You need to check For cooling fan operation. It may be a temp sensor problem (Fan relay signal) or a bad relay. A SIMPLE TEST would be to turn on the A/C, the cooling fan should run continuous in this position. The fan should run intermittently Relative to Coolant Temp. in all other positions. Check for voltage (14v ) at fan motor harness connector . If voltage is present at the fan motor connector then most likely a bad fan motor. The temp switch ( Fan Relay signal) is located in the thermostat housing or the radiator. This engine is prone to head gasket failure so do not overheat during testing procedures.
SOURCE: 1966 Ford Mustang overheating
try to run the water pump without hoses, and add water in the 'in' side, if is powers out the other side, then it's fine. how is your water/coolant mix?
SOURCE: code p0455 evap emission (large)
have the gas cap tested or just replace it, then disconnect the battery for 5 minutes to reset the code, then drive it for a few miles and see if problem comes back, if it does a trip to the dealer is in order, as this may be covered by your emission warranty which is good for 70,000 miles.
SOURCE: 1994 Honda Civic LX\overheating within 2 mile drive
Remove and raise upper hose at thermostat end and remove lower rad hose.
Fill rad with a hose and watch for flow from bottom rad hose and/ or bottom rad hose connecton.......water should fall though rad easily.
Honda rads are cheap.....any restriction....replace rad.
Remove thermostat....fill thermostat housing with hose and watch for water flow at bottom rad hose.
Flush good.
Remove heater hoses.......flush back and forth until a good flow is present "With heater control set to hot" if no or poor flow....replace heater core.
Stop leak can plug everything.
Also.......not likely causing over heating....but ....at your mileage,if you do not know if the timing belt has been changed.....CHANGE IT NOW!
Water pump is optional at this mileage.
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SOURCE: 2002 Dodge Dakota 6 cyl.replaced plugs ditribitor
Check vacuum lines going to evap canister for cracks or splits, causes to much raw air intake.
SOURCE: car over heating
Make sure the pump's belt is correctly installed. If it is double check thermo stat make sure its the correct one and properly installed. If thses items are A-ok then you have nothing to loose by having a repair shopdo a transfusion with a mfluid exchanger. You may have a blockage .If it is air lock other than getting a pressure tester that the dealers use to remove air lock the cheap way outis to run the car for an hour without the cap on It can't over heat cause there is no pressure and you'll see the steam vent out.
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