Missing screw in Hub - LotusTalk

bli8 · 07-17-2007, 11:31 PM

After adjusting my anti-sway bar, when I tried to re-mount my left front tire I noticed the inside hub with the threaded holes for the wheel bolts was turning inside the hub carrier and upon closer inspection, the screw that held the inside hub was missing! I still don't know how it got missing but other than holding the threaded inside hub in place, does this screw serve any other purpose? The first picture is the left hub and you can see the screw is missing from the fifth (smaller) hole in the hub and the second picture is on the right front w/ the screw intact.

Audiophile · 07-18-2007, 03:51 AM

Not required, but sure do make life easier.

EdHahn · 07-18-2007, 04:59 AM

The only purpose is to keep the rotor in place (edit: when the wheel is off the car). FWIW, if you replace it, you might consider finding a regular flat-head screw rather than the allen screw used.

johnmack · 07-18-2007, 05:14 AM

Have you had new disc fitted?

The retaining screw is quite often drilled out to remove it when changing discs.

It serves no purpose other than holding the disc in place when the wheel is removed, and is not required.

xtn · 07-18-2007, 06:09 AM

Your "inside hub" is the hub.

Your "hub" is the disk brake rotor hat.

Your missing screw is just to retain the hat onto the hub. It is not structurally necessary, but does make life easier.

mike325ci · 07-18-2007, 06:51 AM

hmm, you know i was thinking-- would that have anything to do with 80mph wheel shimmy?? probably not, but since trying to troubleshoot the 80mph shimmy is like playing sherlock holmes, every little thing makes you wonder...

xtn · 07-18-2007, 06:58 AM

Well, it may throw off the balance of the whole assembely slightly, but probably not enough to notice as it's very close to the center of rotation. I finally fixed my shimmy with new wheels and tires. I went through multiple balance jobs and alignments and I believe the root cause was just the Yokohama tires being out of round.

xtn

Jack · 07-18-2007, 08:22 AM

Quote:

Originally Posted by EdHahn

FWIW, if you replace it, you might consider finding a regular flat-head screw rather than the allen screw used.

+1.... I found some at Home Depot --machine screw, flat-phillips, 6mm x 16mm, steel/zinc plated.

MyElise · 07-18-2007, 08:55 AM

Use lots of anti-seize!
Had to drill out all four to replace rotors this winter. All had been coated with anti-seize.

07-17-2007, 11:31 PM	#1 (permalink)
bli8 Registered User Join Date: Jan 2006 Posts: 154	Missing screw in Hub After adjusting my anti-sway bar, when I tried to re-mount my left front tire I noticed the inside hub with the threaded holes for the wheel bolts was turning inside the hub carrier and upon closer inspection, the screw that held the inside hub was missing! I still don't know how it got missing but other than holding the threaded inside hub in place, does this screw serve any other purpose? The first picture is the left hub and you can see the screw is missing from the fifth (smaller) hole in the hub and the second picture is on the right front w/ the screw intact. Attached Images

07-18-2007, 03:51 AM	#2 (permalink)
Audiophile Just say no Join Date: Nov 2004 Location: Outside Albany, NY Posts: 312	Not required, but sure do make life easier. __________________ 08 S2000 - daily driver

07-18-2007, 04:59 AM	#3 (permalink)
EdHahn Jugga Jigga Wugga Join Date: Mar 2004 Location: Northern Virginia Posts: 1,236	The only purpose is to keep the rotor in place (edit: when the wheel is off the car). FWIW, if you replace it, you might consider finding a regular flat-head screw rather than the allen screw used. __________________ Magnetic Blue/LSS Delivered: 1/13/05 Last edited by EdHahn : 07-18-2007 at 06:52 AM.

07-18-2007, 06:09 AM	#5 (permalink)
xtn McLareghini Bugatterrari Join Date: May 2006 Location: Texas Posts: 5,858	Your "inside hub" is the hub. Your "hub" is the disk brake rotor hat. Your missing screw is just to retain the hat onto the hub. It is not structurally necessary, but does make life easier. __________________ 2006 McLareghini Bugatterrari, Storm Titanium... <mods> installed: air horn, Scroth 4-point ASM harnesses, Sector111 halon extinguisher and mounting bracket, Von Hep exhaust and rear panel delete, Pagid brake pads, red Volks CE28n wheels, Toyo RA-1 tires, Nitron SA coilovers, Sector111 (WorksBell) quick-disconnect steering wheel kit. awaiting installation: Scroth "pull-up" lap belts, Sector111 RTD Brace, Tony's heater bypass mod, and dropped steering rack mounting plates. </mods>

07-18-2007, 06:51 AM	#6 (permalink)
mike325ci \|>_/\_ 0##0 _/\_<\| Join Date: Jan 2007 Location: NYC/LI, NY Posts: 518 Images: 3	hmm, you know i was thinking-- would that have anything to do with 80mph wheel shimmy?? probably not, but since trying to troubleshoot the 80mph shimmy is like playing sherlock holmes, every little thing makes you wonder... __________________ Mike \| Manhattan/LI, NY, USA '01 325Ci ("daily" autox track), '86 MR2 (autox track) for sale, '92 Celica GT-Four (restoration show autox rallyx), '07 Exige S (autox track) Laser Blue / Magnolia, Track, Touring, LSD/TC, SS. HRM: HID, 6pt.Schroth. Voltphreaks 3.5lb Battery, DRL Disable "What's my quarter-mile time? I dunno, I turn before I even get that far..."

07-18-2007, 05:14 AM	#4 (permalink)
johnmack Registered User Join Date: Apr 2007 Location: Near Edinburgh, Scotland Posts: 54	Have you had new disc fitted? The retaining screw is quite often drilled out to remove it when changing discs. It serves no purpose other than holding the disc in place when the wheel is removed, and is not required.

07-18-2007, 06:58 AM	#7 (permalink)
xtn McLareghini Bugatterrari Join Date: May 2006 Location: Texas Posts: 5,858	Well, it may throw off the balance of the whole assembely slightly, but probably not enough to notice as it's very close to the center of rotation. I finally fixed my shimmy with new wheels and tires. I went through multiple balance jobs and alignments and I believe the root cause was just the Yokohama tires being out of round. xtn __________________ 2006 McLareghini Bugatterrari, Storm Titanium... <mods> installed: air horn, Scroth 4-point ASM harnesses, Sector111 halon extinguisher and mounting bracket, Von Hep exhaust and rear panel delete, Pagid brake pads, red Volks CE28n wheels, Toyo RA-1 tires, Nitron SA coilovers, Sector111 (WorksBell) quick-disconnect steering wheel kit. awaiting installation: Scroth "pull-up" lap belts, Sector111 RTD Brace, Tony's heater bypass mod, and dropped steering rack mounting plates. </mods>

07-18-2007, 08:55 AM	#9 (permalink)
MyElise Registered User Join Date: Feb 2004 Posts: 2,225 Images: 28	Use lots of anti-seize! Had to drill out all four to replace rotors this winter. All had been coated with anti-seize. __________________ "It's hard to drive at your limit, but it's harder to know where it is." Stirling Moss We're all here because we're not all there.

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