I forgot to answer your direct question, Is the heat required, not really... it kinda falls in the column of work smarter not harder. You might as well get used to it now out of the gate, your gunna have to trust your gut on matters such as these. So goes the life of riding.
Get a puller and combine your information to make it as easy as possible. ie... that is gunna need some soaking in penetrating oil to break lose without much fuss.