you probably just did not notice but there was always a little water dripping from the pipe condonsation.
its 2009 you punk, why dont you buy something newer...you better of replacing yourself.
Water is a by product of the combustion and is normal.
Assuming you have not noticed and leaks or puddles near the car the next thing would be to watch for steam coming out of your tailpipe. If there is you probly have a bad head gasket.
If your heater core wasn't leaking at the time your radiator was replaced , then ( no ) That would be two separate jobs
One or all of these conditions could exist, white smoke from tailpipe and/or water drops coming from tailpipe, oily film on top of water at filler in radiator, milky look to oil on dipstick. The car may also run poorly depending on the severity of the leak.
I would check and make sure that isn't just water. Condensation occurs on the inside of the tailpipe as the vehicle warms up... If you had gasoline coming into your tailpipe you would experience backfiring, extreme backfiring.
radiator cap
No. A bad head gasket would cause water to come out the tailpipe. You will see white smoke. Leaky rings would cause oil to come out the tailpipe. You will see blue smoke.
Yes. It also depending on what kind of stop leak and how much is used.
Perhaps plugged radiator - have it boiled out or replaced
It is worn and needs to be replaced. It is collapsing when the water pump draws coolant.
If you have an old ISUZU Trooper, the radiator thermostat may be not working. Therefore, it will not let cool water from the radiator into the hot engine, even if the radiator is full. Have the thermostat checked and replaced, if necessary. Good Luck