[Healeys] Rear axle gasket question

Wilko2 e-wilkins at cox.net
Mon Jan 26 17:13:23 MST 2015 

A little clarification...

What some are calling an "O-Ring" is not an O-ring at all (even though Moss calls it one) It's a squarish profiled seal between the bearing and the axle area toward the Diff. The paper gasket keeps the bearing grease from oozing out into the brake area. Don't ask me why I know this is important.

The so-called o-ring seals the inboard side, the paper gasket seals the outboard side.

Wilko.

On Jan 26, 2015, at 3:32 PM, David Porter wrote:

> ..the plot thickens...
> 
> On 1/26/2015 4:26 PM, Wilko2 wrote:
>> My BN6 has no O-ring, and the BMC workshop manual doesn't show one. 
>> 
>> 
>> 
>> On Jan 26, 2015, at 3:19 PM, John Rowe wrote:
>> 
>>> I am thinking that would BMC engineering in those days be so sophisticated that they would be worried about .004” to .010”. Judging from what I have seen over the years, I doubt it. IIRC, I used a grey silicone as a sealer- works ok for me.
>>> John Rowe
>>> Qld Australia
>>> BN1 BT7
>>> From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Michael Salter
>>> Sent: Tuesday, 27 January 2015 7:46 AM
>>> To: Steve B. Gerow
>>> Cc: healeys at autox.team.net
>>> Subject: Re: [Healeys] Rear axle gasket question
>>>  
>>> Well you may be over thinking it but you are at least keeping us amused :-)
>>> BTW the BN1, BN2 and 100S didn't have the "O" ring seal so I think in their cases the gasket was the seal..
>>> Pooffff goes that theory..
>>> Michael S
>>> BN1 #174
>>>  
>>>  
>>> On Mon, Jan 26, 2015 at 4:36 PM, Steve B. Gerow <steveg at abrazosdata.com> wrote:
>>> The whole idea of the gasket-as-shim has a certain logic to it - except the o-ring does the actual sealing, correct?
>>> 
>>> Is this the idea: when we tighten the lug nuts, we compress the gasket from, say .014" to .010". At .010, the axle center makes contact with the spacer ring and bearing, coming to a stop. There is then .010" between the carrier and axle flange. The gasket takes up the slack - is the compressed gasket strong enough to in effect be a shim between these two parts?
>>> 
>>> Michael - maybe when extra-tightening of the lug nuts, the axle flange is also bending slightly to take up this gap.
>>> 
>>> Betcha I'm over-thinking this! :-)
>>> 
>>> 
>>> 
>>> --
>>> Steve Gerow
>>> 
>>> 
>>> 
>>> >  -------Original Message-------
>>> >  From: Michael Salter <michaelsalter at gmail.com>
>>> >  To: Steve B. Gerow <steveg at abrazosdata.com>
>>> >  Cc: warthodson at aol.com <warthodson at aol.com>, simon.lachlan at homecall.co.uk, healeys at autox.team.net
>>> >  Subject: Re: [Healeys] Rear axle gasket question
>>> >  Sent: Jan 26 '15 11:28
>>> >
>>> >  One other observation on this subject.
>>> >
>>> >
>>> >  This is, I believe, the only place on a Healey where 'conical" seat nuts
>>> >  are used.
>>> >  It has been my experience that conical seat nuts always require re-torquing
>>> >  after a little  use. Just like the lug nuts on your every day driver if
>>> >  you torque them up, then drive the car for a bit you will find that the
>>> >  nuts will take up to half a turn just to restore them to the original
>>> >  torque.
>>> >
>>> >
>>> >  That said however I do have to agree with Chris regarding aggressive use.
>>> >  On AHX12 we found it necessary to re-torque those nuts after every day of
>>> >  competition and they would always go on an additional flat or so.. I always
>>> >  wondered where that extra tightening room came from because after a week of
>>> >  Targa Newfoundland we would have tightened the nuts at least one full turn
>>> >  ... that's 0.055".
>>> >
>>> >
>>> >  I "forgot" to mention to co-driver Michael O that a likely cause was
>>> >  stretching of the studs..:-).
>>> >
>>> >
>>> >  Michael S
>>> >  [LINK: http://www.acmefluid.com.au/larry/ahx12.html]
>>> >  http://www.acmefluid.com.au/larry/ahx12.html
>>> >
>>> >
>>> >  On Mon, Jan 26, 2015 at 12:25 PM, Steve B. Gerow <[LINK:
>>> >  mailto:steveg at abrazosdata.com] steveg at abrazosdata.com> wrote:
>>> >  Some observations:
>>> >  New Moss gasket - .014"
>>> >  Old gasket originally coated with Hylomar, as removed from axle - .010"
>>> >
