I recently rebuilt my fuel pump (no vacuum ports), but the kit did not have the oil seal that is under the diaghram/spring. The original is quite stiff and brittle, I re-used it because I had no choice.
I would prefer replacing it, as I can only see this failing quite quickly. How important is this seal ? Is it feasible to drill a hole (ala M38 pump mod) ?
Does anyone know of a source of just the seal, being I've already replaced everything else ?