PCV Valve Screen in Ford 5.0 Liter

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swimdad16 - 19 Aug 2006 20:25 GMT

I've read a couple of items that say there is a screen ahead of the PCV
valve that causes problems when it gets blocked.

I pulled the PCV valve from the valve cover and I removed the fitting that
screws into the read of the intake manifold. I can't find a screen in either
opening.

Which end of the "system" is this screen supposed to be? Valve cover or
intake manifold?

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halatos@gmail.com - 19 Aug 2006 23:59 GMT

> I've read a couple of items that say there is a screen ahead of the PCV
> valve that causes problems when it gets blocked.
[quoted text clipped - 5 lines]
> Which end of the "system" is this screen supposed to be? Valve cover or
> intake manifold?

On our ford van the PCV filter was inside the air filter housing. The
only way to see it was to open up the air filter assembly. It looked
like a miniature version of the air cleaner element.

Chris

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Bob La Rocca - 20 Aug 2006 00:49 GMT

On my "new" '93 mustang 5.0 convertible I bought a bunch of tune up parts
including the pcv screen. I found it in the intake manifold, under the PCV
valve. Take the grommet out and look into the intake. You may see a mesh
plug that just sits in there. Pull it out with a long nose pliers and pop
in the new filter. Replace the pcv grommet and valve while you are in there
and you're good to go.

Literature says this filter plugs up and causes high crankcase pressures and
poor ventilation so its cheap insurance to replace it.

Good luck

Signature

Bob La Rocca
Lindenhurst, NY

> I've read a couple of items that say there is a screen ahead of the PCV
> valve that causes problems when it gets blocked.
[quoted text clipped - 6 lines]
> Which end of the "system" is this screen supposed to be? Valve cover or
> intake manifold?

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swimdad16 - 20 Aug 2006 02:23 GMT

Does your PCV valve connect into the manifold or the valve cover?

The valve/grommet on the truck is in the valve cover. The part that screws
into the manifold is a fitting with a 90 degree bend in it.... It faces the
firewall so I can't actually see into the manifold.

The manifold also covers most of the valve cover so I can't actually see
into the valve cover. I can feel a baffle inside the valve cover but there's
no screen.

> On my "new" '93 mustang 5.0 convertible I bought a bunch of tune up parts
> including the pcv screen. I found it in the intake manifold, under the PCV
[quoted text clipped - 17 lines]
> > Which end of the "system" is this screen supposed to be? Valve cover or
> > intake manifold?

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MasterBlaster - 20 Aug 2006 03:56 GMT

> The valve/grommet on the truck is in the valve cover. The part that screws
> into the manifold is a fitting with a 90 degree bend in it.... It faces the
> firewall so I can't actually see into the manifold.

> > On my "new" '93 mustang 5.0 convertible I bought a bunch of tune up parts
> > including the pcv screen. I found it in the intake manifold, under the
> > PCV valve. Take the grommet out and look into the intake.

Maybe the trucks are different. You're still talking about a 93 F150, right?
On many other 5.0s, the PCV valve is in the rear center of the manifold,
a total pain to get to unless you lay on top of the engine. The "screen" is
a
little metal-mesh filled can that drops in the hole just under the PCV
valve.
It looks like: http://www.rockauto.com/ref/Airtex/6P1257.jpg
And it goes in here: http://www3.telus.net/neatcrap/pics1/pcv-grommet.jpg
Maybe the mechanics bitched so much about the PCV that Ford moved
it back to the valve cover, where it used to be for decades.

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swimdad16 - 22 Aug 2006 05:38 GMT

Yep it's a 93 F-150... but the PCV is in the right valve cover and there a
tapped fitting into the intake... doesn't look anything like the pics you
posted.

Is your Mustang Fuel Injected? The truck is... maybe that's the difference.

> > The valve/grommet on the truck is in the valve cover. The part that screws
> > into the manifold is a fitting with a 90 degree bend in it.... It faces
[quoted text clipped - 16 lines]
> Maybe the mechanics bitched so much about the PCV that Ford moved
> it back to the valve cover, where it used to be for decades.

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lugnut - 22 Aug 2006 10:38 GMT

>Yep it's a 93 F-150... but the PCV is in the right valve cover and there a
>tapped fitting into the intake... doesn't look anything like the pics you
>posted.

If you have an original unmolested '93 F150 w/5.0L, the PCV
is at the rear of the engine. If someone has changed the
valve cover and rerouted the PCV, you usually do not have a
screen - it would have a baffle inside the cover. It
sounds like someone may have replaced the cover or maybe the
entire engine.

Lugnut

>Is your Mustang Fuel Injected? The truck is... maybe that's the difference.
>
[quoted text clipped - 22 lines]
>> Maybe the mechanics bitched so much about the PCV that Ford moved
>> it back to the valve cover, where it used to be for decades.

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