Oily Throttle Body

[mr_metropolitan]

Hey,

Hoping to get some more information on this. 2002 Coupe, 82k miles. The other day I was replacing my lower TPS sensor (under airbag) to fix an EML light and I figured I'd clean my ICV and throttle bodies while I had the airbox off. I noticed my cylinder 2 (second closest to front of block) throttle body has significantly more oil residue when compared to the other TBs. TBs 3,4,5,6 all look the same as TB1 below. Has anybody seen this before? Could it be a bad head gasket? Based on my googling it seems like it could be worn piston rings...

Thanks for your time.

See photos below.

Cylinder 1 (left), Cylinder 2 (right)


All Cylinders:

[Slideways]

You can check the spark plug for excess oil in the cylinder, but this is typically from oil vapor entering from the crankcase vent on the plenum. Looks pretty normal to me.

[maupineda]

Check the airbox, it may be dirtier on that side as it has the drainage to the oil pan. Cleaning the airbox every brake fluid change will keep all intake side tiptop.