Oil on one spark plug

2001 MERCEDES BENZ E320
187,000 MILES • 3.2L • 6 CYL • 2WD • AUTOMATIC
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ANTHONY ONGOCO
  • MEMBER
  • 1 POST
Changing spark plugs. One plug had oil on it. Not around electrode. Any ideas what happened? thanks
Feb 12, 2018 at 7:13 AM
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MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
If the spark plug is through the rocker cover there will be a failed seal as part of the rocker cover gasket. it is normally part of the rocker cover gasket set but ask your supplier if this is the case before purchasing.
Feb 12, 2018 at 8:22 PM
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