oilcatchtank

[S2central.net]

Have a look at these pictures...

Important features are the catch/breather tank must be 'baffled' to increase the surface area and encourage oil/vapour separation. It also stops fumes blowing straight thru. The drain to sump is important - please note that must be below the oil level line in the sump. If not then the drain pipe will simply pressurise with the crankcase fumes.

The attached zip file contains three JPG images with various options on the ABY engine - the 3B is no different really in this regard.

Option 1 shows an oil separator tank that integrates with stock PCV system - allowing the fumes to be inhaled by the engine under vacuum. Oil is returned to sump.

Option 2 is cleaner with no fumes returning to the engine - they get dumped to atmosphere. Oil is returned to sump.

Option 3 depicts use of exhaust pipe to generate vacuum and suck crankcase fumes out the exhaust. Otherwise known as the 'evacusump' which was discussed here a longtime ago.


HTH,

Paul

Paul

[Mark Halligan]

hello mark how,s it going ? that catch tank looks good is it anodised?

Hi Jamil

yep its an anodised Mocal tank, same one as a few here are using. Its just a puke type tank and comes with no internal baffling.

P.S. PM'ed you about the injectors

[4WheelDrifter]

There is reason for having the filter. Air (possibly carrying dirt or dust) can also be drawn back into the crankcase. When the engine cools after being run, the cooling air inside the crankcase contracts (Charles's Law). This draws air back in through the breather. You don't really want dirt in your breather system or your crankcase.

[Henka]

How exactly do you feed the oil back into the sump? Is there a inlet somewhere you guys use?

A tank with no onternal baffling - is it worth anything at all or just a waste of money?

DOes it require alot of service? I mean, does it clog up and such? How often do you have to take things apart?

Is option 1 a sustansial upgrade from stock or is it hardly worht it? Is option 1 the sneaky, 2 the preferred and three the exstensive/de-luxe version?

That Mocal can looks good. How much is it?

Intriguing...

[4WheelDrifter]

The usual way to feed the oil back to the sump is through a modified sump plug.
More details of Mark H's catch tank here.

[Mark Halligan]

A tank with no onternal baffling - is it worth anything at all or just a waste of money?

Henka

I filled mine with a stainless pan scrubber to catch the oil (NOT steel wool), I got the idea from this autospeed article .

Doug I think cut the back off of Mocal can and fitted a baffle and a pan scrubber, not sure what the others have done.
In the future ( been meaning to do it for a couple of years now ) I will route the tank outlet to the down pipe and use the vacuum generated there, described here