[Healeys] Overdrive Question

[i erbs]

They only stop leaking when they are out of oil. So most likely related to
the failure.

Ira Erbs
1959 100-6
MKI engine and disc brakes
Portland,OR

On Nov 6, 2016 9:38 PM, "Jean Caron" <
vintage_roadster_restoration at hotmail.com> wrote:

> I have used sealant as well, just rebuilt an overdrive last week and used
> sealant, will it make a difference, not so sure about that, but I have long
> accepted the fact that Austin-Healey leak oil and I don't worry about it.
> Several years ago, a Club member proudly told me that his Healey no longer
> had any oil leaks and within a week the engine blew, was it related, not
> sure but what a coincidence.
>
>
> Jean
>
>
> ------------------------------
> *From:* Healeys <healeys-bounces at autox.team.net> on behalf of David
> Porter <frogeye at porterscustom.com>
> *Sent:* November 7, 2016 12:45 AM
> *To:* Michael Salter; Austin Healeys List
> *Cc:* Healey List
> *Subject:* Re: [Healeys] Overdrive Question
>
>
> I concur, but have on occasion used sealant. It's a PITA to get on both
> sides properly during assembly.. There can be some dissimilar metal
> corrosion after all this time passage.
>
> DaveP
>
>
>
> On 11/6/2016 2:22 PM, Michael Salter wrote:
>
> Hi Andy,
> The thing is that there is no mention of the use of any type of sealant on
> the clutch ring in any of the literature that I have on the overdrive
> units...
> Hard to imagine but I have never seen evidence of any on the virgin units
> that I have disassembled... I think it was just a dry joint!!!
> Michael S
> BN1 #174
>
> On Sun, Nov 6, 2016 at 4:06 PM, Austin Healeys List <
> austinhealeyslist at gmail.com> wrote:
>
>> HI Michael
>>
>> It has nothing to do with the studs stretching and everything to do
>> with the aluminium housing flexing. It only needs to move a tiny bit
>> to unstick the sealant and after that there is no longer anything
>> stopping the oil weeping out. I'll run an FEA simulation on it some
>> time to show just how flexible the ali case is.
>>
>> btw, Yamabond, Kawabond, Hondabond, Suzukibond etc are all OEM names
>> for ThreeBond sealant.
>>
>> Andy.
>>
>>
>> On 11/7/16, Michael Salter <michaelsalter at gmail.com> wrote:
>> > Out of interest I just did the calculations for the change in length of
>> the
>> > studs in this case.
>> > Assuming:
>> > 4 x 5/16" dia studs with an effective diameter of 0.25" each (thread
>> root)
>> > and a length of 3" (in actual fact only the bottom pair are that long).
>> > 0.8 G of braking (which is probably way higher than our tires can
>> generate)
>> > Young's Modulus of 30,000,000 @ 100 degrees F
>> > 700 lbs of engine and gearbox (which is probably very high considering
>> that
>> > the the mounts are all rubber and the main engine mounts would absorb a
>> > fair bit as well)
>> > Works out to about 0.00028" of stretch.
>> > That's less than 10% of a human hair and only during panic braking if
>> the
>> > tie rod is the only thing resisting the load.
>> > I think that there must be other contributing factors...
>> > Michael S
>> > BN1 #174
>> >
>> > On Sun, Nov 6, 2016 at 11:19 AM, Bluehealey <bluehealey at gmail.com>
>> wrote:
>> >
>>
>
>
>
> --
> *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.nethttp://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/
>
> _______________________________________________
> 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/eyera3000 at gmail.com
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20161107/9810862b/attachment.html>