View Single Post
Old 07-14-2011, 05:56 PM   #2
blue2000s
Porscheectomy
 
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
You do want to ventilate the crankcase. Without it, you'll notice a frothy brown substance built up on the dipstick and in the oil filler neck affectionately known as lung mustard. Basically, all the blowby combustion products and vaporized oil mixes the oil into an unattractive froth that isn't doing much in the way of lubrication.

Does it really need to vent into the intake manifold? Not really, but the vaccum helps to minimize aeration and is friendlier to emisions.

Last edited by blue2000s; 07-14-2011 at 06:00 PM.
blue2000s is offline   Reply With Quote