Project Viper GTS: Part 8 – Bob’s Air-Oil Separator

Bob's Oil Separator Dodge Viper GTS Gen 2Make sure the line that goes OUT of the CCV and 90-degree elbow goes IN to the bottom port of the AOS, while the other line goes OUT of the top of the Air-Oil Separator and IN to the “T”-fitting at the intake manifold

Now that the Bob’s Auto Sports Air-Oil Separator is successfully installed in our PCV system, we turned our attention to the more obvious problem:  the valve cover vent.

Dodge Viper GTS Gen 2 Valve Cover Vent Leaking OilIt’s not uncommon to see oil seeping from the valve cover vent tube.  While not as pressurized as the PCV/CCV, valve covers can still see positive pressure and undersized drain-back tubes can cause excess oil in the valve covers to slosh around and work its way to the airbox.
Dodge Viper GTS Gen 2 Airbox Valve Cover Vent SpongeLooking inside the airbox, there is a little yellow sponge that somewhat acts as a baffle and filter for the valve cover vent.  Prior to cleaning, this sponge was saturated in oil with a distinct oil trace flowing into the driver’s intake tube.  The corresponding throttle body also had a small amount of oil puddled at the base of the blade.  This was an obvious trace of power-robbing, knock-inducing oil entering our combustion chamber.  At this time we feel this was more of a priority over catching oil in the PCV/CCV.
Viper Valve Cover Vent tubeTo install our catch can, first we need to remove the plastic vent tube which easily pulls right out.
Dodge Viper GTS Gen 2 Valve Cover Vent TubesAll we need to remove is the straight plastic tube.  But here we can clearly see how the line vents both valve covers.
Dodge Viper GTS Gen 2 Valve Cover Vent Catch Can routingNext, we inserted the 90-Degree 5/8” Brass Barbed Hose Fitting into the “T”-connection and reused the factory constant tension clamp.  Then we ran a long 5/8” Inner-Diameter hose down to the brake booster area.

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