A radiator thermostat is a heat sensitive device which monitors the flow of coolant from the radiator to the engine. The valve opens and sends the coolant once the engine has warmed to the required temperature. It plays a key role in the overall function of your car and is vital that you keep your car’s radiator thermostat in good working condition. Replacing a radiator thermostat by yourself is quite fairly simple task.
DRAIN THE COOLING SYSTEM
Remember that you should only start working on your car once the engine has cooled. A few hours after use is actually the safest approach. Put on your work gloves before commencing. After taking out the radiator cap, drain the radiator of coolant until the fluid falls below the thermostat. This can be carried out by use of a wrench to open the drain valve which you can find at the bottom of the radiator. Drained fluid can be run into an old container and disposed of properly.
EXPOSE THE THERMOSTAT
Trail the radiator’s upper hose from the radiator to the engine. This hose links to the engine via the thermostat housing.
Using a Flathead screwdriver, loosen the screw on the hose, take it out from the thermostat housing and put aside. You should notice coolant leaks when you do this so have an old towel or rag handy.
TAKE OUT THE THERMOSTAT
Use your wrench to take ourt the bolts on either side of the thermostat housing. This area may be hard to get to due to the location of the thermostat in your car. You may require a wrench extension which usually come in lengths of 3, 6, or 12 inches. Once loosened, remove the thermostat housing from the engine to show the thermostat. Take note of the position of the faulty thermostat within the engine before lifting it, along with the gasket, out of the engine.
With the aid of your gasket scraper, clean the thermostat housing and the area where the housing meets the engine. Scrape the surfaces so that they are free of any remnants of the old gasket, along with any other unwanted fragments.
PUTTING THE NEW THERMOSTAT
Keep the new thermostat in the engine. Make sure that you position it in the exact same place that the old one was otherwise it may not work. Coat both ends of the new thermostat gasket with gasket sealer. Place one side of the gasket against the thermostat housing and push the gasket right into position. Now, keep the housing over the thermostat. Bolt the thermostat housing down to the engine and tighten with your wrench.
REPLACE THE UPPER HOSE
Be sure to re-attach the upper radiator hose to the thermostat housing and using your screwdriver, screw the hose back onto the housing.
REFILL THE RADIATOR
Use your wrench to close the valve on the radiator before filling it with new coolant. Replace the radiator cap and turn the engine on. Then, switch off the engine and check the fluid level.