Clue's in the title, really - where's the thermostat on my 1994 vintage Seat Ibiza 1.9 diesel (1Y series engine, as also fitted to the VW Golf/Polo/Vento of similar vintage)?
The Haynes manual says it's in an pipe elbow somewhere below the coolant pump (which seems to give me a choice of several possible locations), and shows a picture from a 2.0 litre petrol engine which looks nothing like the area around the coolant pump on my diesel model.
Help much appreciated.