Lucas 45D Distributor O-Ring

[jac04]

Just in case anyone else has run into this issue:
The Lucas 45D distributor is sealed with an o-ring where it enters the engine. I contacted our hosts, who couldn't find a listing on the o-ring and told me that the cork seal would work (which it doesn't). A standard 2-021 o-ring seems to fit, but the cross-section is .070" and doesn't provide enough compression to seal properly. I ended up purchasing a pack of 50 Buna-N o-rings in the correct metric size (M2 x 23.5, .079" cross-section) to fit the 45D distributor.

If anyone needs an o-ring and would like to make a small donation, pm me. I have a few to spare.

[83lee]

I had the same trouble with my Lucas 25D distributor.

RN sold me the cork gasket, but it does not fit. Looks like an O-ring should go into the groove at the top of the distributor shaft housing (where it plugs into the triangular piece).

Anybody know the real story on this?

[jac04]

There is definitely supposed to be an o-ring in that groove. The 25D and 45D should use the same o-ring.
Check out:

http://www.somerford-mini.co.uk/pdfs/Catalogues/Electrical-Inst/06-Distributors-Carburetter-Models.pdf

[SafeAirOne]

If anyone needs an o-ring and would like to make a small donation, pm me. I have a few to spare.

I wonder if Bostonian1976 (Jason) would be interested, since oil squirts out of his distributor shaft hole and gets all over his engine bay? Perhaps this (non-listed) missing o-ring was his problem all along...

[83lee]

Sure enough, your diagram shows the o-ring.

The round cork ring (RN part #52278) does seem to drop into the hole in the triangle housing. I wonder if both the rubber and the cork together are how it was designed to be?

[jac04]

^ No, because the distributor that uses the cork seal has a recess for the cork seal to sit in. The 45D doesn't have this recess, so the dist will sit too high if the cork seal is installed.

[alaskantinbender]

Just in case anyone else has run into this issue:
The Lucas 45D distributor is sealed with an o-ring where it enters the engine. I contacted our hosts, who couldn't find a listing on the o-ring and told me that the cork seal would work (which it doesn't). A standard 2-021 o-ring seems to fit, but the cross-section is .070" and doesn't provide enough compression to seal properly. I ended up purchasing a pack of 50 Buna-N o-rings in the correct metric size (M2 x 23.5, .079" cross-section) to fit the 45D distributor.

If anyone needs an o-ring and would like to make a small donation, pm me. I have a few to spare.

Reviving an old post. Does anyone have a part number or listing for the proper O ring? I cant seem to find it with the info already posted.

Thankyou

[roverp480]

Try 513682A https://usa.minisport.com/513682a-di...er-o-ring.html

[alaskantinbender]

Thank you. Now I need to find it locally in the USA so I don't need to sell a kidney for shipping.