No specific temp, but you want the bearing and the race(s) to be at the same temp, especially if pressed in, or very close (read "import" in the U.S.) tolerances.
roller bearings are only needed if engine has roller bearings, u would replace bearings with same bearings that are in engine and cam specs
bearings are rated by temperature.
We need to know which bearings you speak of, there are many.
how to install bearing in 2006 hundai triburon
Pivot bearings are frictionless bearings and suitable for pivotal, angular, or oscillating applications. Collar bearings are often used install equipment with a simple set screw.
Rotating bearings.
They are sealed bearings which need to be pressed into hub. There is no fixing them- replace only.
Back or front?
Cam bearings, Rod and Main bearings. That will be all of the bearings required to replace when rebuilding a 350 engine.
Remove the tire and wheel. Remove the axle end cap. Remove the bearing seal. Remove the bearing. Reverse the process to install the new bearings.
You must remove the wheel bearings, inspect them, repack them with grease, and install them back in the vehicle.
the front wheels have no bearings