John,
wipe everything back to dry. Run the car for couple miles and check where the leak is located.
John,
1) if the thread is damaged under the nut, try tied it down by adding extra nut on the top.
2) if the head of the bolt is spinning inside moulded cavity- pump unit would need to be taken out (risk of braeking security ring) and bolt replaced from underneath with next size. dragonMan - is CC pump diferent?
It is tempting just to use a hairdryer on it but with the ammount of fuel involved may be a recipe for firey disaster :O
I don't think petrol will ignite through heat alone but I'd certainly be wary of it...![]()