REPLACED WATER BOTTLE & CAP. AFTER SHORT DRIVE WHEN ENGINE IS SWITCHED OF PRESSURE BUILDS UP & WATER PUSHES OUT THROUGH BREATHER ON WATER BOTTLE. WATER LEVEL DROPS BELOW MIN. WHAT CAN BE THE PROBLEM.

Blown head gasket may cause this to occur as exhaust pressure goes into cooling system and builds up pressure over time

air in the system .put your heating on full .to bleed the heater.remove the expansion bottle cap .run the engine push in the hose from your radiator with your fingers to get the air out your bottle and replace your cap.

My first question is make model and year.
Second, are you saying the engine is boiling over into the overflow tank and onto the ground ? Is the tank about half full when the engine is cold ?
Have you run the engine with the thermostat removed to test ?
Usually when you can hear the coolant moving around, you have air in the system and it is not full of liquid coolant.

could be you have a leak in one of you hose,s

I see two possible causes.
1) Something is blocking air from cooling the radiator. Is there any debris like leaves blocking the radiator?
2) Something is preventing coolant from flowing through the engine. Could be a water pump failure.
Make sure your engine old level is within proper range.

well... your radiator cap should fit properly so start there. If that doesn't work the next step would be to change the radiator valve which should have been done when you changed the radiator... but if they gave you a cap that doesn't fit, why should they do anything else right. You can also change the tempeture valve going into the engine... it may be recording wrong. good luck

Have the cooling system pressure tested with a special tool and see if the source of the leak is the water pump, also feel under the pump for antifreeze.

You've already eliminated the spark plug & wireset, distributor cap & rotor.
Sounds like your car needs a tune-up, specifically, the PCV (positive crankcase ventilation) valve, and/of the EGR (Exhaust Gas Recirculation) valve.

Components checked/replaced during a tune-up are:
air filter
motor oil
motor oil filter
breather filter
fuel filter(s)
fuel strainer
PCV valve
EGR valve
spark plugs
spark plug wires
ECM or distributor cap & rotor
cabin air filter
transmission oil filter
transmission oil
engine coolant
check all vacuum hoses and lines

Troubleshooting the no-start condition - from the 1990 Mitsu Mighty Max Repair Manual:

Priority Action Part Type -- Cause
1 Inspect Battery -- Battery Discharged or Faulty.
2 Inspect Battery Cable -- Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Distributor Cap -- Distributor Cap Cracked or Burned.
3 Inspect Fuel Filter -- Clogged or Dirty Fuel Filter.
5 Inspect Ignition Coil -- Faulty Ignition Coil.
6 Inspect Wireset -- Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug -- Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter -- Starter Motor Faulty.
9 Inspect Fuel Pump -- Low Fuel Pressure.
10 Inspect Solenoid Switch -- Faulty Starter Solenoid Switch.
11 Inspect Fuel Pump Relay -- Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator -- Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch -- Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Drive -- Faulty Starter Drive.
15 Inspect Fuel Injector -- Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer -- Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer -- Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank -- Fuel Tank Empty.
19 Inspect Carburetor -- Carburetor Flooded or Faulty Choke.
20 Inspect Distributor -- Worn, Loose, or Incorrectly Installed Distributor.

your radiator is probably bad small leak but itll do its deal of leak...

You may need to ask AAA to put a radiator pressure tester on the resevoir bottle and pump it up to operating pressure(Pressure cap rating) and see if it over pressurises while it is running at operating temp,rev engine up and down and watch what the testers pressure readings do,it should move up and down in sync with the water pump.If the pressure keeps building i would have to believe that combustion chamber gases are over pressurising your cooling system.Also test the pressure cap is functioning within factory specs.