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BN1 overdrive

Moss Motors
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Triggerfish Avatar
Triggerfish Andrew Dineen
Earth, North Wales, UK   GBR
Hi,

I have got an oil leak on the BN1 Gearbox, from the solenoid cover plate. I notice there is no gasket fitted so I'll put a smear of Hylomar on it and reassemble.

I did wonder, however, should oil actually be present in the solenoid housing, and if so how come it was never fitted with the gasket in the first place?

thanks



Edited 1 time(s). Last edit at 2019-02-06 12:43 PM by Triggerfish.

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filospinato Avatar
filospinato Jake Voelckers
Manassas, VA, USA   USA
Nope, should be pretty dry in there. There's an O ring on the lever shaft that acts as an oil seal. If it's never been changed, it might have gotten hard stopped sealing.
I can post a picture later this evening if it helps.

BTW, my BN1 is only 10 numbers after yours.
Jake

Triggerfish Avatar
Triggerfish Andrew Dineen
Earth, North Wales, UK   GBR
Our cars must have been on the assembly at the same time!

I thought it probably should be dry. Any photos would be very helpful thank you smileys with beer

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filospinato Avatar
filospinato Jake Voelckers
Manassas, VA, USA   USA
See attached pictures from the AH parts list. Looks like it was a U shaped seal that was replaced by an o ring.
Hope this helps.
Thanks,
Jake


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Triggerfish Avatar
Triggerfish Andrew Dineen
Earth, North Wales, UK   GBR
Most helpful, thanks!

filospinato Avatar
filospinato Jake Voelckers
Manassas, VA, USA   USA
Sure thing.
Also, of note in those pictures, it doesn't show a gasket between the cover and the plate. I am going to make one from some gasket paper or cork just to keep things clean.

Triggerfish Avatar
Triggerfish Andrew Dineen
Earth, North Wales, UK   GBR
And here it is!
Being the U seal, it must be pretty old I guess.


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Chris D Chris Delaney
Midland Park, NJ, USA   USA
Just a thought, but if you put a gasket between the body and cover how will you tell if a leak develops in the future.

Chris

San Jose, CA, USA   USA
According to the Moss catalog "BN1 used no gasket on this [the cover plate]"

Triggerfish Avatar
Triggerfish Andrew Dineen
Earth, North Wales, UK   GBR
In reply to # 209054 by Chris D Just a thought, but if you put a gasket between the body and cover how will you tell if a leak develops in the future.

Was thinking exactly the same.

PAN Avatar
PAN Alwyn Keepence
Ipswich, Queensland, Australia   AUS
G’day Andrew,
I replaced the lip seal several years ago and never felt the need to use a gasket under the cover. The later overdrives have the solenoid plunger and lever exposed. I had my overdrive repaired more recently so the repairer may have fitted o-rings to replace the lip seals. (As Jake’s diagram shows, there is a seal on both ends of the actuating shaft).
Cheers,
Alwyn

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