Breather question?

[aod92]

The breather hole that's on the rear driver side cover. Did you guy run a breather here or a pcv valve to your intake? Is either way better?

[72MARIO]

I am curious what to do with this as well.

the 2003 4.8 I got originally to use in the Suburban had a tube with no valve at all in it. Then I decided to get a 6.0 its a 2002 and it has what looks like a pcv but no valve inside.

[dayj1]

Originally Posted by aod92

The breather hole that's on the rear driver side cover. Did you guy run a breather here or a pcv valve to your intake? Is either way better?

Early motors have an actual PCV valve. GM later revised the valve to a fixed orifice design where it still looks like a PCV valve but has a tiny hole in the base with nothing inside. Then, the later models just have a nipple pressed in the valve cover with the fixed orifice inside the cover. In other words, a fixed orifice system that doesn't have a removable/serviceable "valve".

So, the answer is that it's part of the PCV system. If you have a later engine with a hose nipple on the valve cover, run a hose to a vacuum source. If you have a hole in the cover, you need the fixed orifice "valve" and then just run a hose from the valve to a vacuum source.