radiator fluid

On the plastic fluid reservoir bottle (it's also called a 'de-gas bottle') there are two level marks, one for "HOT" and one for "COLD." If the engine is off and cold, the fluid level should be at the cold mark. If you've driven it and the engine is hot, then the fluid should be at the hot mark. Don't worry about the fluid level inside the radiator, the cooling system will draw in as much coolant as it needs from the reservoir. It's a good idea to replace a radiator cap once every couple years, if the seals crack or they can't maintain a proper pressure, then the cooling system won't function as designed (it's an enclosed pressurized system).

I am very sorry for your predicaments. I leave about one inch from the neck. If the car is not overheating now why do you want to replace the radiator cap? DO NOT remove the radiator cap when the car has been running, even for a short while, coolant (water) is under high pressure and will burst out, you will get burned. Either take a look at the coolant reservoir when the car is cold or hot, check level of coolant in the reservoir and, if below line for cold or hot, add to that level. Tell the "little shop up the street" that all you want now is a radiator flush and to replace the coolant (antifreeze). If other things are wrong with the car, just ask for a written estimate for parts and labor and shop around, you may find a better price. If you have questions, post again, maybe other Gurus will pick up and respond as well. Hang in there, never loose faith!!

thank you KenF and Jorge :) I feel good about this, thanks for your help :)

You are welcome!

It sounds like thermostat mine did the same thing. As for the coolant reserve tank don't go by that fill the radiator, reserve tanks are a joke