to dissasemble wheel bearings you need a special socket after you remove 4x4 hub this special socket will only fit the front bearing nut .a different size is used on the rear
You must replace them they are sealed and cannot be serviced.
The wheel bearings are sealed and should last a long time. If you think they are bad you would have to replace the bearings they cannot be repacked.
Wheel bearings on 1995 Geo Prizms are sealed units and cannot be repacked with grease. You must buy new bearings to be pressed on hubs by mechanic with proper tools. If bearings are worn, replace ASAP before bearings start damaging hubs, you'll save bunches of money.
OK ... Here's the REAL answer: You cannot change the bearings on a Pontiac Sunfire. You must replace the "Hub-Assembly" they will be the same on both sides .
To change front wheel bearings on a 1976 four-wheel drive GMC Sierra, you have to use the proper tools. Either by a mechanic or yourself; but you are required to know the basics. Being that these bearings are sealed and cannot be repacked with grease. It is important to replace the worn bearings, with the new ones. Before they damage the hubs.
There are two bearings in an alternator. One (the large one) is a standard ball bearing arrangement. The other is pretty small and is a needle bearing type. Neither are really serviceable. You would have to disassemble the alternator to do it and by the time they need it the alternator is generally shot anyway. If you are hearing a squeal from that area it probably is not the alternator anyway. It is probably the belt tensioner next to the alternator and they cannot be repaired either.
The front wheels bearings are sealed in an assembly. You cannot replace the bearings, just the entire assembly. I priced out the units about 5 years ago and I was quoted anywhere from $150 to $225 each. I asked the parts suppliers if replacing them is a DIY job and most advised against trying it myself.
Floating bearings can move on the shaft fixed bearings cannot. If you search on Youtube for 'floating bearing animation' there is a short video showing the difference.
The wheel bearings in the 1996 and newer Taurus / Sables cannot be greased.See "Related Questions" below for information / procedures for replacing wheel bearings.
you cannot replace the wheel bearings by themselves in a 4x4. they designed the hubs to have wheel bearings inside them. you must replace the whole hub assembly to get new wheel bearings. should run from 50-100 dollars a piece from a parts store, and about twice that at a dealer. You need a 36mm socket and a breaker bar . Take the spline nut off the end of the cv shaft. I suggest doing this with the wheel still on the ground. Then jack the truck up. Remove the caliper and rotor, take out the three bolts holding in the hub. Be careful around the abs sensor. They are expensive. Installation is the reverse of removal. Torqe the spline nut to approx 180 ft.lbs.
In most cases wheel bearings cannot be repaired and must be replaced. Remove the tire and wheel. Remove the axle end cap. Remove the wheel bearing seal. Remove the wheel bearings. Reverse the process to install the new wheel bearings.
the front bearings on the 1989-thru-1997 ford thunderbird/mercury cougar cannot be changed, the whole front hub comes as one piece and have to be replaced as a single unit.