Hello. I had the problem with my Swift Mz two weeks ago that after about 20 minutes driving the temperature of the engine climb up to just about the red area. I then drove and turned it off. I am there so slowly again and again to the workshop. Today I got the information that it is possibly a hair crack in the cylinder head. Is that really possible? Neither was there any less cooling liquid level on that day, nor could one see coolant traces in the oil cover n. The fan works too. Also no white smoke from the exhaust. That morning the heater also searched for a very long time to get warm. Much longer than normal. That has to be related? But really a hair crack?