can incorrectly bleeding air from coolant cause leaks?

[pillzor]

i ask because i just put in a new radiator around a month ago and the coolant level has dropped just a bit since then, im going to go check all of the hoses etc when its light tommorow but im just wondering if it could be anything else such as evaporation (i wouldnt know how this could happen , just throwing it out there)
anything else i should look for besides the hoses connected to the radiator?

[BoNeZ-01]

Expansion and contraction in the overflow bottle is normal.
So if the overflow bottle was topped up a little 'too' full cold after your new rad install, 'some' of it may have overflowed out of the breather hose when the bottle's level increased from the engines hot fluid expansion.
Then, once the engine cooled again, the return cap on the rad would of drawn some back, making it appear that you're 'losing' fluid.
If there is an air lock, this could cause a 'hot spot', which 'could' increase temps, and therefore pressure, forcing more fluid than normal out of the cap and in to the bottle.
Then a similar scenario as before could happen.
But I guess a sustained, higher than normal temp and pressure 'could' cause leaks to develop at weak points, like hose fittings and such.
Check all the fittings you can find, that has anything to do with the cooling system.
Obviously this would include heater hoses, temp sensors, rad hoses and cap, the radiator itself, and water pump.

[Brett_jjj]

Ive changed the coolant in these V6's heaps of times, and I never bother about all this bleeding crap.Just fill it up.Ive never had one problem with doing it this way.You can open the bleeder screw if you want, just to be sure.I dont usually bother.Coolant usually needs topping up every now and then,usually more(maybe once a month)in the summer time.Depending on how hot the weather is.