ok, so i have a 2000 discovery land rover & for the past 3 weeks, ive had this huge problem with the car over-heating. so when i took it to get it looked at, i needed coolant b/c my coolant was completly empty! & after it was filled.. about a week later, it started over heating again, so then i was told to get a thermostat .. which i did.. now..(a few days later) its still over heating, but not as fast as it did before. ive been told that i may have a leak & my coolant level looks like its getting low again! what do i do? & what do you think my problem is?? i really need help on this situation because im clueless about this! [>:]