How to Seal the Air Filter on a Citroën SM
Jul 21st, 2008 by Denis
On many Citroën SM’s, the front cover of the air filter assembly can be found distorted sufficiently to permit a partial volume of air to enter the carburetors directly, by-passing the air filter cartridge.
It is possible to correct this by using a strip of foam rubber. To do this:
- Obtain a strip of foam rubber, 1/4 x 1/2 x 15 inches approximately.
- Remove the original seal embedded in the front cover.
- Compress the strip of foam rubber into the seat of the original seal.
- Replace the original seal on top of the foam rubber insert.
- Replace the cover. It will require a little extra effort to replace the clamps, but the original seal being hollow, will have the characteristic of taking up the variation of distortion around the perimeter of the cover.
Note: At the 600 mile inspection, or at each periodic maintenance check, it is ABSOLUTELY IMPERATIVE that this be checked and corrected.
This will keep your Citroën SM from leaking dirty and unfiltered air into the air induction system thus preventing premature wear of your three 42 mm. downdraft Weber Carborators and it’s Maserati engine.
Keep your Citroën SM in prestine condition, they don’t make ‘em any more.
