I have a 95 sc400 when I start the car up in the morn it sucks all the coolant from the resevor and as the car gets warm it slowly puts it back there is no white smoke and no coolant leaks any idea...

 

sounds normal, but the reservoir shouldnt be full enough for the coolant to be sucked out anyway. That is simply there to catch coolant that is forced out when the radiator cap hits its maximum psi rating due to temperature..

 

Thanks just use to having hondas and they never did this...

 

I don't see how any other cars can define physic. Contraction when cold and expansion when hot.