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Old 07-31-2018, 03:31 PM   #1
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Should a new wheel bearing wobble?

Before the axle is inserted and the axle nut torqued? I put in a new rear wheel bearing (using a bearing press tool) and the hub wobbles a little. Is this normal or is it a bad new bearing?



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Old 07-31-2018, 03:42 PM   #2
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Wheel bearing has no role in controlling wobble of the hub. Check your suspension bushings.
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Old 07-31-2018, 03:57 PM   #3
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Quote:
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Wheel bearing has no role in controlling wobble of the hub. Check your suspension bushings.
huh?

perhaps bearing didn't press in straight somehow?
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Old 07-31-2018, 04:05 PM   #4
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Wheel bearing has no role in controlling wobble of the hub. Check your suspension bushings.
Bad suspension bushings would cause the entire wheel carrier to move. A wobbling hub is the bearing.
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Old 07-31-2018, 04:52 PM   #5
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^^What he said. ^^

No, the hub should not wobble after installing a new wheel bearing. Something is amiss.
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Old 07-31-2018, 05:28 PM   #6
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My front on one side wobbled until I added the torquing force of the axle nut. Otherwise the two inner races can slightly spread and allow a slight wobble. You might be able to test it using the bearing press to clamp the inner races together and verify the wobble is gone. The 340# of torque really clamps the inner races together. Or it might be in crooked... See if you can find plates and clamp it and spin the hub and see if it resolved. I think this is why the shop manual says not to roll the car if the axle nut is not torqued down. My bearings have been doing well for the last 2 years and 30 or so track days and I was nervous about that wobble at first too.
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Old 08-01-2018, 12:04 PM   #7
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What kind of car is it. The picture shows brake shoes. Boxster's don't have brake shoes?
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Old 08-01-2018, 12:25 PM   #8
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What kind of car is it. The picture shows brake shoes. Boxster's don't have brake shoes?
That's the parking brake.
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Old 08-01-2018, 03:48 PM   #9
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There seems to be some confusion between wheel hub and wheel carrier.

The carrier is part of the suspension and should have no wobble. If it does there is a problem.

The wheel hub is the part that spins around and that the wheel and brake disk bolts to. If the wheel not isn't tightened the bearings that support the hub inside the carrier will not hold it firmly. In that case it will wobble and if you try to drive with it in that state it will quickly destroy the wheel bearings.
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Old 08-01-2018, 06:50 PM   #10
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I have done 10 wheel bearing installs on different press on different cars had 2 that had slight wobble and 8 that did not. All have several thousand miles with no problem. I was worried about it at first as well.
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Old 08-01-2018, 07:38 PM   #11
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Several mechanic folks in the local Porsche group also confirmed that the wobble can be normal.

So my mind is at ease for now putting everything back together. Thanks everybody!

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