Oil in Coolant

4 replies to this topic
  • buzzfin

Posted February 28, 2009 - 03:46 PM


Noticed that my coolant seems to have a black residue in it. Seems to look like (and smell like) oil in the coolant. Would this be caused by a bad head gasket? NOT getting any milky white substance in the oil, which I would think would indicate a bad head gasket.

  • TIG88

Posted February 28, 2009 - 04:47 PM


probably a headgasket. I have seen stopleak look kind of similar to oil in the coolant though.

Flush it and ride it easily for 15 mins. If its bad you'll know then.

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  • yz400fsmasher

Posted March 01, 2009 - 03:59 PM


if it was oil in the coolant it would be white not black.

  • FinchFan194

Posted March 01, 2009 - 05:00 PM


If it were oil in your coolant and your oil was black (dirty) I would think it would be black not white.

  • buzzfin

Posted March 02, 2009 - 07:46 AM


Checked again after a ride yesterday and it's definitely a black residue in the coolant - looks and smells like oil. Also getting a lot of oil blow by out of the breather hose. Thinking it might be time for a top end.

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