When they get noisy.
Usually the runners can be carefully removed using a thin screwdriver and the bearings should drop out. Replace the bearings and replace the runner by using a 30mm socket or press if you have one.
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.
It all depends on the bearings that you need to replace! Get some quotes! If it is bearings inside the engine, then the mechanic you go to is going to have pull the engine anyways, so if there are no other problem with your engine but some bearings then i would just have the bearing replaced, but if you have other problems due to the bearings going out, then i would replace the engine. Hope i helped
Boost pressure at full throttle under load should be about 37lbs.
5 hours
Always replace inner and outer wheel bearings on the same wheel at the same. You don't necessarily have to replace the bearings in both wheels at the same time, though it's not a bad idea, but always inner and outer on the same wheel at the same time.
If your wheel bearings have gone bad then you will have to replace the bearing ( cone ), the race ( or cup ), and the grease seal. The hub should not have to be replaced unless it was damaged as well as the spindle.
There is a detailed description of how to do this at the following URL. It is for a Saturn SL2, but should be similar for your Saturn Vue.http://www.ehow.com/how_5014553_replace-wheel-bearings-saturn-sl.html
The water pump should only be replaced when you hear signs of the pump failing, i.e: bearings on the pulley are squeaking.
Well, I would recommend replacing wheel bearings in cars around approximately two to five times a year because it ensures that the vehicles or automobiles work fine.
It can vary from $500 to $2000 depending on how many parts are needed.