Car Is Overheating With Full Coolant

Buick Newbie. The radiator was replaced only about 6 months ago due to a crack in the tanks. A 50/50 mix of antifreeze and water is the most commonly used coolant in modern automobiles. There can be a number of causes ranging from severe engine problems to the car simply being fed up of sitting in a long summer traffic jam. A common electrical problem on modern cars is the temp sensor that turns on the radiator’s electric fan using a relay, you have a sensor, a relay and a fan also a fuse and all the wiring as possible failure points. Clogged or Damaged Radiator. A while ago in the workshop there was a Great Wall V240 diesel ute that was having major problems overheating. So it seems my Cruze is overheating, the water is near boiling and reading about 90c. It has 50,000 miles. Coolant too full. Turn on the heater full blast when engine is at normal temp, that can help remove an air pocket in the cooling system, then top off radiator with coolant once cooled. Keep looking into the top of the radiator. Check out the tech article on Car Overheating Problems & Troubleshooting, brought to you by the experts at Mustang Monthly Magazine. I have a obd1 aba engine that says its overheating when it is not. This should get coolant flowing through the top hose and fix your problem. Short and to the point. HGeat will build up and your engine will overheat, If you don't have enough coolant in there to do the job. Car Radiator. The combustion of fuel inside the motor is what produces heat. This one is a little more complex because it could be any number of things. If the coolant inside the radiator is full and you did not have to add any, or not much anyway then I would look at the thermostat. Thermocure Coolant System Rust Remover, Safely Removes The Rust From Cars Coolin - New Tc001 for sale in USA | Lunny's Auto. The mystery arises though when magically the coolant disappearing from reservoir is noticed with no potential signs of leakage. When the car is completely cool pull off the radiator cap and look into the radiator the check the level there. You may take excellent care of your car, keeping the radiator clean and the coolant tank filled. My car has been running a little slow for a while, hesitates a lot when I pull away and my air con I don’t think works. Add a 1:1 mixture of coolant and water up to the full mark, and replace the cap. What might start as a pinhole leak in the finned section of the radiator will usually develop into a full-fledged squirting stream of antifreeze when the engine heats up. Radiator Flush. com homepage Prestone® is the number one branded consumer choice for antifreeze/coolant, brake fluid and power steering fluid in North America. What’s the best solution when deciding between water vs. It kicked on high speed at 231. If the coolant is not full, there will not be enough cooling capacity to keep the engine from overheating. Honda Civic LX '94 - The coolant reservoir is full, the radiator appears to have run out of coolant, and the temperature gauge's needle moving closer to the red section is suggesting that the car is overheating (or close to it). Now would be a good time to figure out what caused the initial overheating and correct it so the situation does not re occur. An annoying car alarm is an excellent investment, as properly as immobilizers and a steering lock. The most common symptom of a failed radiator fan is that the car is overheating on idle or at lower speeds because at higher speeds the car doesn't need the use of the radiator fan. The AC is OFF. Audi A3 Overheating/ Coolant problems Within weeks the car started losing all it's coolant. Coolant leaks are one of the largest causes of engines overheating. When I would rev the engine, the temperature would go down. Short and to the point. Jul 17, 2017, 7:00am While your car is idling, turn the heater on full blast; this lets the heater core act as a second radiator, extracting more. In a pinch, you can fill your radiator with tap water. Low coolant levels, dirty coolant can all lead to an overheating engine, which unless you want to pay big bucks on engine repairs shouldn’t be chanced. Keep looking into the top of the radiator. Quick Answer. Now would be a good time to figure out what caused the initial overheating and correct it so the situation does not re occur. Why is car overheating with no coolant loss and no thermostat problem? two things to look at, #1, radiator cap is faulty, its a cheap fix, $6-7. antifreeze for your car’s cooling system? Try using both. Usually about 30 minutes of running my car the coolant would have been pouring out of the gasket in between the intake manifold and the head. Not only should you check the level, but you should also make sure it is the correct mixture of water and antifreeze for the temperatures you're driving in, and also that there are no small leaks. turns out they never drove it very hard when test driving it to try and replicate my problem. Once you've established that the system is full of coolant, don't overlook the water pump. No issue with overheating. My car overheated the other day, and it was leaking coolant horribly. But still. RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. The Pontiac Solstice has an indicator to warn of Pontiac Solstice engine overheating. If the coolant inside the radiator is full and you did not have to add any, or not much anyway then I would look at the thermostat. It is recommended that car owners keep extra coolant in their cars at all times. Head gasket failure. I bought a can of Thermo Cure on line ,followed the instructions & drained the radiator after 3 days of driving around. When the fan isn't working, the coolant stays hot, which causes the engine to overheat and fail. There are many reasons why a car engine could overheat such as, cooling system leaking, radiator problems, bad thermostat or blown head gasket. This article applies to the Audi A6 C5 (1998-2004). We recommend having coolant replacement performed according to your car’s factory-recommended maintenance schedule. A car engine produces a lot of heat when it is running, and must be cooled continuously to avoid engine damage. If you're leaking antifreeze but not overheating or you have a car leaking