1997 Cadillac Concours head gasket

Tiny
LENVETTE
  • MEMBER
  • 1997 CADILLAC DEVILLE 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
Friday, August 7th, 2009 AT 11:28 AM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
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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