W203 C180k wet spark plugs

[MORGANpl]

Ive replaced today spark plugs. Two of them where wet. I have to say the car starts and runs mint. No problems at all. What could it be? Gasket? Piston rings?

 

[merc85]

wet with what?

 

[MORGANpl]

Looks like oil

 

[dozypillock]

Looks like oil

Did you sniff it? Some people give the throttle a "blip" before turning off. Not sure why, but can leave plugs wet. Nothing wrong with engine, but fuel sucked in when no spark.

Neil

 

[MORGANpl]

Did you sniff it? Some people give the throttle a "blip" before turning off. Not sure why, but can leave plugs wet. Nothing wrong with engine, but fuel sucked in when no spark.

Neil

I was thinking about sniff it but I got flu so couldnt do it

 

[grober]

Could be valve stem seals I suppose. Have a shufty down the spark plug holes with a small torch- if the top of the pistons in question are black also it might be a cylinder head gasket. Blackened surfaces inside the combustion chamber can be caused by deposits due to the cooling effect of the water. Any sign of oil in the coolant or a white scum under the oil filler car?
Other possibility would be sticking valves on the early engines.
M271: Cylinder head replacement - MBWorld.org Forums

 

[MORGANpl]

Could be valve stem seals I suppose. Have a shufty down the spark plug holes with a small torch- if the top of the pistons in question are black also it might be a cylinder head gasket. Blackened surfaces inside the combustion chamber can be caused by deposits due to the cooling effect of the water. Any sign of oil in the coolant or a white scum under the oil filler car?
Other possibility would be sticking valves on the early engines.
M271: Cylinder head replacement - MBWorld.org Forums

I didnt look it the coolant to see if there is any sigh of oil but when I look at the oil filler cap it was ok. Its 2007 so not the early engine.