Pcv valves

[Ziegelsteinfaust]

I am fixing my dad's Hot-Rod a 29 Model up as I have time. As all the problems are small, and don't effect it much as a matter of running.

So to clean it up as I go.

Can you run the pvc system in the back of the intake manifold where your just above the lifter valley?

[Willshook]

Cool

I think you'd be OK using any intake manifold vacuum source, but I'm not clear on where you want to connect. Can you share a picture?

[Ziegelsteinfaust]

I meant drilling a hole in the manifold, and putting the pvc valve there.

[Willshook]

I'm hesitant to answer without understanding exactly where you're looking to drill...

[kwmech]

In the lifter valley I'd be concerned about drawing too much oil through the system, plus I don't know how you would seal it up unless you found the perfect grommet in compliance with the thickness of the manifold

[Wrenchbender Ret]

You need to tell us what engine you are working with. You can't put the pcv valve any where in an intake manifold runner. If it pulls the vacuum from just part of manifold that runs to separate cylinder/s you will get a rough idle. It needs to be at the carb or close to it.

George

[Dead Parrot]

Is there some reason not to do it the way the factory designed PCV? Draw air into one valve cover and pull it out via the other side?

Even if you find a way to put one in the intake over the lifter valley, you will still need an air intake somewhere.

If you are determined to use the intake, assuming an SBC, you might be able to use the spot at the front where the oil fill tube went on older motors.

[cadillac_al]

It sounds like the ol' 29 needs a 283 or small journal 327 with the old road draft/pcv system. Like kwmech said, I don't think you could find the perfect grommet to seal a hole in the intake manifold. Then you would most likely need the old style manifold with oil fill in the front for an air vent.

[raggedjim]

These guys did it...
https://paceperformance.com/i-514637...e-drilled.html

The hole doesn't go into the intake runner. The hole is where the pcv will pull crankcase gases, the other end of the pcv goes to your vacuum source.

This would also work on the newer intakes with a valve cover mounted breather.

If you drill the hole yourself you can use this style grommet, it is baffled to prevent the pcv from pulling oil. https://www.summitracing.com/parts/m...saAv6IEALw_wcB

Good luck, Rg

[Ziegelsteinfaust]

Originally Posted by raggedjim

These guys did it...
https://paceperformance.com/i-514637...e-drilled.html

The hole doesn't go into the intake runner. The hole is where the pcv will pull crankcase gases, the other end of the pcv goes to your vacuum source.

This would also work on the newer intakes with a valve cover mounted breather.

If you drill the hole yourself you can use this style grommet, it is baffled to prevent the pcv from pulling oil. https://www.summitracing.com/parts/m...saAv6IEALw_wcB

Good luck, Rg

Thanks

I never seen those baffle grommets before

[raggedjim]

Originally Posted by Ziegelsteinfaust

Thanks

I never seen those baffle grommets before

I've never used one but I am researching doing this on my truck.

Good luck, Rg