2003 Cadillac CTS

2003 CADILLAC CTS
110,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JOHN STRUMKE
  • MEMBER
  • 1 POST
When I turn on the heater I smell oil thru the vents
Nov 7, 2009 at 12:37 AM
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FACTORYJACK
  • ✓Experienced Mechanic
  • 4,159 POSTS
I would speculate that you have engine oil leaks, and the vapors are being pulled through the inlet. Often times what is most common, is the valve cover gaskets that leak right on to the exhaust manifolds.
Nov 7, 2009 at 3:50 AM
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