I worked in the development lab at GE developing, building and testing the transmission used in the US Armies Bradley Fighting Vehicle.
Liquid nitrogen and was used to shrink parts at a temperature of -300 degrees and an oven was used to heat housings to +300 degrees to obtain very tight shrink fits on bearing supports that were mounted in aluminum housings. This was to ensure there was absolutely no possibility of movement when the transmission was operated under high stress with oil sump temperatures approaching 300deg F.
Tapered roller bearing cones & races can be heated or cooled to plus or minus 300 degrees to fit into a bore or on a shaft. Ball bearings can be heated to 300 degrees to install on a shaft, however a ball bearing assembly can be damaged by extreme cooling because internal stresses develop due to unequal shrinking of inner and outer races causing most certain failure.
For installing cylinder liners cooling may be all that’s needed, it depends on how the manufacture designed it. The degree of shrink depends on the application.
Chilling a liner and heating a cylinder block to obtain additional assembly clearance just makes the job easier and it gives you more time to properly install and seat it.
It’s usually a bad thing to get something ½ installed and then resort to force to finish the installation.
Heating and cooling parts allows you to put the blocks of wood and hammers away making assembly very easy with no danger of damaging parts in the process.
One last note is to hold the item being installed captive until it becomes tight otherwise is could creep out of position as the fit comes together.
All parts were clean & dry due to the extreme temperatures.
90cummins