Hi, has a very high cooling water loss recently. The cooling water tank is almost empty after 60 kilometers, of which 30 km highway, almost empty. From the exhaust in the cold state a lot of water sprays – after 5 minutes already a tiny puddle. Under the car no water seems to leak. The water temperature indicator does not seem to work – it is always to a minimum, even after longer driving. Have the suspicion that it could be the cylinder head seal. In the water tank no oil film floats. At the engine oil filler stop I find no water deposits. Am I correct with my suspicion? Audi 100, C4, Built 1991, Mileage: 105000 Best Thanks Holgus