Thread: How does the PCV work on Supercharged 3800 series II??

On my GTP it was a tube that ran from the back of S/C to the intake tubing.

Originally Posted by Adecker

On my GTP it was a tube that ran from the back of S/C to the intake tubing.

On the Series II it's just internally vented back into the manifold. On Series III it's externally vented into the intake. Works the same either way.

To answer the origional question its just a one way valve between the crankcase and the intake. The valve is a replaceable piece that sits under that pcv cover and is held in place by a spring. It allows the crankcase to vent so that it doesn't pressurize and blow oil out of all of the seals. If I remember right the bottom of that hole is connected to the crankcase and near the top is a hole going to the intake. Valve sits between those.

The PCV valve puts vacuum (from inlet of supercharger) to the crankcase. The crankcase now needs and air source (crankcase is sealed and vacuum is bad) so there is a hole in front of LIM. This hole let's air into crankcase. The passage connect through the supercharger up-through the throttle body (gen 3) and gets air from after the MAF and before the throttle plate. The air is measured by the MAF so the computer sees all air for combustion.