It is always Better AND SAFER to do everything COLD to hot. This way you have no shock to OIl or the Part. No drop in temp at all. It ALL comes up even. Then when everything is to temp Let it sit there for 15-20 min and you'll be fine a little longger will not hurt.I have been installing these gears for at least 20years now this way and have not Yet (Key word) Had any problems. And Like
Once said before IF?? you can put the cam in the
Freezer It to will help.But not always needed.
The Least alum. that is shaved out of the center
Of the Gear The Tighter the fit you will have.