[Healeys] Overdrive Question

Sun Nov 6 09:19:27 MST 2016

Team.

I can agree that a good goo between the mating faces is important and the
Japanese Motorcycle manufacturers will probably have the solution nailed.
The root cause however isn't necessarily pressure, flange flatness, or goo
failure.

It is more likely that the rear reaction strut (not sure what else to call
it) causes the joint to flex a little and open every time the car slows
under braking.  My theory and the solution I adopted can be found here:

http://www.bluehealey.com/Struts.html

No leaks from my gearbox.

AlanB

cid:image001.png at 01D18856.FC90FB60

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Roger
Grace
Sent: 05 November 2016 21:02
To: David Porter; Healey List
Subject: Re: [Healeys] Overdrive Question

Sorry to reopen this, but have this same leak in my BJ8 OD and fixing it is
one of my Winter projects.

Given that the black sealant stuff that was used before didn't last (have no
idea how long ago or what it is) and that there is no oil pressure on the
joint, am sensitive to using what is the appropriate goo that will last and
contain the oil.

Have done some checking around and the Hylomar universal blue is used by
some shops that fix OD's.

Overdrive Services (ex Laycock people in UK) tell me that the originals were
sealed with a product called Wellseal.

Nowadays they use a Wurth sealant that mentions flange mating in its website
blurb.

BTW they said that they could supply me with a gasket for this joint that
seems like a good idea ?

The reality is that these are 2 Al flanges that are mated without a gasket.
I wonder why ?. Plan to do some careful flatness checking when have my hands
on them.  Has anyone had a problem with the mating flatness ?  do they have
a tendency to warp over the years and maybe abuse too ? given the shape not
easy to machine flat - why do they leak ?

Comments/ideas please.

rg

From: David Porter 

Sent: Wednesday, October 26, 2016 7:15 AM

To: Bob Spidell ; John Spaur 

Cc: healeys 

Subject: Re: [Healeys] Overdrive Question

seems like any RTV that is oil compliant will work. There is no internal
pressure that will force oil out. The oil level in the OD is just above the
operating shaft level, hence the need for the o-rings on the shaft.

DaveP adding to the wisdom....

On 10/26/2016 7:40 AM, Bob Spidell wrote:

Soooooooo ... both types of Hylomar WILL seal the joint?

  _____  

From: "John Spaur" mailto:jmsdarch at sbcglobal.net
To: "WILLIAM B LAWRENCE" mailto:YNOTINK at msn.com, "healeys"
mailto:healeys at autox.team.net
Sent: Tuesday, October 25, 2016 8:27:53 PM
Subject: Re: [Healeys] Overdrive Question

In my experiences neither of the two types Hylomar will not seal that joint.

John Spaur

San Jose

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of WILLIAM B
LAWRENCE
Sent: Sunday, October 23, 2016 8:26 PM
To: healeys at autox.team.net
Subject: [Healeys] Overdrive Question

.disassembly of the OD because it is seeping oil at the clutch ring. There
are no gaskets, but I would like to smear some Hylomar on the joint faces to
stop the leak. 

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-- 
Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM 87107
505-352-1378 Go HERE: my world www.porterbikes.com/ 

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