Engine Mechanical problem
2003 Rover 45 4 cyl Front Wheel Drive Manual 49000 miles

Hi,I have a problem with my rover 45 1.8 saloon.I seem to have to make frequent top ups of coolant in the expansion tank,not a great deal but it is using water.The car does run well no loss of power does not overheat,it does seem to rattle a little bit in the mornings then runs smooth after a mile.I have replaced the expansion tank it did have a bit of gunge in and smelt a bit charcoley.I have had a new expansion cap oil change coolant reflush and new theomostat and housing and check all coolant hoses.The car still leaks water but runs and starts fine,I have have a block test done on the car for suspect head gasket failure but it passed,Pleased could anyone help.