So, I'm going down the road pretty much flat out in 4th or 5th, engine WFO under full load at 3500 to 4k, when suddenly the engine goes flat and a huge oil cloud bursts fourth from the exhaust. "Oh spoob", I'm thinking, "holed a piston, or sucked a valve" In just that amount of time, it quits smoking and the engine regains power, and I'm off.

 

This happens once about every 2 months, sucks a big glop of oil, spits it out, keeps on going.  WTF?  Anybody ever heard of this?  How can the engine suddenly suck in a bunch of oil all in a lump, then not do  it again for a couple of months?

 

Usually it is due to a Problem with the Positive Crankcase Ventilation Setup & PCV Valve.

 

More info on your Engine model, if it is EFi or Carb will Help to give the Proper answer.

 

But if it is Carb'd, then it could be a Stuck Open PCV Valve,

 

if it is EFi, there is a Factory Re-route Kit for the PCV setup,

 

That prevents such Symptom.

 

Kind Regards.

I had similar problems in my "BumbleBeast" and I had to install an Oil Catch Can between the Drivers' side Head Hose and the PCV Valve; follow this Link for more info:

 

~► http://www.ultimatesubaru.org/forum/topic/114260-oil-catch-can-in-ea82/page-2

 

There are Photos and Details of the PCV Re-Routing on EFi Models as well.

 

Kind Regards.

I know this isn't helpful advice.. But that actually sounds pretty awesome.

The Cloud of Smoke?

 

Well, thinking about that, sounds like something done by one of James Bond's cars in a Pursuit...

 

Kind Regards.

Ya know, that all makes sence.  Going for that EFI kit, and thanks for your latest help..

 

brian