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Thread: oil leak

  
  1. #1
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    Shahid's Avatar
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    oil leak

    Hope someone can help, I've had a problem with a leaky rocker cover for a while, however I could never understand how so much oil was being dropped when there was only a minimal leak from the rocker cover. Well over this weekend I have spend hours and hours refitted the rocker cover gasket and cleaning the shhit load of oil that had coated everything in the engine bay. Just been out to inspect and can see a small amount of oil rolling down the cambelt cover just below the thermostat housing.
    Does anyone know what could be causing this oil leak, I haven't driven the car since fitting the new seal on the rocker cover and thoroughly cleaned the engine.
    This looks like fresh oil, thinking about putting some oil stop leak stuff in the oil and take it to my mechanic on the weekend.

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    Bad Ass Astra's Avatar
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    Surely it can't have leaked if you haven't even driven it.

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    wouldnt use that oil leak addative personally,

    what thermostat? the one on the water pump housing???

    MK4 1.8 16V Sport and MK5 CDTi Estate




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    I wasn't sure about the additive myself, but I didn't want to have a filthy engine bay again before I could get the leak looked at. Most mechanics wouldn't want to even start trying to diagnose the leak if the engine is coated in oil. I spend hours and alot of degreaser to clean it.

    The thermostat housing (or atleast thats what I'm assuming it is) is where the top hose from the radiator goes into. The oil seems to be coming from behind there somewhere.
    Is there an oil seal somewhere in that region?

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