Car thermostat stuck closed 2). Jan 4, 2024 · In simple terms: If the thermostat is stuck open, cold air runs through the engine, and heat is dissipated into the radiator, while for the thermostat stuck closed, the car overheats due to rapid temperature increase. The thermostat may get stuck if that fluid becomes too contaminated and deposits form Oct 2, 2022 · A stuck-open thermostat can also cause a lack of heat from the heating system. I’ll give you in-depth information about this troubleshooting process and a step-by-step guide to displacing a bad thermostat in your vehicle. As a mechanic, I see this I show how to check if a thermostat is working properly. If your car’s thermostat gets stuck in a closed position, it can cause the engine to overheat. Learn to recognize the symptoms and importance of timely maintenance to safeguard your Sep 12, 2024 · A quick fix for a thermostat stuck closed is to replace the thermostat. To check if your car’s thermostat is stuck open, check the radiator hose for flow as soon as you start your engine. . The thermostat essentially “forgets” its job and fails to activate the HVAC Oct 4, 2019 · You should be able to squeeze it and it will be cold. If both hoses are cold or the upper hose is significantly cooler than the lower hose, it could be a sign that the thermostat is stuck closed. Thermostat stuck closed: When the thermostat is stuck closed, the engine might overheat. If the thermostat is stuck open, an optimal engine temperature is never going to be reached, and there will be no or little heat available in the passenger compartment, and engine wear can increase. I replaced the thermostat yesterday after the temp guage on the dashboard was at about 30%, running cold, Suggesting the thermo was stuck open, Also the heating inside the car wasnt great, further suggesting the same problem. However, if the thermostat gets stuck in the closed position, the coolant can’t flow through the radiator and can make your engine overheat. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. In most cases when a thermostat is stuck closed, it is because the coolant inside has gotten contaminated. Nov 15, 2023 · If your car’s thermostat is stuck closed, immediately turn off the car and start thinking about how to replace the car’s thermostat. If not corrected Jan 31, 2023 · Remember: a stuck thermostat is terrible news for your engine, regardless of whether it’s stuck open or closed. When a thermostat is stuck open, coolant constantly circulates and the engine takes longer to reach operating temperature. if the heater blows cold but the heater core hoses are warm it is circulating but the heater core blend door may not be working. However, sometimes, this handy device can get stuck closed, leading to overheating and potential damage. Here are some common signs that your thermostat might be stuck closed: Overheating Engine: This is the most obvious sign. Mechanics typically start by checking temperature variations in the radiator hose Mar 21, 2023 · A spring of inferior quality will deteriorate earlier and fail to close the thermostat. The best way to fix this problem is to replace the thermostat. The engine won’t suffer immediate damage like if the thermostat was stuck closed. 1L engine. The Heat Is On. Dec 25, 2024 · Thermostat-Related Coolant Loss: A stuck closed thermostat can cause coolant to remain trapped in the engine, leading to high temperatures and potential boiling. to/3iPHNrjUpho Mar 4, 2013 · Hi all. Due to corrosion or aging, your car’s thermostat can get stuck in a closed position. Learn what cause it to fail, why it is important for the cooling and h There is a difference between a thermostat being stuck open and stuck closed. Engine undercooling: A stuck thermostat that remains open can allow coolant to circulate continuously, preventing the engine from reaching its optimal operating temperature. Dec 26, 2022 · A thermostat stuck in the open position is not as dangerous as one stuck shut. An inconsistent temperature gauge, in which the engine’s thermal temperature rises and falls, is one indicator of this. If this happens, the thermostat will not let the coolant reach the radiator, and, as mentioned above, the engine will overheat, causing severe damage. If the gauge quickly climbs to the red zone, the thermostat may be Mar 10, 2006 · If your thermostat was stuck closed, you'd have no doubt. Dec 24, 2012 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. In this video, I explain the symptoms of a stuck in a closed position thermostat. Engine overheating is a clear sign of thermostat failure. Oct 18, 2008 · I recently replaced my thermostat and i didn't drain the coolant. Those temperatures can reach boiling levels and steam can develop inside the engine and cooling system. Here’s what you’ll need from the tools: Jul 7, 2022 · If a thermostat is stuck closed, the engine might overheat, which can result in expensive repairs. Method 1: Mixed coolant types. This leads to overheating, which can cause severe