Oil on one spark plug

Tiny
ANTHONY ONGOCO
  • MEMBER
  • 2001 MERCEDES BENZ E320
  • 3.2L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 187,000 MILES
Changing spark plugs. One plug had oil on it. Not around electrode. Any ideas what happened? Thanks
Monday, February 12th, 2018 AT 3:13 PM

1 Reply

Tiny
MHPAUTOS
  • 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.
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Tuesday, February 13th, 2018 AT 4:22 AM

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