Originally Posted by lawkd
Is that really okay? I mean, I guess it is, since you've obviously been very successful at this, but logically it seems like blue Loctite might be a better choice, or something that wouldn't be a lubricant?
I use a little grease on almost all metal-to-metal contact areas when assembling bike parts, I can hardly force myself not to.
Assuming the interference fit of the cups into the head tube is as tight as it should be, I don't think the grease will hurt a thing, at least it never has for me. I think if a headset cup is a little looser than ideal, it would be a good idea to use the type of loctite that's for assembling metal-to-metal parts (where threads aren't involved) instead of grease. But in my experience, I've never felt the need to use loctite, and a little grease hasn't hurt a thing-