Hi im new to this site i have got a range rover 4,ltr p38 i have only had it a few mths it has just started over heating it does not go into the red it only reaches the last white line then as im driving it goes back down. And now i have heat only on the passenger side the drivers side blows cold. My coolant bottle has overflowed about 3 times i just thought i had over filled it could anyone tell me what the problem might be many thanks steve