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Thread: 2000 catera pcv valve need help

  1. #1
    Join Date
    Jan 2005
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    2000 catera pcv valve need help

    Canadian resident ,bought my catera used in nov.2003...in febuary 2004 had to change valve cover gasket after engine emptied of its oil ,after starting engine in - 25 ' celcieus weather...again on dec.22 2004 gasket blow out engine oil pours out on -28 ' celcius weather ...this time i am being told that problem is due to pvc seperator that froze .so would net let pressure in crankcase exit engine ...has any body ever heard of this problem ? can you tell me if possible (cause and effect) ? could it be caused by another problem ? if so what ? even if its the pcv valve that freeze's what guaranty this will not happen the next time temperature drops below -25' ? need help and aswers. Thanks The kid

    Last edited by The kid; 01-11-05 at 07:41 PM.

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  3. #2
    Vesicant's Avatar
    Vesicant is offline Cadillac Owners Connoisseur
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    Re: 2000 catera pcv valve need help

    I know that not having a functional PCV valve can blow seals in the engine and this might just be the case. Have they replaced the gasket seals on the valve covers or the valve covers, or both? Having bad seals and at that temperature may be an issue.

    Check procedure:

    Disconnect the CV vacuum hose.
    1.Start the engine.
    2.Check for vacuum at the hose. If there is no vacuum, check for a plugged hose or a plugged manifold port. Check for a hose that collapses when blocked (vacuum applied). Replace the plugged or deteriorated hoses.
    3.Allow the engine to idle at the normal operating temperature.
    4.Remove the engine oil dipstick and install a vacuum gauge on the dipstick tube.
    5.Block off the CV system fresh air intake passage.
    6.Run the engine at 1500 RPM for 30 seconds, then read the vacuum gauge while the engine is running at 1500 RPM.

    If a vacuum is present, the crankcase ventilation system is functioning properly. No vacuum indicates that the engine may not be sealed and is drawing in outside air. Check the valve covers, the oil pan gasket, or other sealing areas for leaks. If the vacuum gauge registers a pressure or if the vacuum gauge is pushed out of the dipstick tube, check for a plugged CV housing, a plugged hose or for excessive engine blow-by.
    It sounds like it is what your mechanic suggests.

  4. #3
    Join Date
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    Question Re: 2000 catera pcv valve need help

    Reply to Jeffrey.

    Have replaced valve covers and gaskets...have also changed pcv seperator
    part number 90502186 ... are you aware of any technical bulletin's emited by GM to its dealer's regarding possible problems with this part in cold weather?

    And could you tell me what primary fonction a pcv valve has on my or anyother car ? is the primary fonction of the pcv to permit evacuation of pressure from engine or to recycle oil vapors?can a car operate without a pcv seperator or would engine blow seals every time you would start it if it does not have a pcv seperator ?

    Thanks for your help with my questions
    The kid

  5. #4
    matrixebiz is offline Cadillac Owners Member
    Automobile(s): 2008 CTS4
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    Re: 2000 catera pcv valve need help

    Hello, where is the PVC valve located and what does it look like?

  6. #5
    truemoparian is offline Cadillac Owners Member
    Automobile(s): 1999 catera (opel plant L81)
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    Re: 2000 catera pcv valve need help

    standing in front of car rear of the left head refer to. http://www.tonkinonlineparts.com/sho...ssembly=826616
    part number 11 is the seperator the top of intake part #42 is the source for pcv.


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