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While performing 30k miles maintenance taking the spark plus out the plug out of cylinder 2 was wet with oil on the threads. The electrode was dry and looked good. Is the oil a concern? Thanks for any information provided.

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Probably the cam ladder seal on #2 plug is leaking and ran down the threads as you removed the plug.

Did you blow out the spark plug wells with compressed air before you removed the plugs???
 

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I ran for 6,000 miles without a plug seal on one of the towers; had no idea 'til I opened it up for the next major service and found oil in the plug well.

Cheers,
-Kit
 
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