24
Sep
It was the bearing cartridge that would fail and would literally fall apart in your hand when you took it out. For the repair to be successful you must first determine why the previous bearing failed.
If you just replaced a wheel bearing recently or within the last year it should not fail again for the cars life unless damaged from an accident or the seal has failed due to poor installation or a manufacturers defect.
Why do wheel bearings fail. 3 Reasons Why Wheel Bearings Fail Poor installation Damaged wheel bearing seal Damage from an accident. If you just replaced a wheel bearing recently or within the last year it should not fail again for the cars life unless damaged from an accident or the seal has failed due to poor installation or a manufacturers defect. When a wheel bearing wears out it is usually a case of inadequate lubrication faulty installation or improper adjustment.
For the repair to be successful an experienced mechanic must first determine why the previous bearing failed. For sealed hub units examining the internal bearings and races is impossible. Looking inside a worn-out bearing there will often be small specs of metal that have broken off from inside the bearing itself and are grinding their way around the racers causing more damage.
According to the TSB the rear wheel bearings may develop a noise over time but that it does not affect the performance or life of the wheel bearing. Your local Subaru dealer or Subaru Corporate 18007822783 can advise whether your specific vehicle is covered under the rear wheel bearing extended warranty program. Why Do Bearings Fail.
To really understand bearing selection its important to first understand how they can fail. While the underlying function is always similar different bearing types proliferate because different applications and operating environments place very different stresses on bearings. In the old days bearing replacement on non-drive wheels was fairly easy if the race was still in good condition which was usually the case.
It was the bearing cartridge that would fail and would literally fall apart in your hand when you took it out. Causes of wheel bearing failure. They lubricate and seal wheel bearings when they are manufactured.
Petroleum based lubricants generate pressure when they are agitated. Engineers design wheel bearing seals to allow this pressure to escape. Unfortunately wheel bearing seals are not designed to be water tight.
When a bearing wears out it is usually a case of inadequate lubrication faulty installation or improper adjustment. For the repair to be successful you must first determine why the previous bearing failed. For sealed hub units examining the internal bearings and races is.
Interesting about the wheel bearings. I have had 87 cars and trucks in my lifetime. The only wheel bearings that ever failed on any of them was the front 2 on my 1971 Ford F-100.
And that was in Alaska when the weather was -60 below zero. I replaced them and used arctic wheel bearing grease on the new ones. Its very difficult to detect a failing wheel bearing because it happens infrequently and when they do wear out it can happen fast.
That being said one warning sign of a worn out wheel bearing is a loud grinding or roaring sound coming from the tire area of your car. This is caused by excess heat that has built up inside the wheel bearing and lost most of its lubricity. The main reasons that a wheel bearing fails are.
Faulty installation inappropriate tools such as a hammer or an impact wrench can cause damage to the exterior and or interior of the wheel end bearing causing the wheel bearing to fail prematurely. The second scenario is loss of the wheel and hub assembly after a bearing has failed. Most commonly these failures are related to improper or deferred maintenance of the axle involved.
Roller Bearings are subdivided into many different classes. Maximizing longevity means bearings must be properly installed lubricated and maintained. Oarticularlv moist or contaminated areas.
Ind improper handling practices invite premature bearing - failure. When a bearing does fail it is important to determine the exact cause so apprcipriate adiusfments can be made. Additionally a damaged wheel bearing puts a lot of stress on the hub the CV joint and the transmission itself.
What can happen if you have a bad wheel bearing. A bad wheel bearing can cause several potentially dangerous situations starting with your vehicle not being as responsive as it should be. Bill discusses the two most common causes of bearing failures and distinguishes between failure and distress.
HI everyone I have a 2008 Honda 420 FM. Last summer I replaced the front wheel bearings and put about 500 kms on it before they failed. I replaced them both this winter and I put about 1000 kms on the bike and now they are shot again.
A potential cause for bearing failure is the castle nuts being over tightened. Castle nuts should be just slightly more than hand tight. If too tight this will put excessive pressure on the bearings and could lead to premature failure.
I suggest an inspection of the tires on the affected wheels.