How do I know if my water pump needs replacing

i hope this helps for the water pump. The thermostat is located at top of engine simply follow upper hose to engine and remove housing and replace thermostat.

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.

check the blades on the water pump

COULD BE THERMOSTAT IF TOP RADIATOR HOSE IS NOT HOT AND BOTTOM RADIATOR HOSE GOING TO WATER PUMP IS HOT THE THERMOSTAT STICKING PARTIALLY CLOSE.IF TOP HOSE IS HOT THE RADIATOR,ENGINE BLOCK HEATER CORE NEED FLUSHING OUT.IF WATER PUMP WEEP HOLE LEAKING REPLACE WATER PUMP, FAULTY WATER PUMP WILL CAUSE ENGINE TO OVER HEAT.REPLACE RADIATOR CAP MAKE SURE YOU HAVE 50 / 50 MIX SOLUTION ANTIFREEZE AND WATER IN COOLANT SYSTEM. IF ALL LOOKS GOOD CHECK ENGINE OIL ON DIP STICK, IF OIL IN DIP STICK LOOK LIKE MILKSHAKE YOU HAVE BLOWED HEAD GASKET THAT WILL CAUSE ENGINE OVERHEATING WHILE DRIVING CAR IN SHORT DISTANCE AND ENGINE OVERHEATING.

REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.IF CAR OVER HEATING WHILE IN MOTION.MORE LIKELY ITS THE THERMOSTAT,LOW COOLANT IN RADIATOR OR COOLANT SYSTEM,BAD WATER PUMP,WATER PUMP WEEP HOLE IS LEAKING, WATER PUMP NEEDS REPLACING.CHECK ENGINE OIL,IF OIL LOOKS LIKE MILK SHAKE YOU HAVE LEAKING HEAD GASKET.IF CAR IN PARK AND OVER HEATS WHILE IN A LONG TRAFFIC LINE OR.BANK DRIVE THROUGH COOLANT FAN NOT TURNING ON, BECAUSE THE ENGINE COOLANT TEMPERATURE SENSOR FAULTY.CODE SCAN CAR FOR FAULTY COOLANT FAN RELAY OR FAULTY PCM. CHECK COOLANT FAN FUSE, AND HOT WIRE THE COOLANT FAN TO MAKE SURE ITS WORKING.IF COOLANT FAN DONT WORK WHEN HOT WIRED. COOLANT FAN NEEDS REPLACING. REPLACE BOTH RADIATOR HOSES, REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.BUY NEW COOLANT ADD 50/50 WATER AND COOLANT.IF ENGINE OIL HAS ANTIFREEZE IN IT.REPLACE ENGINE OIL AND OIL FILTER TO KEEP FROM LOCKING UP THE ENGINE.GET CAR FIX.DONT KEEP DRIVING IF IT KEEP OVER HEATING,ENGINE DAMAGE WILL OCCUR.I HOPE INFORMATION I GAVE YOU WILL FIX PROBLEM.PROBLEM COULD BE LEAKING RADIATOR HOSES BUT CHANGE THERMOSTAT THATS FIRST THING I WOULD CHANGE BECAUSE IF IT CLOSED, ENGINE WILL OVER HEAT AND CRACK CYLINDER HEAD OR CRACK PISTON, COOLANT NEED TO CIRCULATE THROUGH THE ENGINE TO TAKE AWAY THE HEAT FROM ENGINE.

yes it is

Check for coolant leaks, usually a bad water pump will have a steady drip from the bottom of the pump.
Also check and make sure the radiator cooling fan is working.
If you find no leaks and the fan is turning the problem will probably be the thermostat.
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you need to replace the heater core and pressure text the radiator cap, replace if it leaks down go to a parts store to do this also you need to replace freeze plugs if you don't they will blow and ruin the engine,a slo check that the water pump is not bad, loosen the pump belt and see if you can wiggle the water pump with fan connected, if you have any play replace the water pump. and add new anti freeze.

are you sure its the water pump?Its located and the passenger side mid lower on the belt.One thing them cars were noted for was blown head gaskets.If you don't see any possible leaking and you smell it look at the exhaust pipe while its getting hot and you'll see with smoke come out or a lot of moisture coming out of the exhaust or a lot of dripping.Also if your radiator fans are not working and it heats up more just idling or short drives that will make it over heat and coolant to flow out of the radiator cap or over flow.I hope these things help you in locating the problem.Have a great day...

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

When it does not pump the water at all the engine brakes after few miles.

Check if there is any leak in the water lines, or in the radiator.

If there is no leak, that means that the water is being vapourized inside the engine because of a defective head gasket.
When this happens you often can also get white smoke coming back from the exhaust.

You probably need to replace the head gasket.