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PCV on an 03

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Old Feb 21, 2011 | 04:18 AM
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PCV on an 03

Postings were contradicting on where the 03 PCV is so here's the scoop...

Firewall valve cover, a little driver's side of center, has a 6-8" right-angle hose connecting to the intake manifold with spring clamps. The PCV valve is THREADED (should have been obvious to me when I saw the big nut on it!) and is $16 at Autozone (pricey!).

You can test it without removing if you disconnect the hose at the manifold side and connect a piece of hose to the open end. If you blow into the hose it should be stopped up by the PCV. If you suck LIGHTLY (don't get a lungful of crankcase gasses like I did!) there should be air going through the PCV. If you suck/blow/suck/blow you shold be able to make the valve chatter. Saves removing it (which isn't all that hard anyway).
Old Feb 21, 2011 | 04:22 AM
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i change my PCV everytime i do an oil change
Old Feb 21, 2011 | 04:28 AM
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Originally Posted by rickso03
Postings were contradicting on where the 03 PCV is so here's the scoop...

Firewall valve cover, a little driver's side of center, has a 6-8" right-angle hose connecting to the intake manifold with spring clamps. The PCV valve is THREADED (should have been obvious to me when I saw the big nut on it!) and is $16 at Autozone (pricey!).

You can test it without removing if you disconnect the hose at the manifold side and connect a piece of hose to the open end. If you blow into the hose it should be stopped up by the PCV. If you suck LIGHTLY (don't get a lungful of crankcase gasses like I did!) there should be air going through the PCV. If you suck/blow/suck/blow you shold be able to make the valve chatter. Saves removing it (which isn't all that hard anyway).


SN: on the 5.5 gen i think its on the passenger side on the valve cover...on the 5th gen it is under the TB. did mine on my 5th yesterday..most difficulty was removing the airbox. 10 minute job.
Old Feb 21, 2011 | 04:30 AM
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^^rear valve cover
Old Feb 21, 2011 | 04:50 AM
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yea thats what i meant..passenger side rear valve cover. from the pic i remember seeing its pretty easy to get to
Old Feb 21, 2011 | 12:00 PM
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The inside of my intake manifold looks very oily... Could it be a bad PCV valve? I replaced my rear valve cover and my car still burns oil... Anyone ever experienced the front PCV valve going bad?

Old Feb 21, 2011 | 12:56 PM
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Originally Posted by Gizm0
The inside of my intake manifold looks very oily... Could it be a bad PCV valve? I replaced my rear valve cover and my car still burns oil... Anyone ever experienced the front PCV valve going bad?
There is no valve on the front valve cover connection to the PCV system. That is merely a vent that pulls metered air (after the MAF) through the engine and into the back of the intake manifold through the PCV on the rear valve cover.

If you are getting a lot of blowby, could be piston rings. Do a compression check.

I have the PCV system venting to atmosphere and instead of an oily intake manifold, it just smells like fuel from the evap.
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