engine damage. Underheating:-The only thing that will cause this is a thermostat stuck open, which i will go over right after this. Symptoms and signs of a stuck open, stuck closed, partially stuck open car thermostat. A malfunctioning thermostat may lead to various issues and should be dealt with immediately. The thermostat should open and allow coolant in once the engine is adequately heated. And the second problem indicates that your car is having difficulties reaching operating temperature and also, in this case, the heater core will not function well. Although I wouldn’t drive it like that forever because the engine is supposed to stay around 200 for best performance. Then we covered the second problem when the car thermostat is stuck open. Thermostats fail because they become weak, stuck open or stuck closed. ” When the engine has been sitting for a while and is not warm, the thermostat will be closed. Apr 5, 2024 · Due to corrosion or aging, your car’s thermostat can get stuck in a closed position. Dec 20, 2024 · If one is very hot and the other is cool, your car’s thermostat is likely stuck in the closed position. If it’s stuck closed, the coolant can’t flow to the radiator to be cooled and it leads to an Dec 22, 2024 · A bad thermostat can definitely cause coolant to bubble, leading to various issues in your vehicle’s engine. This can result in coolant loss due to evaporation, leading to low coolant levels in the radiator and reservoir. I know another person who can do it for a much more reasonable price. When your car first starts up, the thermostat is closed and does not allow coolant into the engine until it is warmed up. Aug 10, 2024 · Recognizing the Signs of a Stuck Thermostat. Consequences of a Faulty Jan 22, 2024 · So, overheating is the most common symptom, of a failing thermostat. The consequences of an “open failure” may be less catastrophic than those of a “closed failure” but are nevertheless undesirable for your customer. Aug 23, 2024 · Engine Overheating. If the thermostat is stuck closed, that means not enough fluid is going into the engine and the engine will overheat. However, a closed thermostat will lead to overheating, quickly damaging the engine from the inside. Contaminated Fluids: The thermostat serves as a passageway for coolant as it passes through the cooling system. A thermostat regulates coolant flow and maintains engine temperature. Nov 18, 2024 · Overall, it is important to address a stuck open thermostat as soon as possible to avoid potential engine damage and ensure your vehicle runs smoothly. Aug 10, 2024 · If you suspect your thermostat is stuck closed, you can perform a few simple checks to confirm your suspicions: Check the Coolant Temperature: Start your engine and let it run for a few minutes. I drove for 2 days thinking my new You can find complete video here - https://youtu. If the gauge quickly climbs to the red zone, the thermostat may be Jul 27, 2022 · Try starting the car – If the car doesn’t start, then the thermostat may be stuck closed. This is a fairly simple process that can be done at home with a few tools and a new thermostat. com, which may include unique, personal insights based on Remember, a common stuck closed thermostat symptom is engine overheating. This Oct 14, 2023 · -Thermostat is stuck closed-Radiator fins could be full of bugs/ dirt etc; clean it out. To check if the thermostat is working correctly, follow these steps: Start the engine and let it Jun 26, 2024 · Troubleshooting Thermostat Issues Stuck-Closed Thermostat. Jul 12, 2024 · I have a 2005 Buick Century with a 3. This article will discuss how to tell if your car's thermostat is stuck closed. Dec 5, 2010 · Other than that, if anything, a car overheating, if it's due to the thermostat at all, would be due to the thermostat stuck "closed", not "open", IMHO. Reasons for a Stuck Thermostat. Generally, contaminated coolant is caused by different types of coolant being used at the Mar 14, 2018 · Once this temperature is reached, the thermostat opens and allows coolant to pass through the radiator, hoses and engine to cool it off. -Worn out water pump thus not being able to circulate coolant correctly. By recognizing the symptoms, understanding the diagnostic process, and addressing the issue promptly, you can safeguard your vehicle and avoid costly consequences. Still, an engine that’s too cold won’t run efficiently, and its parts will experience excessive wear. If the hose is now firm and warm the thermostat is not stuck closed . Jul 8, 2022 · This article will guide you on how to fix a stuck thermostat. However, a faulty thermostat can also alternate between the two. 2. Overheating. A thermostat stuck open is less offensive than a thermostat stuck closed. In a pot large enough for your thermostat, bring clean water to a boil, then gently add the thermostat. The thermostat is said to be in a stuck closed condition when the main valve of the thermostat is stuck in a closed situation. What Is a Car Thermostat? The car