I don't know why you would remove all the oil on a valve before installing it. I'm no techy. All I know is that it will be luber later with silicone oil.
So if it has nothing to do with gluing, leaving a little oil on it will not hurt it's installation IMO. If it's too oiled, then rubbing it off might do. Again, I'm stepping in murky water here.
Vérificateur d'âge: Terrebonne