so i decided to change my spark plugs. When i pulled them out, each one was covered in oil!!Do i need to replace the head gasket?if so is it pretty hard to replace it?
please help i dont know why they're covered with oil

 

a picture would help. but it could be from a headgasket, or also blowby on the rings. more likely blowby. if it was a headgasket, you would be burning water first. pull your rad. cap and look if you got oil in there. that will tell you for sure.