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Anonymous
Anonymous Posted on Sep 03, 2011
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My VW passat is using oil but its not leaking ? What might be the cause

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  • Master 1,623 Answers
  • Posted on Sep 03, 2011
Anonymous
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The oil is probably being burned by the engine and going out the exhaust. Reasons for this are:
Bad valve seals
Worn valve guides
Pressurized crankcase due to a clogged PCV valve or breather system
Blow-by from worn piston rings & low cylinder pressures.

I hope this answers your question.

  • Anonymous Sep 03, 2011

    Thanks so much !

    Can I change the PVC valve myself ? I am handy, how can I troubleshoot to see which of these is the problem ?

  • Anonymous Sep 03, 2011

    Yes the PCV valve is simple. It will be located in a rubber gromet in the engines valve cover. It will have a house attached that runs to the manifold.

    The others are more complicated and require special testing equipment.

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