hi

does anyone know how can i make a DIY oil catch tank?

i disconnect the 2 lines from the valve covers ,that will go to the open air , and also close the lines on the air filter box.

do i need to connect something to the lines that comes from the valve covers, or just to leave them like this without connecting them to nothing?

 

thank you.

moshe.

I used little breather filters on the ends. INstead of all my PCV system routeing to my PCV valve on the intake manifold I routed it all to a little breather filter. Shouldnt really be pushing enough oil out there to necesiatate a catch can. Mine blows all kinds of oil through there and I havent even clogged up the filter yet.

I would advise against messing with the PCV system. I'm pretty sure that's what caused mine to start leaking MAJOR oil out the cam seals due to the difference in crankcase pressure.

 

If it's sucking oil into the intake through the PCV system, replace the valve with a genuine subaru one, and put on new hoses. Try to route them similarly to the factory ones, making the one going from the drivers side of the engine go as high and as vertically as possible. This will make it more difficult for oil to get far enough into the hose to get sucked in. It will also help to have clean hoses, as when they get gummed up, the diameter decrease necessitates an increase in flow velocity, which results in more oil going along for the ride.

 

I have pondered the idea of a catch can, and I think all it would require is a small chamber with hose fittings connected to it. Probably the one connected to the PCV valve would go to the top of the container, and the one going to the engine would connect to the side. Or maybe you could make a vertical cylindrical container and put the crankcase-side hose on the bottom so that the oil would drain back into the pan and you wouldn't have to periodically empy it. Just a thought.

Many ppl have done this mod and I only heard of one with problems as a result. Two now I've seen in person working with re-routed PCV systems and no extra oil leaks to report.

 

Only time I've heard of re-routing the PCV system and bad results was when someone accidently BOOSTED their PCV system . Someone accidently plumed in boosted intake air into the block on an EA82T through the PCV system. That did result in some bad oil leaks if I recall correctly :-p However that was operator error

Many ppl have done this mod and I only heard of one with problems as a result. Two now I've seen in person working with re-routed PCV systems and no extra oil leaks to report.

 

Only time I've heard of re-routing the PCV system and bad results was when someone accidently BOOSTED their PCV system . Someone accidently plumed in boosted intake air into the block on an EA82T through the PCV system. That did result in some bad oil leaks if I recall correctly :-p However that was operator error

 

Yeah, I could see where that might cause some problems!

guys that use soob motors for airplane applications do it all the time, they use filters at each valve cover. if they do it in the air, i feel pretty good about doing it on the ground.

guys that use soob motors for airplane applications do it all the time, they use filters at each valve cover. if they do it in the air, i feel pretty good about doing it on the ground.

What do these filters look like and where might one find them?

What do these filters look like and where might one find them?

1" tall, 2" diamiter circle, filter element with metal screen around it. Black plastic / rubber. Commonly referd to as 'valve cover breathers' or just 'breathers'.

 

You can find them in the "Import" or "Performance" sections of most parts shops. Next too the elite chrome thermostat housings, chrome v8 valve covers, anodized green oil caps, and french tickler rubber steering wheel covers

I have the filters on now, but before I did that I just used a clean shop rag...

Nice throttle return spring