Low oil pressure, engine knock / noise.
Your question is very vague...is it how to remove bearings or how the replace bearings or how to size new bearings on an old worn shaft???? And what bearings??? There are several hundred bearings on a car...one kind of bearing on fishing reel...for or five bearings on a bicycle
go bak to scholl
There are three things that cause loss of oil pressure: worn-out oil pump, worn-out springs on the pressure control valves, and worn bearings. (Listed in order of expense to fix. Worn bearings means you've got to do an in-frame overhaul on your engine.)
Could be worn ball joints, worn steering linkages, worn/out of adjustment steering box and or worn/out of adjustment wheel bearings.
Worn Bearings
Worn engine parts. Rings, bearings, etc.
Usually caused by worn bearings.
Broken synchronizer, worn teeth, shift lever needs adjustment or bearings are worn.
When you change rotor or main ball joint, or when they get worn.
The part of the the piston rod that connects to the crankshaft have worn out or come out of place.
Worn bearings from high mileage, poor maintenance, abuse,
Typical of worn bearings....crank, cam and rod bearings.