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oil in radiator over flow tank

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by glen raymond parsons, Oct 25, 2012.

    i have found oil in radiator overflows tank what would cause this
     
  1. oigle

    oigle Senior Member

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    Your Mercedes:
    Currently 2003 ML270. 2012 Nissan Maxima 250SL.
    Presuming it is engine oil and nobody has put any oil in the rad system by mistake, the most common reason for this is failure of the head gasket in the area of the oil passage through to the overhead gear. Is there any sign of water in the sump? It is usually a one way affair as oil pressure is higher than water pressure.
     
  2. Some guy on the internet

    Some guy on the internet Senior Member

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    Does the engine or tranny oil run through the main rad for cooling on these? If yes, might just be a duff rad.
     
  3. wireman

    wireman Senior Member

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    nice 201 2.5D 1993 & very nice 129 SL500 1994
    Pink sludge with ATF.
     
  4. mattuk

    mattuk Senior Member

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    Your Mercedes:
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    For how long did you own the car before noticed oil in coolant tank?
     

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