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Here is another one , ofcourse thei is a wrong and a right way of fitting the tap that is why they generally mould a very large arrow on it . Yours is oviously fitted the wrong way round , easily fixed take it to one of those clever Mechanics and they will do it and charge like a wounded Bull , or else you could do it yourself by undoing both hoses take the tap out turn it a half of a full turn and refit it making sure you tighten the hose clamps whe they are in place and whatever you do , refil the Radiator and refil it again when the Engine is at operating temperature ( Very very carefully )