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Old 02-25-2007, 11:34 PM   #1
Vernon Tull
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Default PCV Valve on 4.6 Engine ?

Our owner's manuals say that the current 4.6 doesn't have a standardservicable PCV valve. Am I reading and understanding this correctly?

I'm concerned because I had a car of another make whose engine had a PCV valve but it couldn't be changed out by the owner. With about 50,000 miles on the clock, crankcase pressure built up so much that I had terrible oil leaks. Does this seem to be an issue with the Mustang 4.6 L engine?

Thanks, gentlemen.
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Old 02-26-2007, 05:10 PM   #2
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Default RE: PCV Valve on 4.6 Engine ?

Well try it one more time . . .
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Old 02-27-2007, 11:09 AM   #3
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Default RE: PCV Valve on 4.6 Engine ?

I think instead of having an actual valve like most PCV's in the past, our cars just have an unrestricted tubefrom the valve cover to the intake. So there shouldn't be a valve that can get stuck and cause oil leaks because of too much crankcase pressure.
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Old 02-27-2007, 11:14 AM   #4
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Default RE: PCV Valve on 4.6 Engine ?

Thanks, Matt, for the information.
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Old 02-27-2007, 11:27 AM   #5
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Default RE: PCV Valve on 4.6 Engine ?

The nipple on the intake maniforld where the driver's side PVC hose connects has an orifice. This roughly meters the flow rate from the valvecover and crankcase. There's no real PVC valve to service or clean, although periodic cleaning of the hose and orifice might be a good idea.
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Old 02-27-2007, 01:18 PM   #6
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Default RE: PCV Valve on 4.6 Engine ?

Quote:
ORIGINAL: Mustang Matt

I think instead of having an actual valve like most PCV's in the past, our cars just have an unrestricted tubefrom the valve cover to the intake. So there shouldn't be a valve that can get stuck and cause oil leaks because of too much crankcase pressure.
That is correct and Stooge coverd the rest of it.

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Old 11-01-2011, 11:44 PM   #7
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Bumping this just to verify it's validity. No little rubber insert with a ball present in either the side of the crankcase? No means to clean whatever passes for one in our models, aside from what Stooge states, as in using a rag to clean any oil in that little opening?
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Old 11-02-2011, 07:41 AM   #8
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holy old bump wayneman
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Old 11-02-2011, 08:59 AM   #9
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My 2010 has a check ball in the drivers side valve cover vent. I know earlier ones had it too because I pulled it out for a custom venting the valve cover. I don't think there was any rubber in there but wont swear to it. If it were ever to get sticky a couple squirts of carb cleaner would clean it out.
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Old 11-02-2011, 10:24 AM   #10
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Quote:
Originally Posted by highline View Post
holy old bump wayneman
I R the king of necro-bumps. Easier for others to then find an [correct] answer with fewer threads.

Quote:
Originally Posted by 908ssp
My 2010 has a check ball in the drivers side valve cover vent.
See, that's what I thought. I'll have to do this later with some carb cleaner. I was a bit hesitant to start prodding the 2 spots with a small screwdriver.
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Old 11-02-2011, 10:24 AM
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