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Thats a tough one to answer without knowing more. However there is a way you can check the water pump very easily. If you look around the pump near the pulley, there will be a small hole. After you find the hole start the car and watch the hole if it leaks water then you need a new pump. Although your problem could be other things including a head problem. Is the coolant leaking outside the car or do you not know where its going? Also, do you have heat for a little while after filling your coolant up or never?
you should always fill your coolant level while vehicle is running. when the thermostat opens level will go down. however, if it "disappears" you have a leak or a serious issue. Look at your oil, if it looks like chocolate milk, you got head gasket issues probably. Also, is there white smoke coming out of exhaust? There is also a weep hole on the water pump. when the pump is going bad, it will leak water from that weep hole.
Your water pump may have failed, or your radiator hose may have a crack or pin hole. The best way to find out is to first fill your radiator, then run the car for about 5 to 10 minutes, then shut the car off and look underneath. First at the water pump. There is a small hole on the bottom of the pump, just behind the pully (this is called the wheep hole) If water is "wheeping" from this hole then your water pump is bad, if not do a visual check on your bottom and top radiator hoses to see if there is a problem with either of them. You may also want to inspect your radiator itself for leaks as well. You could have a cracked radiator.
SOUND LIKE BAD WATER PUMP.IF BATTERY LOW CHARGE LIGHT ON WATER PUMP BEARING COULD BE LOCKING UP DRAGGING DRIVE BELT DOWN ENOUGH TO SLOW DOWN ALTERNATOR TO KEEP BATTERY FROM CHARGING.REPLACE WATER PUMP AND THERMOSTAT.CHECK COOLANT LEVEL SEE IF ANTIFREEZE IN RADIATOR IS LOW. IF SO FILL COOLANT SYSTEM BACK TO NORMAL LEVEL SEE IF WATER PUMP WEEP HOLE LEAKING WHILE ENGINE RUNNING IF SO WATER PUMP IS BAD.
If this is a water leak check water pump diaphram (the hole in the bottom of pump) if you see water around this area replace water pump.Also check water pump gaskets for leak.Or have it pressure tested.
the hole is there to let you know that the water pump is defective, you need a new water pump, normal this hole is filled with wax, when the pump over heats due to the bearings wearing out the wax melts,
You are low on coolant. Find the leak, the red is most likely the coolant. Coolant comes in 2 colors red and green. Your leak is probably either a hole in a hose or a faulty water pump. The water pump has a small hole, usually on the bottom, when the seal goes bad, it will leak there. The only fix is a new water pump.
If it is a hose, just replace it. Make sure when you fill it that you fill the radiator and the overflow, just filling the overflow could cause it to over heat. Also, depending on your climate, you need to mix your anti-freeze with 30-50% water. If you live in a very cold climate, you want to go with 30%water-70%anti-freeze. Make sure that you use the right anti-freeze. red with red, green with green. Some green ones are now compatible with the red, if you change the color, make sure it is compatible.