thermostat is a valve between the engine and the radiator. Check the engine coolant – If the engine coolant is low, then the thermostat may be stuck open. Explore how a thermostat's failure, whether stuck closed or open, can lead to overheating, inefficient fuel usage, and costly engine damage. Debris, rust, or a mechanical problem can make the thermostat stay closed or open when it shouldn't. If it’s cool while the engine overheats, it suggests a stuck closed thermostat. was in red zone. When the thermostat doesn’t open up, it keeps the coolant from entering the Jan 25, 2023 · Yes, you can drive with a thermostat stuck open and do so indefinitely. Thermostat stuck open keeps the engine cooler. Below are common questions about car thermostat issues. The thermostat plays a crucial role in regulating this temperature,… Read more The main problems a thermostat can experience are being stuck open, stuck closed, or leaking. P0128 doesn't mean "thermostat stuck open", it means "engine took longer to reach a preset temperature than anticipated" Thermostat is just the fix 99% of the time because there really aren't many ways to make an engine take longer to reach operating temperature than normal. It regulates the coolant flow, allowing the engine to Oct 7, 2024 · Don’t Get Stranded: How to Know If Your Car Thermostat Is Stuck Closed and The Fixes You Need! Your car's engine is a complex machine, and like any machine, it needs to operate within a specific temperature range to function properly. It runs too hot in the summer. If the car cools down when you drive it on the highway, then it’s radiator fan, radiator fan switch or something that has to do with cooling the hot fluid in the radiator. Start the engine and allow it to warm up. How do I know if Dodge car thermostat is bad? Signs My Car’s Thermostat Is Going Bad or Has Failed Completely My Cruze is at a mechanic who wants to charge almost $1000 to replace my thermostat. The engine may lose power. Can I Drive With The Thermostat Stuck On Cold? Driving with a thermostat stuck on cold is risky. If there's an imbalance between them, it's probably a sign that your car's thermostat is closed. Temperature Gauge Monitoring. From overheating to low engine performance, a car thermostat that is stuck can cause serious problems. Safety Tips for How to Fix a Thermostat That is Stuck Open Dec 13, 2022 · It is much worse for an engine’s thermostat to stick closed, versus open. Closed is a major problem. If the thermostat is stuck open, the engine will not reach the minimum operating temperature. Oct 12, 2024 · If your car’s temperature gauge climbs above the normal operating range, it could be a sign that the thermostat is stuck closed, preventing coolant from circulating through the radiator. Thermostat stuck closed When your car’s thermostat is stuck open or closed, there are a series of nasty things that can happen. Q: Can a blocked thermostat cause a leak? A: A blocked thermostat can indirectly cause a leak if it’s damaged or corroded. This happened to me on my nissan 200SX, i chose not to believe my temp gauge and paid the price. Sometimes the thermostat fails and remains closed. Jul 13, 2023 · How to Fix a Stuck Thermostat That is closed thermostat stuck closed quick fix . The worst potential issue is an engine that overheats and catastrophically fails. To avoid this, you should go ahead and unstick your thermostat. If you suspect it is stuck open, don’t drive your truck. Crank the car and run to normal temperature and again squeeze the hose. Ensure the radiator fan is functioning properly. When the thermostat doesn’t open up, it keeps the coolant from entering the Spread the loveIntroduction: A car’s thermostat serves as a crucial component in the engine cooling system, ensuring optimal operating temperature is maintained. When your car thermostat stays on cold, you might worry. As you read above, your car’s thermostat can fail in one of two ways: by being stuck open or stuck closed. Some coolant leaked out of the hoses from radiator to thermostat and from expansion tank to the thermostat. With these steps, you can effectively fix a stuck open thermostat and keep your vehicle running in top condition. You can damage the engine if it gets too hot. Stuck open means too much coolant is being allocated to the engine, causing the engine to be abnormally cool. My question is, can I safely drive it ~6 miles home from the mechanic with the thermostat stuck closed? Stuck Closed: One common failure mode is when the thermostat becomes stuck in the closed position, preventing coolant from flowing to the radiator. Check for blockages in the cooling system, such as clogged hoses or a faulty water pump. The thermostat may also need to be replaced if the thermostat housing is leaking coolant. One of the lesser-known issues is the polar opposite of overheating. The coolant should be flowing in an open thermostat without the engine leaking. If the thermostat is stuck closed. Feb 5, 2021 · The main problems a thermostat