antifreeze when parked, you still have a chance to repair your vehicle for a lower cost. Read on to learn how to diagnose it. An overflow tank that runs dry may result in the coolant vaporizing, which can cause localized or general overheating of the engine. The radiator was replaced only about 6 months ago due to a crack in the tanks. Radiator caps produce pressure in the cooling system. Car was towed to berglund Ford in bedford, virginia. Could this be the thermostat or mabey even a coolant temp sensor?. I have a 4 core radiator on my car it is not new probably original,my question is, when idling for a long period the other day my car got hot and i pulled the drain on the bottom of the radiator and the water was not even hot but it eventually ran out hot? why? is this an indication of a bad radiator? keep in mind that i am not running a thermostat so shouldnt all the water be hot? bad flow. What Causes Car Overheating And How It Can Be Fixed Car Hacks / October 23, 2017 October 22, 2017 Heat is the greatest enemy of a car engine, and as a driver, no one would like to see steam getting out of the bonnet. Radiator Flush. And it’ll help keep you off the side of the road. Set the HVAC temperature to full hot, with a middle fan speed. So I let the car run for 30 minutes. Not only should you check the level, but you should also make sure it is the correct mixture of water and antifreeze for the temperatures you're driving in, and also that there are no small leaks. Coolant is also shooting out of the overflow hose in the reservoir tank when car warms up. Still overheating at high speed (100kph). Car Overheating but the Coolant is Full? Low coolant is only one reason why engines will overheat. From a purely visual perspective, the most surefire evidence of a blown head gasket is the presence of leaked coolant along the gasket surface. Left alone, the liquid in the radiator eventually boils over, and steam rolls out from under the hood. If you have. If your car is overheating but there are no visible coolant leaks, or damaged hoses, then there is a problem with another part of the coolant system that is stopping the coolant from flowing freely around the system. Something is causing it to overheat. • The thermostat controls the coolant flow into the radiator. Buick Newbie. If the level is below the minimum mark on the reservoir, then there is a significant risk of overheating your engine. The car has been in for "tests" at least five times now. The water pump is driven by the engine through a fan belt. Running the engine for a few moments to circulate the coolant will bring the air to the top of the radiator, especially if you drive the car with what appeared to be a full radiator and then let it cool down for 20-30 minutes after driving to check the coolant level. then it would go into the red and say engine overheating stop and idle the engine. That was an expensive job. If the car is overheating, the first thing to do is pull over. To spot leaks quickly, you should regularly check under the car to look for pooling liquids before driving. I was told it had a "bubble in the coolant line. Choose your car for a more accurate estimate. It was about 12 inches over the 'full' mark on the dipstick and the oil was a light brown, muddy color. An annoying car alarm is an excellent investment, as properly as immobilizers and a steering lock. Expert advice: what to do with an overheating car July 7, 2017 Overheating cars used to be a familiar sight, stopped at the road side, bonnet up, steam pouring from the engine. Overheating car engines can be caused by: Water pump failure. Using a pressurized radiator cap can raise the system pressure and thus the coolant boiling point. There are many reasons why a car engine could overheat such as, cooling system leaking, radiator problems, bad thermostat or blown head gasket. Many head gaskets have been blown out. First, always carry an extra bottle of coolant (also called antifreeze) in your car, as well as a jug of water. Once again, the engine started overheating. A radiator flush is performed to remove old engine coolant from the car radiator when new engine coolant is required. Overheating Engine. If you don't have enough coolant in there to do the job, heat will build up and your engine will overheat. They charged me $200 and said there was quite a bit of air in the system. There is an Pontiac Solstice engine coolant temperature warning light on your Pontiac Solstice’s instrument panel. It stays closed when you first start the car, so the coolant warms quickly. The car overheats just driving around the block. it wont cool off turning the heat on high temp,nor does it cool off because i try to cool it down. The sight of steam pouring out from your overheating bonnet is not only distressing, it can also be bad news for the health of your vehicle. If your antifreeze tank is low, and if you see a puddle of liquid under the car, you can resolve the problem temporarily without a tow truck. If the coolant doesn't move, coolant within the engine block gets very hot and is not replaced by cooler fluid from the radiator resulting in a quickly overheating engine. The problem isn't that the reservoir is full or not full the problem is that your car is overheating in the first place because only overheating will fill the coolant reservoir. Short and to the point. Are you sure your water pump is moving the coolant through your engine? (not a mechanic) What I would do to check: Leave the car for an hour to make sure it is cooled down. This can be due to radiator damage (high numbers of bent fins), but is most likely due to a faulty electric fan assembly, fan clutch, or fan switch. I've checked thremostat, water pump, there are no leaks on the hoses. 