Is it smart to replace both wheel bearings?
Replace both while you’re at it to save time. Neither is a wrong way to look at it. Some subscribe to #1, others #2. Me personally, as someone who has worked on cars for decades, I go with #2 always, with my personal vehicles. Why ? I had my 1986 Jetta for 15 years and 250,000 miles.
What causes a front wheel drive wheel bearing to fail?
A front-wheel-drive wheel bearing. Note the two-piece inner race. The most common causes of wheel bearing failure are 1) out-of-balance wheels, which a wheel balance job will fix, and 2) out-of-round tires, which a wheel balance job will not fix; the tire must be replaced.
What do you need to replace FWD wheel bearings?
Special Tools Needed to Replace FWD Wheel Bearings Three special tools are needed to perform this job at home: 1. A FWD wheel hub puller with a slide hammer (see (A) below).
What kind of noise does a bad wheel bearing make?
Mike, Bad wheel bearings are usually associated with humming noises, not grinding sounds. Grinding noises usually have more to do with brake problems rather than wheel bearings. Try reading our article about brake noise to see if that is the problem you are having.
When to replace front wheel bearings on Mercedes Benz?
If you are starting to hear a low rumbling sound from your front end or your W123 has over a 100,000 miles on it, you should inspect your front wheel bearings for replacement. As the mileage increases on the car, heat and lack of lubrication can cause the bearings to wear and possibly fail.
Do you need to grease a front wheel bearing?
People tend to grease up the spindle; you do not need to grease the spindle as the bearing is designed with an inner race that sits on the spindle. The bearing should turn around the races and not the spindle. You are going to need to remove the five 10mm Allen bolts that attach the rotor to the hub (red arrow).
Where do you put the inner bearing race on a Mercedes?
Take the new inner bearing race and place it in the bore on the rear of the hub. Mercedes makes an expensive tool to seat the race but you should be able to use the old race to help seat it. Another word about grease. The packet of grease that comes with the kit is all the grease you need to install the two bearings.