iideusii

I checked the coolant level the other day and it seemed to be a bit low. I don't know about Lexus, but for my old car i used to add just water and it would run fine. Today again it started happening and when i got home, the coolant level was down again...any more suggestions?

I have a 92 es300 and just recently had the coolant flushed. I now drive to work (about 15-20 minutes), all local and my temp gauge rises to the 3/4 mark whenever I sit at idle at a light. It gradually goes back to the halfway mark after I start driving again. I do have the A/C blowing but even with it off for the whole drive, it still rises. Im wondering if I need the coolant replaced again or if something else is going out. Need help Please!