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.

Dipstick pops out ?

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Old 06-23-2007, 03:03 AM
  #1  
TTGreenSN95
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Default Dipstick pops out ?

went to track and ran 14.20 no juice
the dipstick keeps pooping out??????
how do I keep this from happening lol
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Old 06-23-2007, 03:05 AM
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Lysawy
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Default RE: Dipstick pops out ?

either loose dipstick or check pcv valve .. excessive blowby....
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Old 06-23-2007, 03:19 AM
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1991LX5.0
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Default RE: Dipstick pops out ?

too much crankcase pressure either bad/clogged PCV or worn piston rings
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Old 06-23-2007, 05:19 AM
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94IVGT
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Default RE: Dipstick pops out ?

ive had this prob on my sc 94 5.0. replace the pcv and the metal screen under it and replace the oil fill cap with a push in breather. that should fix your problem unless youv got a HG going out. lets hope thats not it
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Old 06-23-2007, 07:51 AM
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PRO50SC
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Default RE: Dipstick pops out ?

Try running a breather in your oil cap location.
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Old 06-23-2007, 10:39 AM
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5.0stanger
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Default RE: Dipstick pops out ?

I was going to say that by putting a breather in would cause a vacuum leak, but if you have that much blow by already, it would act like a vacuum leak already so I guess it would be worth a try.
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Old 06-23-2007, 12:54 PM
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w8less
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Default RE: Dipstick pops out ?

i had the same problem i couldn't get a breather that would fit properly so i drilled holes in the factory oil cap problem solved
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Old 06-23-2007, 12:55 PM
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TTGreenSN95
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Default RE: Dipstick pops out ?

well it only does it at the track and the head gaskets and the pcv are new????
thanks for ansering so a breather would cause a vacuam leak i ddint know that i was going to try that to....
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Old 06-23-2007, 01:01 PM
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JD1969
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Default RE: Dipstick pops out ?

ORIGINAL: 5.0stanger

I was going to say that by putting a breather in would cause a vacuum leak, but if you have that much blow by already, it would act like a vacuum leak already so I guess it would be worth a try.
*sigh*... breather will NOT cause a vacume leak. Vacume leaks can onlyhappen on the INTAKE side of an engine.
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Old 06-23-2007, 01:02 PM
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w8less
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Default RE: Dipstick pops out ?

well you have to get that pressure out. if not its going to go somehwere. mine cuased my brand new engine to have a rear main seal leak a bad one.
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