can experience are being stuck open, stuck closed, or leaking. Nov 10, 2019 · Thermostat Stuck Closed. Can you replace a car thermostat yourself? Replacing a Car Thermostat: Step-by-Step Instructions. Jan 12, 2016 · A car thermostat regulates the flow of coolant through the engine and is an incredibly important player in the operation of your vehicle’s engine. A fully open thermostat when the engine is cold is almost always bad. If you have a "high" cluster, you can easily read the temperature in degrees. However, leaks Dec 26, 2024 · Sticking Open: A thermostat stuck in the open position prevents the engine from reaching optimal temperature, causing poor performance and increased emissions. With a heat-resistant glove on, squeeze the hose near the middle. 3. Aug 10, 2024 · Q: What happens if my thermostat is stuck open? A: If your thermostat is stuck open, the coolant will constantly circulate through the radiator, potentially causing the engine to run cold and inefficiently. 1. Dec 26, 2024 · Sticking Open: A thermostat stuck in the open position prevents the engine from reaching optimal temperature, causing poor performance and increased emissions. This failure often results in coolant leaks due to excessive pressure. I thought i could fill up the expansion tank and be good. The cooling system does not run while the engine overheating. If it’s warm but not hot, it indicates a stuck open thermostat. If a thermostat is "stuck" that means it is over-cooling or not cooling the engine enough. Submerge it fully. Check for any air pockets in the cooling system. What Happens if a Thermostat is Stuck closed. Pro Tips are nuggets of information direct from ASE-certified automobile technicians working with CarParts. Apr 10, 2023 · Again, the car thermostat is likely to blame. Fortunately, unsticking a car thermostat is relatively simple and you can do it in a few steps. The thermostat, therefore, stays fixed in the open position. Jul 2, 2024 · Due to corrosion or aging, your car’s thermostat can get stuck in a closed position. The lower radiator hose would warm up as soon as the engine was started if a thermostat was stuck open. Inspect the thermostat visually to see if it’s already stuck in an open or closed position. Jun 4, 2023 · Stuck-Closed Thermostat . Sep 2, 2024 · Symptoms of a Stuck Car Thermostat. Stuck-Open Thermostat. Below are the signs that your Focus’s thermostat is stuck open. The thermostat allows coolant to circulate through the engine, and without the circulation, it can reach extreme temperatures. Jul 13, 2023 · When a closed thermostat becomes “stuck,” it is either over-cooling or under-cooling the engine. A car thermostat is a crucial component that regulates the engine’s temperature by controlling the flow of coolant. Your temp gauge would go all the way up and stay there and if you didnt shut the engine off you'd blow it up. If the thermostat is stuck closed, the coolant will remain in the engine rather than circulate to the radiator where it cools. The most common symptom of a bad thermostat is overheating. The thermostat, when closed, keeps the coolant in the engine until it reaches a certain temperature. If it remains below normal operating temperature, the thermostat may be stuck open. Your engine might not heat up properly. So, do not allow the radiator to overheat. To quickly tell if your thermostat is stuck, watch the flow of coolant through your radiator. Jun 27, 2022 · How To Unstick a Car Thermostat? Sticking car thermostats is a common problem that can cause a variety of issues. A thermostat failure Jan 1, 2022 · Your vehicle’s thermostat opens to allow coolant to flow through the radiator and cool the engine down. Although a stuck closed thermostat can cause overheating, modern thermostats more often fail by opening too soon or sticking open, which generally causes the engine to run too cool. This can lead to overheating as the heat from the engine will not dissipate. May 15, 2024 · Detecting a stuck-closed car thermostat is crucial for preventing engine damage and ensuring optimal vehicle performance. A thermostat that is stuck open has the opposite effect. I drove my car the next day and soon the coolant temp. This can lead to overheating and potential engine damage. The correct coolant temperature thermostat regulates this system to operate in ideal conditions. Stuck Open: Conversely, if the thermostat gets stuck in the open position, the engine may not reach its optimal operating temperature. If there is no coolant passage at first, and even when the car heats up, you have a stuck close thermostat. Replace the thermostat – If you suspect that the thermostat is the problem, then replace it. In other words, intermittent temperature changes are also a symptom of a bad thermostat. Aug 1, 2024 · In this case, one question often arises: “Can a bad thermostat affect heat in a car?