Maybe it's been covered and I missed it... if yours isn't leaking around the spark plug tube seals, they are a royal pain in the *** to remove. After consulting youtube I cut them using a pocket knife. You cant really just cut them in a circle being hard plastic but you can push a blade in and work your way around just pushing the blade through, you'll hear a crunch. I used my el cheapo pocket knife, I dont think I'd recommend the razor blades where a section can be snapped off. Once I went around all 3 the cover basically popped right off. I wasted a good 15-20 minutes screwing around with it before that. Once the cover is off I used a rag to grip the remaining material on the spark plug tube and twisted/pushed/pulled a bit and they broke free.