I have a 2001 Ultra and am going to be putting my inner primary back on. What and where should I use to seal the 5 bolts that are inside the primary? It looks like there was a small amount of sealant where the bolt holes mate with the engine case and the transmission.

 

Thread Sealant
Or 3M 5200.

 

RTV on the bolt shoulder

 

If the bolts don't have a rubber o-rings on them (not sure what year they started using them)the manual says to use Permatex "ultra black" its a maximum oil resistant sealer.

 

Lots of sealant options. Make sure you remove all the old sealant and there is no oil in the bolt bore; it will not compress and some have blown out the bottom of those bolt holes. Chase the threads with a thread chaser if you have one, if not, use a tap and blow the hole out. Thread chaser is better than a tap an the chaser isn't meant to cut threads but a tap is OK, just don't do it every time.

 

I've used 3 bond case sealer, the black and red high temp sillycone. All work fine for this app. I don't bother with the thread chasing but use a small nylon brush on a drill and a little brake-clean. I blow out with a compressed air skinny nozzle that fits down inside the holes.