Breather Filter?

[cjpacitto]

Has anyone tried connecting a breather filter to the air/oil separator?

My engine has been losing oil (no leaks, no smoke) and I found a fair amount of oil (nice clean oil, no white goo) in the intake elbow. I have ordered new seals for the air/oil separator a new hose (air/oil separator to elbow) and all new hoses for the idle control valve. 3 of these 4 hoses had cracks.

While looking at this arrangement I got to thinking that it might make more sense to just put a small breather filter right on top of the air/oil separator rather than connecting it to the intake. I was wondering if anyone has tried this and how it worked out? I'd also welcome comments from those who haven't tried it but have an opinion on the matter

Alternately, I could connect the breather filter to the end of the hose (where the hose would normally connect to the elbow) so that I could change it back to the stock configuration if it didn't work out without having to pull the intake manifold again.

I know Lindsey Racing sells an oil breather tank, but I'm not interested in doing that at this time.

[Techno Duck]

You want to keep a vacuum to suck out the oil vapor and reduce crankcase pressure. You can put an inline catch can that recirculates back into the j-boot as it did from the factory. One venting directly to atmosphere is not the best solution.

Check out a company called http://www.saikoumichi.com/ for a Porsche specific application. I am a user and have had great results.

[TexasBlake]

Originally Posted by Techno Duck

You want to keep a vacuum to suck out the oil vapor and reduce crankcase pressure. You can put an inline catch can that recirculates back into the j-boot as it did from the factory. One venting directly to atmosphere is not the best solution.

Check out a company called http://www.saikoumichi.com/ for a Porsche specific application. I am a user and have had great results.

Where in your engine compartment did you mount it?

[HondaDustR]

Yes, it is a pain the way the system works if you have any vacuum leaks. I struggled with the problem for awhile and think I finally solved it. Any vacuum leaks ANYWHERE at any crankcase seals can get enough of a draft going through the crankcase to carry oil mist right through the AOS and into the intake. The vacuum also prevents some large "oil" leaks from becoming obvious since the vacuum more or less keeps the oil in. The oil leak that finally seemed to fix mine was the balance shaft housing rear plug o-rings, since both had shrunken to the point the plugs were very loose inside the housings. It got so bad, that I was running the AOS breather hose disconnected with the J-boot connection blocked off for days at a time as an experiment. The engine ran much better (since pretty much any leak is a vacuum leak with this system), I got no oil in the intake, and it started leaking alot of oil out at the balance shaft plugs.
Bad piston rings can also do it with excessive blow-by, but mine seem to be ok.

[Techno Duck]

Originally Posted by TexasBlake

Where in your engine compartment did you mount it?

I mounted it to an existing threaded hole on the hood latch. You must be using a MAF setup to do it like this though.



BTW, i am moving to Houston around the first of July for a couple of months. Wont be bringing the 951 though.