Guys please shed some light on the instruction on my Civic bonet. "Never dilute the coolent otherwise the life of the car's engine would be seriously shortened" ? Are we supposed to fill whole of our radiator + reservoir only with the coolent?
Secondly, I have read somewhere and have also experienced personally that in cold, coolent in the radiotor contracts so the level in the resorvior drops, but as the car engine gets warmer; the level comes to the normal level and if there is some excess water/coolent, it is drained through the resorvior cap holes. So, is it normal ?