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.

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

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

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

Most helpful, thanks!

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.

And here it is!
Being the U seal, it must be pretty old I guess.

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

According to the Moss catalog "BN1 used no gasket on this [the cover plate]"

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