u just want a single can go pcv to manifold. Breather to intake should remain fairly clean unless your rings/valve seats are stuffed, or you do ALOT of WOT work. In my experience oil through the breather doesn't make it past the intercooler unless it's real bad. Mind you it certainly doesn't help having it full of crap. If you want to see for sure what's more of an issue pull of all your intake stuff including throttle body. Give it all a good clean while your at it. And I can almost guarantee you will find a little between intake and cooler, nothing after. And sh*t loads in the manifold, and on the underside of your throttle body.

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