“ Yes, a malfunctioning thermostat can indeed affect the heating in a car. A stuck-closed thermostat prevents coolant from circulating. Thermostat stuck open. Jun 30, 2023 · How to Fix a Stuck Closed Thermostat . Aug 20, 2024 · Faqs About Car Thermostat Issues. Aug 26, 2024 · If the thermostat is stuck closed, you may notice coolant buildup around the housing. Aug 21, 2024 · If the temperature does not rise by much, your thermostat is stuck open. And, as mentioned above, the engine will overheat, causing severe damage. If the thermostat becomes stuck in the closed position, the circulation of the coolant is blocked so the coolant cannot get to the radiator to be cooled which causes the engine to overheat. Intermittent Temperatures. Nov 18, 2022 · The first is when the thermostat is stuck closed and your car tends to overheat. An open thermostat will force the engine to run cooler than usual, which attracts various consequences: The engine’s rate of wear and tear will increase. A broken closed thermostat is a major issue. Thermostat Stuck Open. Nov 14, 2024 · How to Test a Thermostat on a Car. The heater doesn't provide warm air even after the engine has been running a while (though there are other possible causes including a bad heater core). Table of Nov 15, 2023 · Diagnosing a stuck closed thermostat involves examining the cooling system. Is it possible the thermostat is stuck at a midway position between fully closed and fully open? Also, I found two thermostats on an auto store’s website that can fit my car Jun 28, 2023 · To test the thermostat, the temperature gauge should be monitored. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Jan 25, 2023 · Yes, you can drive with a thermostat stuck open and do so indefinitely. The fuel economy will fall. Open is not so bad. When stuck, the coolant is not allowed to enter the engine, resulting in long-term thermal overload. This is due to the fact that a thermostat stuck in the closed position will impede the flow of coolant between an engine’s block and the radiator. Sticking Closed: A thermostat stuck closed causes overheating, leading to engine damage. Keep an eye out for these symptoms to catch a stuck thermostat early and fix it in time. That’s because a stuck-open thermostat will cause an overcooling condition that prevents the engine from running optimally. On the other hand, if it is stuck closed, the engine will overheat within a few minutes. Engine overheating: A stuck thermostat that remains closed can prevent coolant from flowing through the engine, causing it to overheat. In this article, we’ll discuss three ways to determine if your car’s thermostat is stuck closed so that you can take May 24, 2023 · Due to corrosion or aging, your car’s thermostat can get stuck in a closed position. The thermostat controls the flow of coolant to the engine and the radiator. Dec 10, 2010 · Thermostat stuck closed. Replace the thermostat. Since you replaced your thermostat, you drained the coolant. However there are time when you might notice a thermostat that is stuck close with no heat which might mean that your car thermostat requires a replacement see this replacement guide here. If they are the same, then the thermostat is stuck in the open position. Mechanisms Behind the Issue. … Nov 1, 2024 · What Does It Mean for a Thermostat to Get Stuck Closed? When we say a thermostat gets “stuck closed,” it means that the system is not receiving the signal to turn on the heating or cooling system, even when the temperature deviates from your desired setting. Oct 6, 2019 · In this video i will be teaching you the difference between a car thermostat being stuck open and being stuck closed and if it is dangerous and what are the A stuck thermostat is only one possible cause of a car overheating (but it can be the easiest cause to fix). Jun 15, 2016 · A properly and routinely maintained cooling system will have a smaller chance of its thermostat getting stuck closed. You may hear the phrase “the thermostat was stuck open or closed. If your car thermostat is stuck closed, the coolant will not be able to circulate properly, leading to the engine overheating. On the other hand, your car’s thermostat can be stuck open. But, maybe I'm wrong. Thermostat symptoms and replacing (ABA Engine) Feb 2, 2022 · The most common problem for a defective thermostat is corrosion from old antifreeze, causing the thermostat to become stuck in the closed position. If you find out the thermostat is bad, you have just one option – car thermostat replacement. If the radiator hose remains about the same temperature, but the dashboard gauge rises dramatically, your thermostat is stuck closed. One sign of this is an erratic temperature gauge where the engine goes up and then down in thermal temperature. One of the components of your car’s cooling system is the thermostat. Check the temperature of the radiator hose. Mar 28, 2024 · However, the thermostat does fail at a certain point, leaving the valve stuck open or closed. Take the temperature of the lower radiator hose as well. Faster i drove, it cooled off,but at idle it was overheating. Ensure the engine is cool before