I drove away from the house on this dull, wet morning, and was alarmed to see thick white smoke rising through the bonnet vents. Expecting the worst I quickly pulled over, stopped the engine and opened the bonnet expecting to see oil everywhere. I had a look around for potential causes like the coolant system or burnt oil but the ‘smoke’ smelled like steam and I could see the exhaust manifold was quite wet. It turns out that the heat-wrapped exhaust manifold had absorbed and soaked up the rainfall overnight which has dripped through the bonnet vents. When the manifold got hot, the water turned into steam and made the car look like a steam engine! I must admit it did look comedic when driving down the road, with steam pouring out the bonnet vents. A couple of minutes of driving and and the manifold is dry – no need to panic!