Put a thermostat and gasket on landy 90 (200tdi) ran it for about 15 miles, temp gauge off the chart, looked under bonnet and water is pouring out of header tank at a rate of knots. Diagnosis by my mechanic mate (after testing the thermostat) is that its not opened up leaving the water nowhere to go, leading to hgf. Am gutted, thought by buying an original landy part I would get some quality. Am obviously going to get them to replace the faulty therm but does anyone reckon I could have further comeback on the dealer that sold me the part?? I.e they're liable for my hgf or is that a real long shot??