You have replaced a number of parts, most of the cooling system, some of them twice. The first thing that jumps out at me is the electric cooling fan(s). Either the fan(s) are bad or the sensor that controls them is. Usually those fans always have electric and the sensor acts as a ground when they engage. There should be a fuse to the fans. Have you checked it? Are you certain your fan(s) is working? The next thing is a clogged catalytic converter. After that is timing. I have given you some things to investigate but to really help you with an answer I must ask for a little more information with all the parts you say you have replaced in a 6 month period of time. Is it only the temperature gauge telling you it is over heating or are there other signs of it over heating, if so what are they? Does the car lack power? What kind of mileage is on the car? When you replaced the water pump did you replace the timing belt either time? Have you tried running it with out a thermostat? What is the temperature rating of thermostat? Was the thermostat professionally installed? There should be more than one temperature sensor on the car 1 for the gauge the other to control the electric radiator cooling fan, you mentioned only replacing 1, which one was it?
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You have replaced a number of parts, most of the cooling system, some of them twice. The first thing that jumps out at me is the electric cooling fan(s). Either the fan(s) are bad or the sensor that controls them is. Usually those fans always have electric and the sensor acts as a ground when they engage. There should be a fuse to the fans. Have you checked it? Are you certain your fan(s) is working? The next thing is collapsed hoses if your hoses aren't firm, hard to compress they need replaced. More than likely it is the fan(s) or hoses. If those check out good the next thing to consider would be a clogged catalytic converter. Autozone should be able to test for this for free with their diagnostic scanner. After that is timing, again a diagnostic scan would confirm this _ free at autozone. I have given you some things to investigate but to really help you with an answer I must ask for a little more information with all the parts you say you have replaced in a 6 month period of time. Is it only the temperature gauge telling you it is over heating or are there other signs of it over heating, if so what are they? Does the car lack power? What kind of mileage is on the car? When you replaced the water pump did you replace the timing belt either time? Have you tried running it with out a thermostat? What is the temperature rating of thermostat? Was the thermostat professionally installed? There should be more than one temperature sensor on the car 1 for the gauge the other to control the electric radiator cooling fan, you mentioned only replacing 1, which one was it?
You have replaced a number of parts, most of the cooling system, some of them twice. The first thing that jumps out at me is the electric cooling fan(s). Either the fan(s) are bad or the sensor that controls them is. Usually those fans always have electric and the sensor acts as a ground when they engage. There should be a fuse to the fans. Have you checked it? Are you certain your fan(s) is working? The next thing is a clogged catalytic converter. After that is timing. I have given you some things to investigate but to really help you with an answer I must ask for a little more information with all the parts you say you have replaced in a 6 month period of time. Is it only the temperature gauge telling you it is over heating or are there other signs of it over heating, if so what are they? Does the car lack power? What kind of mileage is on the car? When you replaced the water pump did you replace the timing belt either time? Have you tried running it with out a thermostat? What is the temperature rating of thermostat? Was the thermostat professionally installed? There should be more than one temperature sensor on the car 1 for the gauge the other to control the electric radiator cooling fan, you mentioned only replacing 1, which one was it?