loosing oil new pcv and breather

Discussion in 'Technical' started by justin has a 74, Feb 18, 2010.

  1. justin has a 74

    justin has a 74 Maverick bandit official

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    replaced my pcv and oil breather about 2 weeks ago and i thought my oil leaking problems were over, i was wrong:mad:

    What else should i look for, could the pcv valve be plugged:hmmm:
     
  2. justin has a 74

    justin has a 74 Maverick bandit official

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    someone said something about the airfilter being old:D
     
  3. justin has a 74

    justin has a 74 Maverick bandit official

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    [​IMG]i have something like this

    Read on the internet that it will cause your engine to run poorly which it has been doingtoday by stalling on me when i go to stop.
     
    Last edited: Feb 18, 2010
  4. Mavman72

    Mavman72 Gone backwards but lookin' forward

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    Is is visibly leaking out or is it being consumed???
    Do you have blue smoke coming out the tail pipe???
    Does it leave a puddle on the ground???
     
  5. darren

    darren Member

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    This would work on the fresh air side of the PCV. Your valve and vacuum hose goes on the other rocker cover. If you remove that fresh air filter from the rocker with the engine running a piece of paper held just over the opening into the rocker cover should be drawn down onto the hole in the rocker. If it blows the paper away from the hole you have a problem. Either PCV isnt functioning or you have excessive blow by.
    As far as stalling I assume you have no heated air intake. Carbs have a bad habit of icing up this time of year causing stalling.
     
  6. justin has a 74

    justin has a 74 Maverick bandit official

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    i popped open the hood and found oil comming out of the breather. I donot have blue smoke comming out of the exhaust.

    And it doesnt leave a puddle on the ground. it hits the headers and burns away. valve cover is covered in oil.

    My breather is ment to go on the valve cover itself, i just wanted to show you what the top half looks like, should i get the fancy chrome one?

    darren, where is the fresh air side lol
     
  7. darren

    darren Member

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    http://www.my5oh.com/tech/pcv.jpg


    The breather you have goes in place of the one in the pic that runs to the air cleaner. Thats the fresh air side of the PCV. Clean air enters through your PCV breather to replace the fumes drawn into the PCV valve and intake.
     
  8. justin has a 74

    justin has a 74 Maverick bandit official

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    so..... my setup is right, breather on one side pcv on other going to intake.
     
  9. mavgrab302

    mavgrab302 MCCI Florida State Rep

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    I was having the same problem, is your pvc mounted to the rear vaccum port on the carb ? crank case needs negitive pressure to work right... mine was hooked to the base of the air filter and had blow by, the oil was dripping out of the breather/oil fill all over my valve cover and headers... make sure its hooked to a good vaccum sorce
     
  10. justin has a 74

    justin has a 74 Maverick bandit official

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    it is mounted in the intake, should i switch it to the carb? i recon it has to be the pcv valve.
     
  11. Dave B

    Dave B I like Mavericks!

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    The PCV should be attached to the base of the carb, what carb do you have?
     
    Last edited: Feb 18, 2010
  12. justin has a 74

    justin has a 74 Maverick bandit official

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    650 holley.
     
  13. darren

    darren Member

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    Do that paper test I posted.
     
  14. cdeal28078

    cdeal28078 Member

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    YOu could also have the wrong PCV valve. If the weight inside the valve is too heavy the vacuum signal can't over come the weight and it will not open thus not allowing it to pull a vacuum onthe crankcase.
    I am having trouble with the PSV valve on the 460 in my F100. I have oil working up the dip stick. I think I have the wrong PSV valve and am trying to figure out how to determine what valve to get
    clint
     
  15. Bryant

    Bryant forgot more than learned

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    didnt you just change your vavle covers?
    is there a bafel on the valve cover under the breather?
    when you look through the breather hole can you see the rocker arms?
    if you can then you dont have a bafel and the rocker arms are shooting oil right out the hole.
     

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