Effects of a bad valve cover gasket?
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    NECO Member whitecat99's Avatar
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    Effects of a bad valve cover gasket?

    Obviously an oil leak will be the main problem with a bad valve cover gasket. I am wondering if it will effect the way the engine runs in any way. I know some engines will run bad when there is any kind of bad seal. A bad seal will allow air to get into engines that have negative pressure in the crank case. This effects the regulated air flowing through the PCV valve and in turn the tuning of the engine.

    Does anyone know if the 2.5 L Cougar engine has any issues with a bad seal other than an oil leak?
    White 99 Sport Cougar with 2.5L ATX - Purchased May 98
    Stock except for 16 inch Mangels chromed aluminum alloy wheels with 225-50 BFG g-force Sport-Z tires, K&N drop in filter and tinted windows.
    Wide open until you see God, then Brake!

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    NECO Member whitecat99's Avatar
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    Re: Effects of a bad valve cover gasket?

    Well it looks like I either used a bad title or no one knows any more about it.
    White 99 Sport Cougar with 2.5L ATX - Purchased May 98
    Stock except for 16 inch Mangels chromed aluminum alloy wheels with 225-50 BFG g-force Sport-Z tires, K&N drop in filter and tinted windows.
    Wide open until you see God, then Brake!

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    3 wheelin Lifetime Platinum MemberModerator jaged's Avatar
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    Re: Effects of a bad valve cover gasket?

    you basically answered your own question. If unregulated air gets in there it will run wrong.

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    is a pop sensation Lifetime Platinum MemberModerator sonza68's Avatar
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    Re: Effects of a bad valve cover gasket?

    I have dealt with a Cougar that had leaking valve cover gasket, and it didn't seem to make the car run poorly, but it did leak a lot of oil. I wouldn't rule out the possibility though. If the leak is bad enough, I'm sure you could get unmetered air into the engine.
    Just because I don't care doesn't mean I don't understand.

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    NECO Member whitecat99's Avatar
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    Re: Effects of a bad valve cover gasket?

    Well, I guess I will find out when I replace the valve cover gaskets. Right now I have an almost unnoticeable stumble at certain conditions when the engine is under a light load. This seemed to develop as the oil leak started.
    White 99 Sport Cougar with 2.5L ATX - Purchased May 98
    Stock except for 16 inch Mangels chromed aluminum alloy wheels with 225-50 BFG g-force Sport-Z tires, K&N drop in filter and tinted windows.
    Wide open until you see God, then Brake!

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