Hey forum,



I've got a Discovery 2 TD5 and the coolant level indicator light came on at the weekend. I topped it up with around 1.5 litres of water and after a 30 odd mile trip, it had emptied the expansion tank again.



After starting it the following morning, I noticed a considerable amount of white smoke from the exhaust, however this only lasted for a couple of minutes whilst the engine was cold.



I used an RELD block test head gasket tester to see if my suspicions of a blown head gasket were correct, but the liquid remained blue and passed the test with flying colours.



I'm assuming the coolant is entering the combustion chamber which is why there is white smoke (steam?) on start-up, but why would it then pass a head gasket block test?



Could it be cracked head? Fuel cooler?...



Any advice is greatly appreciated.



​Thanks,

GTR.