Mike, the sealant with the best success(about two years = 40k miles)was the 001 989 61 20 10 (last time I fixed it but just came back)I guess I'll try the same and be more careful cleaning the contact surfaces. Maybe brake cleaner and bamboo skewers to get at teh corners of the groove and do not forget to put a rag to stop anything from going into engine. Let you know later.