Rear Wheel Bearing wobble, New rear wheel bearing has unusual play |
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Rear Wheel Bearing wobble, New rear wheel bearing has unusual play |
MarkV |
Nov 13 2017, 03:57 PM
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#21
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Fear the Jack Stands Group: Members Posts: 1,493 Joined: 15-January 03 From: Sunny Tucson, AZ Member No.: 154 Region Association: None |
I found the old thread:
http://www.914world.com/bbs2/index.php?showtopic=284907 The part # on the loose FAG bearing that I had was 545495AWD. Made in Slovakia. I took it apart after I replaced it and couldn't see what was wrong with it. It seemed like the two halves of the inner race would meet before they were tight to the bearings. |
jim_hoyland |
Nov 13 2017, 04:14 PM
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#22
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Get that VIN ? Group: Members Posts: 9,263 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
Jim its a sealed bearing, i dont think you can re grease it. That was my impression too; but, see: https://www.youtube.com/watch?v=-A5kf5pXl4w |
mepstein |
Nov 13 2017, 05:33 PM
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#23
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914-6 GT in waiting Group: Members Posts: 19,244 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Jim its a sealed bearing, i dont think you can re grease it. That was my impression too; but, see: https://www.youtube.com/watch?v=-A5kf5pXl4w Sealed bearings are usually a press fit bearing that is self contained vs loose bearings that use a cup and cone. Many sealed bearings have an easily removable plastic seal that lets you get to the bearings. Sealed doesn’t always mean non serviceable. |
euro911 |
Nov 13 2017, 08:41 PM
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#24
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,845 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California |
Wow (IMG:style_emoticons/default/yikes.gif)
Good to know that new ones need special attention and are 'serviceable'. The '71 has been rolled around extensively since the axle shafts were pulled out, but I was planning to replace the old bearings anyway. Just didn't know new ones were coming out of the factory with a built-in defect (IMG:style_emoticons/default/mad.gif) Has anybody chided their QC department? |
mepstein |
Nov 14 2017, 07:07 AM
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#25
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914-6 GT in waiting Group: Members Posts: 19,244 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Here's my theory on why the boxster guys have trouble with the bearings while most of us do not. I think the brand new bearings are filled with a bead of grease from a machine instead of having grease worked into the bearing retainer. The boxster spec cars are getting used on the track. So the guys take out there cars and immediately start driving some hot laps. This sudden increase in speed doesn't give the bearing much chance to warm up slowly so the grease can soften and flow to the bearings. So for at least a while, there is hot metal on metal. The bearing gets trashed before it ever has time to get lubricated. Most non track cars would be driven slowly for a while and the grease has time to warm up and flow around the bearing before any one part gets too hot.
The boxster guys are not modifying the bearings, just making sure they are completely lubricated. just a theory... |
paintguru |
Nov 14 2017, 11:41 AM
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#26
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Newbie Group: Members Posts: 13 Joined: 24-October 15 From: Southern Oregon Member No.: 19,295 Region Association: Pacific Northwest |
The double row bearings are very difficult to over-torque. In fact, they rely on a great amount of torque to seat the balls and extend the life of the bearing. Went through 3 of them on a client's racecar till he trusted me that 100 ft lbs wasn't enough (IMG:style_emoticons/default/rolleyes.gif) I'd be willing to bet that once you torque to 217+ ft-lbs, you'll see the slop disappear, I'll do this. The bearing is an FAG unit. |
paintguru |
Nov 14 2017, 11:43 AM
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#27
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Newbie Group: Members Posts: 13 Joined: 24-October 15 From: Southern Oregon Member No.: 19,295 Region Association: Pacific Northwest |
Thanks for all the help. I'll torque on it today and let you know what happens.
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porschetub |
Nov 20 2017, 03:44 PM
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#28
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Advanced Member Group: Members Posts: 4,697 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
Thanks for all the help. I'll torque on it today and let you know what happens. Hi ,did you have a good result after torqueing your bearing?,I would like to know and I'am sure others would (IMG:style_emoticons/default/beer.gif) . |
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