Press fit bb assembly-grease, paste or nothing?

[rafletcher]

About to install my first press fit bb. She'll is plain carbon, no metal sleeves. So do I use grease, or carbon assembly paste, or just assemble it dry?

[Tewdric]

Nothing in a carbon shell.

http://www.parktool.com/blog/repair-help/bb90-bb86-bb92-etc-bottom-bracket-service

[rafletcher]

Ah, and I'd skimmed that article earlier today! Thanks 

[chrisbainbridge]

I found that my press fit in a similar situation squeaked just a little in the dry.  I therefore took them out and used a little Loctite smeared round the mating surfaces and it has been fine ever since.

[jsabine]

Speaking from a position of total ignorance, if the idea is to prevent creaking due to movement, I'd have thought that a smear of assembly paste would be a good idea.

Grease on carbon, clearly not, but what's the score with threadlock - is that a bad thing with carbon too?

[rafletcher]

I've asked Hope (for it is their BB I'm using) to advise. Might also call Primera (from whence the frame came) to see what they say too.

Edit: Hope say they use a "medium viscosity grease Mobil XHP222".

[Tewdric]

Speaking from a position of total ignorance, if the idea is to prevent creaking due to movement, I'd have thought that a smear of assembly paste would be a good idea.

Grease on carbon, clearly not, but what's the score with threadlock - is that a bad thing with carbon too?

I wouldn't.  Carbon composite assembly paste shouldn't hurt and might prevent creaks, although one that is installed squarely into a quality shell shouldn't squeak in the first place.