1997 Cadillac Deville Rough Start - Oil on Spark Plug

1997 CADILLAC DEVILLE
150 MILES • V8 • 2WD • AUTOMATIC
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CLIFFY
  • MEMBER
  • 2 POSTS
Car was starting rough so I changed the plugs and the wires.

While doing so I noticed oil on the #6 plug

Is this the problem and what does oil on the plug mean?
Apr 26, 2009 at 4:07 AM
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DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Was oil on the electrode? if yes worn valve guides or worn oil ring.
Apr 26, 2009 at 7:22 AM
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CLIFFY
  • MEMBER
  • 2 POSTS
Oil on thread not electrode
Apr 26, 2009 at 7:58 AM
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DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Then you have a valve cover leaking oil down on plug.
Apr 27, 2009 at 8:51 AM
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