Oil in coolant tank

1998 CADILLAC CATERA
104,056 MILES • 3.0L • 6 CYL • AWD • AUTOMATIC
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TREVOR SITZER
  • MEMBER
  • 1 POST
There is oil in the water and it is a tan color.
Apr 14, 2017 at 10:31 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,407 POSTS
With no other details or information to go on, the best suspect is there is a transmission cooler built into the radiator, and it is corroded through and leaking. The clue is the transmission fluid will be a pinkish color.
Apr 14, 2017 at 12:10 PM
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