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Thread: Oil Catch Can

  1. #1
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    Default Oil Catch Can

    I am new to the C6 corvette. How important is it to install an oil catch can to the LS2 engine?

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    Oil Catch Can Tuna's Avatar
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    Just what is an "oil catch can" supposed to do?
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    Technical Advisor c4c5specialist's Avatar
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    Quote Originally Posted by Tuna View Post
    Just what is an "oil catch can" supposed to do?
    Hi there,
    An oil catch can is supposed to collect excess oil vapor that is pushed out of the fresh air vent of the PCV system during high RPM operation.
    It condenses inside, so it doesnt condense inside the throttle body and get burned by the engine.

    All engines run at higher RPM constantly will have this condition and its completely normal.

    Do you need it? No.

    Allthebest, c4c5

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    You'll only need it if:
    You have an extra quart of oil during competition (as per the manual) or
    You have "sustained high RPM" use.
    It was installed because some owners have had their charcoal vapor absorbent decals come loose and foul the MAF/intake tract. Also, the oil may cover the MAF sensor and then it sends corrupted info to the computer. Then you car won't run too good.

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    Quote Originally Posted by c4c5specialist View Post
    Hi there,
    An oil catch can is supposed to collect excess oil vapor that is pushed out of the fresh air vent of the PCV system during high RPM operation.
    It condenses inside, so it doesnt condense inside the throttle body and get burned by the engine.

    All engines run at higher RPM constantly will have this condition and its completely normal.

    Do you need it? No.

    Allthebest, c4c5
    I Agree....Plus there mostly used on Vettes that are supercharged or turbocharged

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    Member Edmond's Avatar
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    Default

    I picked one up for my Z. I think it was about $40. Only installed it a few days ago and there are a few drops of oil in there.

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    Technical Advisor c4c5specialist's Avatar
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    And a NOTE:

    Oil will NEVER EVER contaminate the MAF sensor from the fresh air side of the PCV system.

    Oil contamination comes from people who overoil the oiled gauze type aftermarket air filters.

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    Typically, c4c5specialist is dead-nuts accurate on this. If you're having trouble with oil and the MAF, you either are way "over-oiling" an oiled-cotton air filter or (not very likely) the engine has a serious blowby problem in combination with a faulty PCV system.

    If you use an oiled-cotton filter, follow its manufacturer's instructions for cleaning and oiling and you won't have MAF troubles.

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