Just to update Dor1s.... Thanks very much for your help, my Discovery is now at Land Rover who will be looking at it today/tomorrow. They have confirmed that if the problem is what they think it is (i.e as you stated) they will replace the engine FOC. Muchly appreciated and I owe you a beer!! :D

Thanks to both for your replies, you have given me a few avenues to explore. Fingers crossed!!!

Hi all I am new to this site and requiring abit of advice..... I have a Discovery TD5, 1999 T reg, automatic. At the end of November the car was loosing water but we could not find any traces of a leak at all, 2 of my mechanics (I work at a haulage yard btw) looked and couldn't find any trace of...