Re: Distractions...
The immediacy of IM slows everyone down whereas with an email you have to spend time composing it saying what you've tried and have discounted.
I will happily help but I'm not going to spend all day taking quieres due to a chronic lack of documentation. Anyway, by not being immediately available, I find that many questions get answered by themselves.
The manager is a workaholic who doesn't believe in documentation, but I am not. If that doesn't make me an asset, so be it. I'm way past that threat, as should most people who have spent more than a decade in IT.