Oily residue on air plenum during spark plug change - normal? | Ford Explorer Forums - Serious Explorations

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Oily residue on air plenum during spark plug change - normal?

TXScott

Member
Joined
February 13, 2021
Messages
45
Reaction score
7
City, State
Houston, TX
Year, Model & Trim Level
2014 Explorer Limited
When changing my spark plugs, I went to replace the air plenum gasket and noticed a build up of oil residue(see photo). Is this something to be concerned about or pretty normal?

It was moist and came off easily with the rag, not hard, crusty or baked-on. I wiped it off before replacing the gasket and refitting it to the engine.

IMG_5278.JPG
 












Thanks for the tip, I also noticed some residue in the PCV when I replaced it as well as the throttle body which I wiped out, sounds like the likely culprit.
 






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