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-   -   Oil covered plug???? (https://www.miataforumz.com/na-1989-1997-8/oil-covered-plug-803/)

DROPTOP Mar 13, 2012 11:20 AM

Oil covered plug????
 
Hey guys, 91 1.6 liter third plug back is covered in oil. Starts to miss every three or so weeks and when I check plugs that one is covered with oil. Change plug and all is fine for a few weeks. What y'all think, rings or.......?

RedTurboMiata Mar 13, 2012 11:21 AM

have a compression and leakdown test ran, may be rings or headgasket, or even valve seals.

Track Mar 13, 2012 11:36 AM


Originally Posted by DROPTOP (Post 13741)
Hey guys, 91 1.6 liter third plug back is covered in oil. Starts to miss every three or so weeks and when I check plugs that one is covered with oil. Change plug and all is fine for a few weeks. What y'all think, rings or.......?

the plug is covered in oil...on the inside (ie electrode and ground) or on the outside?

Tallgeese Mar 13, 2012 01:22 PM

Valve cover gasket.

I didn't change mine for nearly 130k miles. I had two plugs covered in oil. Motor is still fine.

jtpaintballwdp Mar 13, 2012 02:02 PM


Originally Posted by Tallgeese (Post 13765)
Valve cover gasket.

I didn't change mine for nearly 130k miles. I had two plugs covered in oil. Motor is still fine.

This, if the outside is cover in oil. Same deal about 130k and my plugs would be covered.

MF-Brain Mar 13, 2012 02:03 PM

threads or electrode?

DROPTOP Mar 14, 2012 10:05 AM

Threads and electrode....

Track Mar 14, 2012 10:30 AM

Valve Cover. feel the sides of the plug hole, does it have oil on it?

aaronc7 Mar 14, 2012 08:04 PM

i had this- was valve cover gasket.


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