5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Too much crankcase pressure

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Old 05-25-2008, 03:37 PM
  #1  
RawGtPower
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Default Too much crankcase pressure

Other than the PCV, what else could be causing me to be building up to much pressure in the crankcase. Im getting oil blowing out of my breather cap on my valve cover, and my oil stick keeps blowing out of the dipstick tube.
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Old 05-25-2008, 03:43 PM
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imnotmy77stang
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Default RE: Too much crankcase pressure

if you have a breather you shouldn't have a pcv valve - although thats not causing your problems. my guess? a cracked ring or that motor is just simply wore all to hell.
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Old 05-25-2008, 04:59 PM
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mjr46
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Default RE: Too much crankcase pressure

motor is worn out most likely... if the screen/mesh through which the pcv system draws vapors under the grommet is plugged up that to could cause it.....but perform a compression test while your at it to verify internal integrity
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