Oil on one spark plug

2001 MERCEDES BENZ E320
187,000 MILES • 3.2L • 6 CYL • 2WD • AUTOMATIC
Avatar
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 3:13 PM
Advertisement
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
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 13, 2018 at 4:22 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.