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Oil in coolant reservoir

I did the PM Service and then checked fluids and found oil in the coolant reservoir, I'm thinking a bad head gasket or what can be bad on this engine (4Y engine) any ideas.....
  • Posted 27 Feb 2020 18:59
  • By Carlos_Ramirez
  • joined 27 Feb'20 - 1 message
  • Utah, United States
Carlos R
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Carlos, if your finding oil in cooling system, more often than not its the transmission oil cooler in radiator
  • Posted 28 Feb 2020 14:15
  • By James_Lott
  • joined 28 Feb'20 - 9 messages
  • Georgia, United States
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