Brandon Peterson or anyone,

What is the proper Loctite number for sealing and locking the fine threads on the Rotax 912 water pump housing elbows when they are repositioned? I know Kitfox factory does this for customers, but they are closed now. Actually I need to reseal an upper coolant elbow that goes into the cylinder head to fix a leak, but I know its the same Loctite that is used on the water pump elbows.

I have been all thru the Rotax Heavy Maintenance manual, but there is a confusion between Loctite 243 and 648.