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Spark plugs

Tiny
KOURTEEB_1224
  • MEMBER
  • FORD F-150
I own a 1996 Ford Mustang GT, it has about 150000 miles on it, it is a V8, and is a 4.6 L. It stated missing really bad so we were going to change out the spark plugs on the car. When we went to pull out the spark plugs the four on the drivers side had oil in them but the other four did not have oil in them. What could be causing the oil to leak?
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Tuesday, April 10th, 2007 AT 9:30 PM

2 Replies

Tiny
BACKYARDMECHANIC
  • MECHANIC
  • 337 POSTS
The plugs have oil on them due to poor oil control which is caused by leaking rings or value guides. This is often common on motors with high mileage or motors not properly maintained. Using a hotter plug may temporarily relieve the problem, but the motor probably needs to be rebuilt.
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Wednesday, April 11th, 2007 AT 8:34 AM
Tiny
PEPPERMRJ
  • MECHANIC
  • 1,158 POSTS
Was the oil on the exterior of the plug or the electrode? Poke a q-tip down the plug hole with the plugs in and see if it comes back oil soaked. Sometimes a valve cover leak will flood the spark plug holes. This will in turn cause misfires. Simple remedy is to replace the valve cover gasket.

Good luck and let us know. :)
peppermrj
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Wednesday, April 11th, 2007 AT 2:53 PM

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