When that happens It burns less efficiently, you end up heading to the gas station more often than you should. Additionally, your car is designed to warm up quickly and efficiently. This happens every time you turn on your car when it intentionally burns rich, which is to say it uses more fuel, in an effort to get your car up to temperature faster.
An open valve means it cannot do this at all. If this continues your car will stay in the warmup cycle all the time. That means you'll constantly be burning a rich fuel mixture lowering your fuel economy but it also means you're going to have carbon buildup inside your engine and if it gets bad enough you'll have unburned gasoline making its way into the exhaust system. That can end up destroying your catalytic converter. The catalytic converter is an important part of your car's exhaust that prevents pollution from being sent out into the atmosphere.
That's a pretty steep repair bill for a problem that could have been easily prevented. Replacing a thermostat in your car could have a range of potential prices. Like most repair jobs, this one really depends on the make, model, and year of your vehicle.
High-end vehicles tend to have more expensive thermostats in them and the cost of replacing them will set you back quite a bit more. The cost of replacing your thermostat is much more related to labour rather than the actual technology being used. A new thermostat can be surprisingly cost-effective compared to many parts that you might need to buy for your car when they go wrong. You can buy a new thermostat on a site like Autozone.
If you're looking to save some money on labor costs, which as we've seen can be pretty considerable for a job like this, you couldn't take on the task of replacing the thermostat yourself. All things being equal it's not that complicated of a repair job. With the engine cold, remove the radiator cap and start the engine. Replace the radiator cap and turn off the engine.
Check the radiator hoses for differences in temperature. If one usually the top is cooler, but the bottom is burning up, that indicates the thermostat is stuck closed as well. Do not stick your hand near the front of the engine while the fan and belt are moving, and never remove the radiator cap from a hot engine. The final test involves removing the thermostat and doing a temperature test. Heat up a pot of water to the stamped temperature on the thermostat and use a pair of pliers to hold it under.
Thermostat failure can be caused by contaminated fluid or simply an old thermostat with weakened springs. Contamination happens when incompatible coolants are mixed, old coolant is not changed as recommended or particulate matter from gaskets or elsewhere breaks off.
Generally you can steer clear of contamination with proper maintenance, but thermostats themselves can also just wear out over time. Again, this should only be done when the car has cooled off from driving. If you do open it immediately after having your car on, there could be a pressurized burst of coolant.
Have someone else start the car for you. Look carefully, at a distance away from the open radiator cap, to see if fluid is being allocated to the engine. Have the person who started the car also notify you of the engine's temperature. Turn off the engine and feel the two thermostat hoses that connect the fluid tank with the engine. Check the top and bottom hoses. The lower radiator hose should be hotter than the top.
If somehow the top one is hot then there could be blockage issue. Let the car cool more and disconnect the hoses from the engine. See if there are any physical blocks in the hoses and make sure the valves in the hose, which open and close when fluid is needed in the engine, are able to move up and down.
If they cannot move up and down then they are the main problem. Use a screwdriver to loosen the nut on the tube clamp and then pull the hose off of the engine. Set the end of the hose aside for now so you can access the thermostat housing on your engine. Remove the thermostat after disconnecting the thermostat housing from the engine.
The thermostat housing is the blocky metal piece connected to your engine block that the hose was attached to. Pull the housing off of the engine to expose the thermostat, which looks like a small metal cylinder with a spring and 2 metal rings around it. Grab the end of the thermostat and pull it out. The bolts for your thermostat housing may be different lengths. Make note of where each bolt went inside the housing so you can reattach it correctly later.
Fill the pot with water from your faucet and set it on a stove. You can also hang the thermostat on the side of the pot with a piece of string or metal clip.
Turn your stove onto high heat and place a thermometer in the pot of water so you can record the temperature. Turn off the heat once your thermometer reads within the range. Pull the thermostat out of the water with your tongs and set it on paper towels to dry it off. As the thermostat heats up, the spring should compress and the center ring will separate from the outer ring to make a gap in the middle. Make sure the thermostat matches the model vehicle you have. Replace the engine coolant temperature sensor.
Periodically, sensors go out, and that one is common. Not Helpful 19 Helpful In my e46 BMW n42b20 engine, the gauge works normally, but when I drive at a high speed or if the weather is cold, the gauge drops as a result and the heater gets cold. When I drive at a low speed, the heat gauge stays at a normal position.
What might be the problem? Not Helpful 9 Helpful Do I need a thermostat in a ? I had them removed before in other vehicles and not replaced just didn't have heater or defroster - I live in Florida. Steven Spacil. Without a thermostat your engine won't get to the operating temperature the computer is looking for so it will think the engine is cold and enrich the fuel mixture to help warm the engine.
That's because every pound of pressure the cooling system builds increases the boiling temp of water by 3 degrees. A 15 psi system increases the boiling temp by 45 degrees to Not Helpful 6 Helpful It can. But if your thermostat gets stuck at all, replace it. They're very inexpensive. With basic tools, you can easily replace it. Will a stuck thermostat cause the auto to use water by forcing it through an overflow pipe? If your thermostat is closed, there is nowhere for your water to go but out the overflow.
Not Helpful 23 Helpful Is it possible that coolant isn't running through my car's engine if it is running hot and I have already had the thermostat and radiator replaced? Yes--you probably need a new water pump as it is the component that circulates the coolant through your engine.
What can I do if my vehicle has a problem with the heat and accessories? The heat only works on high.
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