What's it there for?

[Edmond]

I was looking at the tube on the passenger side of the rocker arm covers. What is that there for? I pulled it off and there isn't a valve or anything. Is it just a vent of some kind. The tube on the drivers side is the PCV so I know that much.

 

[Ken]

It's a breather.

 

[vetteboy86]

Sounds about right

 

[Edmond]

It's a breather.

So it's just there to vent some hot air?

 

[Ken]

Crankcase ventilation.

Don't ask me why there are two forms of crankcase ventilation because I really don't know why. There must be a method as to why the PCV is a "positive" crankcase ventilation and the other is an open breather, similar to the old "road tube."

Anyone?

 

[jester]

So it's just there to vent some hot air?

Are you talking about your car or some of the CAC forums? :L

 

[Edmond]

So it's just there to vent some hot air?

Are you talking about your car or some of the CAC forums? :L

That would be the Edge!

 

[WhalePirot]

It is called positive crankcase ventilation (PCV) as the air is drawn INTO the engine through the pipe you pulled and OUT through the PCV valve, into the intake manifold. These oil vapors are burned instead of being released into the atmosphere, one of the earliest pollution control devices.

 

[Ken]

Thanks for clearing that up Mike. I was lazy last night and didn't feel like getting the books out; I did read through it now, and refreshed my memory of the PCV system. Thanks for spurring me on.