Is Venting the Crankcase good.

[MOMO96Z]

I have heard alot of issues about venting the crankcase with the small breather on top of the valve covers. I am in the process right now of installing a supercharger and wondering if i need to used the breather that came with it. I have heard that it causes problems with the vacumn in the intake manifold and such.

[Jeff_in_Atl]

There was a post about this a while back.

http://www.f-body.com/index.html/sho...ight=crankcase

[Injuneer]

If you install a blower you are going to need to vent the crankcase, and reroute the PCV system.

[MightyMaro666]

i have a blower and i dont have a crank case breather how do i hook one up and do i have to re do the pcv system, how do i do that???

[Injuneer]

I don't have a blower.... but the systems I've seen simply put a conventional filtered "breather" on the valve cover(s), then route the PCV valve back to the inlet of the blower, so it is exhausting to a low pressure area. If you leave the PCV venting into the intake manifold, when you are under high boost, and getting significant blowby on the rings, the crankcase will build pressure and blow something out - intake manifold rear strip of RTV sealing it to the block is a likely candidate.

Some people find that when they route the PCV discharge to the blower inlet, they have to put a small oil seperator in the line.

But, follow the recommendations of your blower manufacturer, or get the specifics from someone who really knows blowers. Never trust a nitrous junkie....