My 1999 dodge neon is overheating and just changed water pump and thermostat radiator. No leaks and no water in oil. Changed thermostat again and same problem . How can you tell if water pump is bad and theres no noises.

It maybe as simple as a bad radiator cap ! If not refer to You Tube !

THIS MEANS THERE IS A MIXTURE OF WATER AND OIL SOMEWERE,CHECK THE WATER PUMP GASKET

Hi i am using sch-w193 handset.. I wnt to reset my handset,bt i forgot my password..how to do?

you have head gasket problem , if you need any help let me know .

Did he flush the radiator? If not kindly ask him to flush the radiator and then refill it again.

Overheating is not always caused by a bad water pump or bad engine firing timing.

The most common causes are:

• faulty radiator cap: steam/water will be escaping from the caps when engine is hot or oveflow tank overflows or empty!
  
• crack cylinder head gasket: check when engine is cold thru radiator cap hole for milky oil in water radiator or large bubbles in radiator water after starting engine. Also check if water steam comes out of exhaust.
  
• cylinder head itself: same symtoms as for gasket above.

Hope it helps you find your problems.

remove pump and check that the imèller which is plastic hasnt seperated from drive shaft

How much are you loosing? If its just a little that could be from nothing more than expansion. If you are loosing a lot that could be either from overheating (steam) which would suggest the water isn't circulating and cooling or from a head gasket leak causing air to be injected into the water jacket and displacing the water.

Are you getting any oil in the water? foam? does the water appear to be milky?

If the car runs good, and as long as you're keeping up with your regular oil changes, using the correct fluids (coolant, oil, fuel, etc), all coolant hoses are fresh, no leaks or excessive corrosion/contamination, and you followed all procedures correctly, then I suppose it could be the coolant temp sensor or related wiring/ connections. Normally this would trigger the cel (check engine light)...does it come on periodically when you turn the key on? Unfortunately, there are some dirty dealers out there who will tamper with this light (ex:remove the bulb) b4 selling. Have it scanned anyhow. If the check engine light works at startup/no codes, double check the thermostat. Did you flush the system b4 installing the water pump? Otherwise there may be some kind of blockage (or air) in the coolant passages. Don't get frustrated, and diagnose the ****** one step at a time. Good luck, hope this helps!

are the fans turning on???? if this has ac turn it on high. fan should kick on instantly. good luck .....jimmy