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Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
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Front Wheel Bearing Replacement - How tight should the lock nut be?
I just recently went thru the work of replacing the wheel bearings on my 911 SC. I am curious how tight to tighten up the retaining nut. To much and I bind the bearings and too loose and wobbly problems.
So how do you know when its the right tightness?
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Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
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06-25-2008, 08:39 AM
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Senior Member
Join Date: Feb 2000
Location: Lacey, WA. USA
Posts: 25,310
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About finger-tight. Do not put much force on this nut at all. Tighten just until the play is gone. Conventional wisdom is to tighten it so that a washer between the nut and bearing can be slid back and forth using the tip of a screwdriver. No prying. the washer should be slidable with finger-pressure. With 911's there should be essentially no wheel play. When you are done, the wheel and tire should not have lateral play.
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Man of Carbon Fiber (stronger than steel) Mocha 1978 911SC. "Coco" |
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06-25-2008, 08:51 AM
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Registered
Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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I concur with Superman. However, before getting to this point, I'd suggest overtightening slightly to align the various components, then back off before adjusting to specs.
Sherwood |
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06-25-2008, 09:55 AM
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Registered
Join Date: Oct 2007
Posts: 595
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Quote:
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'84 911, some sort of red color '05 Subaru WRX wagon |
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06-25-2008, 01:40 PM
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Autodidactic user
Join Date: May 2003
Location: Summerfield, NC
Posts: 1,298
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The factory shop manual says 10 ft lbs, Bentley says 11 ft. lbs.
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Please help the MFI community keep the Ultimate MFI resources thread and the Mechanical fuel injection resource index up to date. Send me a PM and I'll add your materials and suggestions.  1973 911E Targa (MFI) |
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06-25-2008, 02:03 PM
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Registered
Join Date: Mar 2008
Location: St.Louis MO
Posts: 447
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Quote:
 That would be an... unfortunate preload. Superman has it although you probably want to rotate the hub while you are tightening the lock-nut and checking that thrust washer. The procedure for setting preload in on 401-12 in the Bently manual if you want to see it for your self.
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1989 Carrera 3.2L in 993 bodywork |
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06-25-2008, 08:56 PM
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Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
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thanks for all the replies guys, ill be reinstalling the assembly onto the struts this weekend.
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Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
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06-26-2008, 05:53 AM
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