1997 Cadillac Concours head gasket

Tiny
LENVETTE
  • MEMBER
  • 1997 CADILLAC CONCOURS
  • V8
  • FWD
  • AUTOMATIC
  • 63,000 MILES
Can a defective head gasket cause a cylinder to run lean and miss with out showing any other signs of a leak
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Friday, August 7th, 2009 AT 11:28 AM

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Tiny
FACTORYJACK
  • EXPERT
It can definately cause it to miss, as the coolant doesn't burn. It would create more unburned fuel in the system, that may cause it to indicate rich. The coolant is also capable of contaminating the O2 sensor.
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Friday, August 7th, 2009 AT 10:18 PM

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