Isn't that nice? Much more complicated than it needed to be, this oil cap has some teeth in it that ensure it can only be tightened to a specific torque, after which it will make a ratcheting "click click click" noise as it is tightened. The teeth are angled such that when you remove it, they interlock and will not ratchet.
The problem is, all of these pieces are plastic. And it's all broken.
Here is how I got the fill cap off after it broke:
And here is what I ordered from Amazon to replace it:
The new piece is solid plastic with a rubber o-ring. It will not split in half.
