How to Replace a Thermostat on a Car
If your car is running hot, whether it is over-heating or just running at a higher temperature, then it might be time to replace your thermostat. Thermostat replacement is easy and takes about one hour.Not all thermostats are located in the same place, so check with your local parts store for the exact location in your car.
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Things You'll Need
- Wrenches and sockets
- Torque wrench
- Thermostat and gasket
- Gasket scrapper
- Antifreeze
- Screwdriver
Instructions
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1
Follow the upper radiator hose to where it meets the thermostat housing. The thermostat housing is where the opposite end of the upper radiator hose mounts to the engine.
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2
Drain enough coolant from radiator until it is below the thermostat. Failure to do this will result in your antifreeze leaking out onto the ground.
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3
Loosen clamp and remove radiator hose from thermostat housing. Some antifreeze will leak out, so have some rags available.
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4
Remove the bolts holding the thermostat housing on and pull the housing from the engine. The gasket might make it a little difficult, so do not be afraid to pull hard. Do not strike it with any tools as you can crack it.
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5
Remove the old thermostat and note its alignment.
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6
Place a rag in the thermostat’s mounting hole so no gasket material can enter the engine and then scrape the gasket from the housing and the engine.
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7
Install the new thermostat in same position as old one.
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8
Reinstall the housing and tighten down bolts snugly. Torque them with your torque wrench to the manufacturer's specification. Make sure you do not over tighten them.
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9
Reinstall the radiator hose to thermostat housing and tighten the clamp.
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10
Refill the radiator with coolant and start the engine, allowing it to reach normal operating temperature.
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11
Check for any leaks at hose connection and thermostat housing. You can tighten them as necessary to stop any leaks.
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12
Stop the engine and allow it to cool down completely then check the coolant level. Add coolant as required.
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1
Tips & Warnings
Always be careful when working around a hot engine.
Never open the radiator or any related components while the engine is hot.
Never allow anyone or anything to drink antifreeze. It is poisonous.
Never pour antifreeze down a drain. It is against EPA regulations.
