Just bought some Viton orings for the timing and rotation sensors. They are better than oem imo as the cs is 2.0mm vs 1.74. They sealed perfect with no RTV.
https://www.amazonsupply.com/dp/B005RUQV10/ref=ya_vo_0_0
Robert
ps. I hate the new weblink tool as you cannot paste to the window over your text.