That is exactly what happened to my old back box. I am gonna have to do some long runs on the new box just to keep it in good health. Good excuse for a trip to the seaside for some ice cream, candy floss and chips.Light Sabre said:Nothing to do with the cat as such. Petrol is a Hydrocarbon. One of the results of combustion is that petrol is converted into carbon dioxide, Carbon Monoxide and H2O (water). As it is hot, the water leaves the exhaust as a gas where on meeting the cold air, it shows up as steam. Sometimes on a cold day, you may even see a trickle of water out of the exhaust as the steam condenses on the inside of the cold exhaust. This is why cars which only ever do little journeys tend to have their exhasts fail quicker than those used for longer journeys. The exhaust never gets a chance to heat up properly and drive off the water/vapour that has collected, so this water combines with the other chemicals and becomes acidic which eats your exhaust from the inside out.
One of the reasons your exhaust is only covered for a year from new and not 3 years.
i have this problem with my old mk3 fiesta, i guess its buggered then!!! or maybe its just down to not running it very often at all?Jazzy ZR said:Yeah it's steam produced from condensation sitting in ya zorst! notinging to worry about, unless its black/dark grey!