Heat or cool PS pulley for installation?

Mercutio

SCCoA Member
This one always gets me. I'm trying to make the hole bigger, so I'm guessing I need to freeze the pulley, but I'm not sure. Any input?
 
power steering pulley,it should go on hard, when trying to put on. If it won't go on, solve that first as if you heat it to expand it on, it could be really hard to get it off.

To make it easier to go on, stick it in the oven at 350 for 1 hour. Then use oven mits to put it in place and slide it on with the proper tool. It'll go much easier on.
 
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