REFLECTOR: Crankcase venting

John Tvedte johnt at comp-sol.com
Wed Apr 27 10:15:50 CDT 2011


Scott,

Have you tried without the Andair?  What is the size of the crankcase breather outlet on your IO-520?  Bart @ Aerosport said (for my IO-540K) that 5/8" was the min. (fine for a healthy engine) - and that 3/4" would be fine in general.

John

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Scott Derrick

I'm experiencing oil seeps that I think I the result of excessive crankcase pressure.

Continentals are notorious for blowby, even when new and require a very open vent. I installed a Andair air/oil separator which does work really well in captureing the oil but I fear it is causing the excessive back pressure.  Anybody else have experience in this regard?


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