hey, just noticed my engine is starting to lose water... not a whole bunch but i have to fill the reservoir every now and then. i dont see any leaks or anything. engine runs clean and fine, no smoke or anything. just smogged if it matters. i guess it does it more when im on the freeway. doubt its the head gasket cause when its running and im filling it, when the thermostat is open and everythings up, it seems calm and whirly from the flow. ho humm... it doesnt overheat or anything. what to do what to do?

 

define what you consider every now and then.

for me that would be every couple of months

for some people it's a couple times a week.

 

well, about half a liter every 250-300 miles. i dont really lose in the radiator, as long as the reserve is topped off

 

Stock radiator? does it have a plastic top cover?
If it does check the top and bottom portions in good light.(particularly the top) It could be cracked and leaking small amounts of fluid. You should smell antifreeze, but nothing overbearing.. Nothing really noticeable but enough over a period of time to need to add every now and then. Make note when you stop or park for periods of time... do you see liquid on the ground? does it smell like antifreeze?
Don't confuse the liquids.. If you ran your AC there will be water on the ground when you stop your car.

 

big help, yup its a stock plastic cover. i have a tiny pool that develops under the car, n yeah it coolant, green. doesnt seem to have cracks... would it be possible the rad cap is old? cant hold the pressure??