attempting any repairs. This, in turn, leads to rapid overheating. Due to this, the coolant is not allowed to circulate through the radiator even above the set temperature. To do this, start your engine. Overcooling Nov 11, 2019 · The thermostat in your Nissan Pathfinder's engine plays a crucial role in regulating its temperature. Mar 1, 2018 · While this situation may not be life-threatening to your car, your comfort and fuel bills will suffer until you get it fixed. A thermostate that is stuck in a closed position will cause overheating & no heat. Unsticking the thermostat involves the same steps as replacing it and considering that it only costs $5 – $20 you should always replace it with a new one. This causes an overheating issue indicated by a check engine light or your temperature gauge with an abnormally high reading. When you forget to change your coolant or use the wrong kind, your thermostat can get stuck. Observe the temperature gauge. Alternatively, let your car idle for a while and open the hood with the engine still running. Signs of a Bad Thermostat There are several signs that a car’s thermostat is malfunctioning and needs to be replaced. Some of the most common symptoms of a bad thermostat are no heat, a spiked temp gauge, a blown head gasket, and more. The thermostat controls how much coolant is circulated throughout the engine. If it becomes stuck closed, coolant can’t circulate properly. Rather than trying a DIY method to unstick the thermostat in your car, Jun 6, 2024 · This comprehensive guide will explore the symptoms of a bad thermostat in a car, how to distinguish between a bad thermostat or water pump, stuck closed thermostat symptoms, and other related issues. So, the best thing you can do is replace your stuck thermostat with a new one. Learn more to keep your car running smoothly. Then, carefully touch the radiator hose near the thermostat. However, a thermostat stuck open will lead to overcooling. Thermostat Stuck Closed Apr 14, 2024 · Stuck Closed Thermostat Signs: 5 Common Symptoms. Establish the Baseline Dec 14, 2023 · If it is making weird sounds, the thermostat may be stuck closed. be/uGRvGOA6yrsA few products I personally own and use:Antifreeze filler funnel - https://amzn. The temperature for the radiator hose should be lower than the temperature of the engine. Here’s what can happen to your car’s health when your thermostat sticks closed, blocking off the movement of your coolant through the radiator: Temperature gauge goes into the red If the thermostat is stuck closed then the upper hose wouldn't be hot as no hot coolant from the engine block will be passing through the thermostat. To test a thermostat on a car, start the engine and let it reach its operating temperature. If the thermostat is stuck in a closed position, it won’t allow coolant circulation to the engine and the radiator. If the upper radiator hose rises to about the same temperature as the engine block, your thermostat is allowing the coolant to flow properly. The thermostat stuck closed issue can be fixed by removing the radiator cap or opening the car’s bonnet. Q: Can a bad thermostat cause engine to Overheat? A stuck-close thermostat will not allow coolant passage to the radiator for the cooling process, thereby causing the engine to heat up swiftly and eventually cause an engine to Overheat. Understanding how this happens can prevent further complications. Here’s my problem: The engine takes too long to warm up in cold winter weather. If this happens, the thermostat will not let the coolant reach the radiator. Jun 27, 2022 · If the thermostat is stuck closed, it can lead to an over-pressurization of the system, which can cause the air conditioner to blow warm or cold air. If the thermostat is only partially stuck, you will notice a sudden drop in the car’s temperature. Jun 10, 2024 · The symptoms of intermittent thermostat behavior can vary depending on whether the thermostat is stuck open or closed. You might lose some efficiency from running a cooler engine but it’s not that big of a deal. If you can see coolant bubbling through the thermostat housing that means the gasket is worn and needs to be replaced. Not only will it work better, but you can trust that it won’t fail anytime soon. Dirt and rust can make things May 14, 2009 · Besides the heavily clogged radiator, if the car continues to run hot when you drive it on a highway, then it is likely to to stuck-closed thermostat. The radiator fans are working at both high and low speeds. Will a car run hot without a thermostat? Running an engine without the thermostat can cause the engine to overheat due to the coolant passes through the engine too fast and will not let the coolant absorb the heat from the engine. Nov 27, 2024 · Wondering if a faulty thermostat could be draining your coolant? This article uncovers the surprising link between thermostat malfunctions and unexpected coolant loss. The Check Engine light may come on too. tqc eunar fkjaw sksrqr yvee imdcoo mvm gbsygs ptg mqmc