S-10 Thermostat Replacement

Category: Auto Tuning

4.3 vortec

  This vehicle is overheating. The temperature would climb slowly so the first logical thing to replace is the thermostat. A thermostat is not very expensive and is much easier to change than a water pump. They can be tested by boiling water and seeing if it opens. Due to the low effort and price its normally easier to just replace it. This vehicle is a GMC sonoma/ chevy s 10 with a 4.3 liter v6. Changing a thermostat is almost the same on any vehicle though, so dont be too concerned about what vehicle it is.

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Thermostat Replacement, Car Overheating

Category: Auto Tuning

 Thermostat replacement is generally done if a car is overheating. The other possibility is that the car is no longer heating up correctly due to the thermostat sticking. Before changing the thermostat verify that the engine coolant is full and that the cooling fan is working when the car is up to temperature. You will also need to find out the recommended temperature of your car’s thermostat when you purchase it. This sunbird has a 3.1 liter v6 engine that will randomly overheat. Another possibility is that the water pump is bad. Removing the radiator cap (if possible) when it is cool, can some times be helpful to see if flow is occurring although it won’t always work.

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Cooling Fan troubleshooting

Category: Auto Tuning

Cooling fans are easy to troubleshoot. Some automobiles use two smaller fans or one larger fan. The twin electric fan set up will use one fan for cooling the engine. The other fan will be used for cooling the air conditioning and radiator but only works with the ac on. Never continue to run the vehicle up in the red temp zone or you can cause severe damage to the engine. First do you have a temperature gauge in the dash? Is it working correctly? Lift the hood and verify visually that the fan is not working. Does the car cool down once you drive up the highway at 40+ mph? If not, you may have a thermostat sticking or low coolant. The thermostat can cause the engine to stay hot. This can also be the problem if the gauge stays low and the car never heats up. If the temp gauge is reading low yet the two radiator hoses are warm, the temp sensor may not be working. There may also be two temp sensors or senders, one that controls the gauge and one to switch the fan on. If the temperature is getting high and the fan still won’t come on you may have a fan problem.

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