Ok so the z4 is driving me mad. I've replaced the expansion tank, thermostat and the temp coolant sensor now.
It only seems to drip coolant when I open the cap on the expansion tank to check the level. Seems to drip just below the expansion tank area. The dripping stops after an hour and there is no leaking under a compression test (1bar) or when the engine is hot and running.
Any ideas as I'm ready to drive it off a cliff.
It only seems to drip coolant when I open the cap on the expansion tank to check the level. Seems to drip just below the expansion tank area. The dripping stops after an hour and there is no leaking under a compression test (1bar) or when the engine is hot and running.
Any ideas as I'm ready to drive it off a cliff.