Replaced the fuel injectors tonight and in the process decided to change out the valve cover gaskets. The passenger side exhibited signs of a valve cover leak as the spark plugs on that side would have oil on the threads when taken out.
This is a 2002 F150 with 155,000 miles. I have been religious about 5k OCIs with a FL-400S and either Motorcraft 5W-20 or Trop Artic 5W-20. (toss in some 5W-30 on occasion if it was the only thing available)
What would cause this?
Driver Side:
Passenger:
This is a 2002 F150 with 155,000 miles. I have been religious about 5k OCIs with a FL-400S and either Motorcraft 5W-20 or Trop Artic 5W-20. (toss in some 5W-30 on occasion if it was the only thing available)
What would cause this?
Driver Side:
Passenger:
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