>>> >  .004" = copier paper
>>> >
>>> >  My axle is buttoned up with a new gasket and the rear rotor/caliper back
>>> >  in place or I'd try to do a science project here.
>>> >
>>> >  For a gasket thickness, perhaps if one were to bolt the assembly together
>>> >  without gasket and measure the gap with shims, then add .003" to that.
>>> >
>>> >  The new bearing, assembled with heat and cold per Tom Monaco's
>>> >  instructions, is a tight fit in the carrier and axle - IIRC the bearing
>>> >  depends on this more than the compression of the spacer, gasket, etc.
>>> >
>>> >
>>> >  --
>>> >  Steve Gerow
>>> >  Altadena, CA
>>> >  BN6
>>> >
>>> >
>>> >  >  -------Original Message-------
>>> >  >  From: [LINK: mailto:warthodson at aol.com] warthodson at aol.com
>>> >  >  To: [LINK: mailto:simon.lachlan at homecall.co.uk]
>>> >  simon.lachlan at homecall.co.uk, [LINK: mailto:steveg at abrazosdata.com]
>>> >  steveg at abrazosdata.com, [LINK: mailto:healeys at autox.team.net]
>>> >  healeys at autox.team.net
>>> >  >  Subject: Re: [Healeys] Rear axle gasket question
>>> >  >  Sent: Jan 26 '15 08:41
>>> >  >
>>> >  >  I have not tried it but I doubt it. On the three axles I have actual
>>> >  >  experience with the gasket needed to be Approx. 0.004" thick so that
>>> >  the
>>> >  >  spacer met the specified tolerances in the workshop manual. The
>>> >  gaskets I
>>> >  >  purchased were all approx. 0.010" thick. That would be a lot of
>>> >  squish. You
>>> >  >  would have to squish it without the bearing spacer in place. Then
>>> >  remove
>>> >  >  the axle & measure how much the spacer stood proud of the gasket. Then
>>> >  >  reassemble everything, if it met spec. It seemed easier to just make a
>>> >  >  gasket of the proper thickness.
>>> >  >
>>> >  >  Gary Hodson
>>> >  >
>>> >  >
>>> >  >  From: Simon Lachlan <[LINK: mailto:simon.lachlan at homecall.co.uk]
>>> >  simon.lachlan at homecall.co.uk>
>>> >  >  Subject: RE: [Healeys] Rear axle gasket question
>>> >  >
>>> >  >
>>> >  >  If you soaked the too big gaskets in, say, WD40, wouldn’t they
>>> >  compress
>>> >  >  down to a proper size as you tightened up?
>>> >  >
>>> >  >  Just a thought..............
>>> >  >
>>> >  >  Simon
>>> >  _______________________________________________
>>> >  Support Team.Net [LINK: http://www.team.net/donate.html]
>>> >  http://www.team.net/donate.html
>>> >  Suggested annual donation  $12.75
>>> >  Archive: [LINK: http://www.team.net/archive] http://www.team.net/archive
>>> >  Forums: [LINK: http://www.team.net/forums] http://www.team.net/forums
>>> >
>>> >  [LINK: mailto:Healeys at autox.team.net] Healeys at autox.team.net
>>> >  [LINK: http://autox.team.net/mailman/listinfo/healeys]
>>> >  http://autox.team.net/mailman/listinfo/healeys
>>> >
>>> >  Unsubscribe/Manage: [LINK:
>>> >  http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com]
>>> >  http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
>>> >
>>> >
>>> >  --
>>> >
>>> >
>>> >  If you can't fix it with a hammer, you've got an electrical problem.
>>> 
>>> 
>>> 
>>> --
>>> If you can't fix it with a hammer, you've got an electrical problem.
>>> 
>>> _______________________________________________
>>> Support Team.Net http://www.team.net/donate.html
>>> Suggested annual donation  $12.75
>>> Archive: http://www.team.net/archive
>>> Forums: http://www.team.net/forums
>>> 
>>> Healeys at autox.team.net
>>> http://autox.team.net/mailman/listinfo/healeys
>>> 
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/e-wilkins@cox.net
>>> 
>> 
>> 
>> 
>> _______________________________________________
>> Support Team.Net http://www.team.net/donate.html
>> Suggested annual donation  $12.75
>> Archive: http://www.team.net/archive
>> Forums: http://www.team.net/forums
>> 
>> Healeys at autox.team.net
>> http://autox.team.net/mailman/listinfo/healeys
>> 
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/frogeye@porterscustom.com
>> 
> 
> -- 
> Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM 87107 505-352-1378 Go HERE: my world www.porterbikes.com/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20150126/988ef8d4/attachment.html>

More information about the Healeys mailing list