There is an unidentified fluid leakage in the engine bay of my Volvo V50. Towing the caravan home on a hot day I thought there was a smell from under the bonnet. Looking into the engine bay from the front, there is a curved black steel pipe on the LH side near the alternator which drops downwards and connects to a flexi-pipe which disappears under the radiator.
On the pipe was a fine, transparent, oily and viscous fluid, which I thought might be ATF, but I could not see where it had escaped from.
I wiped it off and it was transparent and colourless like water. I left the engine to idle for ten minutes and then switched off for another 10 minutes.
I then drove home at 50 mph for the rest of the journey – I usually tow at 55 to 60 depending on the gradient, so never go mad. It seemed to be OK when I got home, and has not reappeared.