97 Turbo PCV routing - which is correct?

Post by **MadeInJapan** » 21 Jun 2008, 20:48

Wow...I hope so too...I like your idea of slotting the metal hose covering...that makes a lot of sense to me! Great write up....I'll probably pin this in the database.

Post by **holler1** » 04 Jul 2008, 09:22

From the standpoint of industrial separator design, the "pinned" version of the PCV separator makes more sense with the inlet flow from the block going into a "swirl" section on the outside and the vacuum (outlet flow) connected to the center section. This is how cyclone separators are designed to separate particles from gas flows. The swirling flow spins the particles or oil droplets toward the walls of the separator. I'm not sure why the line from the top of the block is there, but I'm assuming the main inlet flow from the crankcase is from the large line coming from the block into the top side of the separator.

chuckcintron · Post by **chuckcintron** » 04 Jul 2008, 11:12

You get some blow-by through the valve guide/seals and the oil filler cap is unvented, so you need that top hose.

The block is vented from the bottom input to the cannister and the sump is vented from that top input.

Your description of the physics makes a lot of sense. I wonder why VADIS is so screwed up. They must have been thinking *something* when they published that diagram.

-Chuck