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Message: <blockquote data-quote="c-square" data-source="post: 638528" data-attributes="member: 135"><p>Hope the workshop is able to find the cause of the problem.  Anyway, just to share with you, I had the same encounter with my ex-e36 and have also changed the radiator and hoses. Even done a top overhaul on suspect of a warp engine head gasket. After that a pressure test was done and a thumbs up was given. However the joy was shortlived as I still noticed the dissipitating water problem until one day when I pop opened the bonnet after a hard drive and noticed a slight hissing coming out from a very fine hairline crack on the side of the expansion tank.  The said hairline crack was probably small enough that the pressure test was not able to pick up any pressure loss when the cold.</p></blockquote><p></p>