Okay here is the deal:
I have a 1995 with a Vortex supercharger. When I bought the car someone had plugged the PVC (this is typical I am told) to vent crankcase of pressure being built when supercharger was working. So they drilled a hole in the oil fill cap, then put a 90deg. elbow into the fill cap and then attached a hose that ran down to front of car. Needless to say this created a mess under hard driving as oil was coming out of this hose. So I decided to put a mini K and N type filter where the hose was coming out of the oil fill, well this worked for a while (a day) until it got saturated with oil and then leaked on valve cover and then down on to headers which creates alot of smoke and smell in car. So I have kind of looked into this and have found that an oil catch can system is the way to go?

My question is do I unplug the PVC and vent to catch can or do I just leave system as is and vent from oil filler cap to catch can?

Any ideas?

 

I am running a catch can. I am running a line from each valve cover. They merge then go into the catch can.

 

Thanks for reply, the catch cans I see have an inlet and an outlet on them - if I was only going to vent from oil fill on passanger side I was wondering where the outlet from catch can would go?
Thanks
Jim

 

May want to do a leak down test

Sounds like something is not sealing.

 

When I put my SC on I vented both valve covers. I ran it a couple of years that way. The vents did there job OK, but every once in a while I would see a drip of oil. Also the open vents is not the cleanest condition. I like to keep my engine as clean as possible. My catch can collects more vapor then anything else. My can has a vented filter sitting on top of it. It has two inlets with one of those plugged. There is a drain on the bottom.

 

BASICS: !!!
First Brian gave you good advice !!! You probably, if engine stock, have a cracked piston.

Easy check: engine at a hot idle. Remove the oil fill cap and place your hand over the opening. Any huffing or puffing (air in and out) indicates a cracked piston. A little smoke is OK but huffing or puffing (without smoke in some cases) is NFG !!!!

Oil spewing from a breather is bad news !

All things being equal a 'good' engine will not have excessive blow-by with or without a blower. Excessive blow-by is seen as oil dip stick pops out or a dripping breather.

Maximum venting of crankcase is always advantageous to max HP but if blow-by is excessive (i.e., cracked psiton) you must fix - in other words a re-build !!!!!

The PCV system is a good invention. On the L98 we draw fresh air in thru the passenger side valve cover and back out thru the PCV attached to the driver's side valve cover. Good system and keeps the engine clean.

On the LTx C4 the PCV draws from under the the manifold so we can vent both valve covers. On the L98 we need keep one valve cover less vent (unless equipped with a checkvalve) so we draw freah air thru crankcase and into manifold.

Not obvious to the casual observer but critical to clean engine and clean emissions. Some vendors abandon the PCV system because it costs money to do correctly but a good PCV system costs no power and in the long run preserves your engine. It's really simple once you understand WHY we have a PCV system !!!!!!!

VTY - greg

 

PS: You do not need an oil catch can with 5 to 15 pounds of boost into a 'good' engine !!!