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Oil found on spark plug :(

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JEDI

JEDI

Lifer
was changing my spark plugs on my 2005 Mazda3i (100k miles).

2nd plug i removed had engine oil on it 🙁

what does that mean?

How to fix?

What happens if i just put in new plugs and not fix it?
 
Oil on the tip/electrode or oil on the top area around the insulator?

If the oil is from the top, its a valve cover gasket as Arkaign mentioned, if its on the spark plug tip, you may have internal engine problems (valve guides)
 
CraigRT said:
Oil on the tip/electrode or oil on the top area around the insulator?

If the oil is from the top, its a valve cover gasket as Arkaign mentioned, if its on the spark plug tip, you may have internal engine problems (valve guides)
Click to expand...

there's oil on the spark plug thread, so i assume tip.
the top area is dry and still clean.

this is in cylinder #3 (if facing the hood, u go from passenger side to driver side.)

in mazda3, i think it fires from Plug #2? so i should be good if i just put the new spark plug into #3 and ignore the oil?
 
If it's on the threads and not on the tip, it's likely still coming from above, but at a very low rate. I would not worry about it honestly.

I don't see the problem in moving it to another cyl, but I don't think it's required either.
 
If there was oil inside the cylinder I would expect burnt crap all over that plug. If it's just on the threads it's probably flowing from the head down, not from the combustion chamber up. That's a good thing.
 
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