5 things to know about your car radiator and how to keep it cool. If the system is full and bled properly, and you still have overheating, you may want to enlist the help of a mechanic, like one from YourMechanic, to diagnose the cause of the overheating,. So do Autozone and some others. ), Radiator Fan, Thermostat, or something else. Once you get the racing radiator, you can tune to a about 15. There’s a leak in the cooling system may have a leak. Antifreeze in the oil can damage the cylinders and pistons. Toyota Camry: Why is My Car Overheating? An overheating engine is a stressful problem. If your vehicle overheats in traffic in normal weather, one of the following may be the culprit: The water and coolant and water level in the radiator is low. It will help to cool down the radiator and prevent future overheating. Car Overheating And No Heat. Chances are that it happens due to an internal or external coolant leakage or a leak in the radiator cap. If you have a bad radiator, the coolant liquid is going to stay hot. Start the car and see if the coolant is moving. This problem is especially relevant nowadays, when the temperature rises and traffic jams occur. it wont cool off turning the heat on high temp,nor does it cool off because i try to cool it down. After 2000, cars got more complex and many do-it-yourselfers got intimidated by the precise filling and "air-bleeding" procedures required to eliminate engine air pockets. The hoses are connected right on the reservoir, the coolant is a generic green coolant, the reservoir level when it was hot was FULL like up to the cap of the reservoir bottle. Today is 11/3/2017, no diagnosis made, no idea what the cause of engine failure is and we were told by the service department that they had no knowledge of the recall reporting this type of incident. An annoying car alarm is an excellent investment, as properly as immobilizers and a steering lock. After close inspection the area was bone dry. My brakes grind when I slow from high speeds. My Car Has an Engine Smoking & Burning Smell but Is Not Overheating While the sages and learned men among us may espouse that where there’s smoke, there’s fire, sometimes — especially where engines are concerned — smoke is just smoke. This heat expansion forces coolant out of the radiator and coolant reservoir. Test the car when overnight cold, otherwise the coolant inside the motor keeps cooling and dropping the pressure mimicking a leak. Something is causing it to overheat. My car heater is only blowing cold air, & started overheating. The car started overheating on middle of the highway, pulled over and checked the engine and reeked coolant. When it gets to the correct operating temperature, it opens, and let's the coolant flow through the radiator, where it then circulates through the entire engine. Then had the radiator removed and top pulled off and the core flushed. If engine overheating has occurred the coolant level will naturally be low due to expansion of the coolant from the extreme heat of the engine. Always use a blown head gasket tester. When preparing for a long trip, it's important to pack for both the journey and the destination. A blown head gasket, bad intake manifold gasket (V8 engines), a cracked block, or a cracked cylinder head may cause coolant to mix with engine oil. Coolant in your radiator is imperative for keeping your engine cool. Really hope I don’t have to get a lemon law attorney involved but I will. I read this could be bad radiator cap, so I ordered and OEM version. A loss of fluid within the cooling system decreases the amount of heat transfer from the engine to the coolant, leading to overheating if left to dip below a minimum operating level. If you were asking a lot of your car, truck, or SUV when the overheating occurred, then you can most likely chalk the incident up to a case of over-exertion. :( Hi guys, In the last couple of days, noticed that the coolant overflow bottle is filling up and not returning the coolant back into the radiator. But the modern engine has far less tolerance, with its aluminum blocks and, often, aluminum heads. 38 Answers. 5 gallons of coolant. The fans should eventually cut in. advice? it's going back to SoP tomorrow. If that checks out check the clutch for the mechanical fan. It just takes a little time and patience. " Possible Cause A: This will typically be due to a leaking hose, gasket, water pump, radiator, heater core, head gasket or cracked cylinder head. Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. Overheating. When you check the oil, it’s above the full mark and coolant is on the dipstick. The antifreeze (coolant) flows through your car’s radiator, water pump plus engine cooling passages to keep it operating at the proper temperature specification. If the system is full and bled properly, and you still have overheating, you may want to enlist the help of a mechanic, like one from YourMechanic, to diagnose the cause of the overheating,. kinda stuck on this one. NEVER pour cold water over a hot engine! Step 5: Check for puddles. Starting price for Coolant Service: $89. Overheating troubleshooting, inspection and repair. A broken or malfunctioning one can easily cause your car to overheat. With the engine running, smell the coolant itself - if there is a whiff of exhaust gas , the cylinder-head gasket may be leaking. An engine that runs too hot can damage the vehicle and threaten your safety. It boils out, it gets low, the car overheats. Just wait until the car is cooled off. If it's not safe to pull over for some reason, then using the heater might help. I'm not certain about the timing, but it seems that the overheating problem is usually presaged by the sound of liquid swishing around somewhere under the hood while driving. TOM: Here's why. If the coolant is not full, there will not be enough cooling capacity to keep the engine from overheating. Overflow out of the radiator is usually a bad cap (or overfilling as stated before). An overheating car is a sign that something is wrong, and you can be in line for major repairs if you ignore the issue. Car is overheating, coolant wont stay filled up was created by Tykimeister I currently drive a 2001 Chevy Empala with 220,000 miles. If you have. That might happen if a coolant hose bursts, but it's far more common for an engine to overheat without any outward signs. Your car is far from ordinary, so when it comes to choosing antifreeze, ordinary coolant won't do. I bought a can of Thermo Cure on line ,followed the instructions & drained the radiator after 3 days of driving around. When the radiator will no longer take any more coolant, put the radiator cap back on the radiator. No issue with overheating. PPS: essential on. The first step to diagnosing an overheating car is to check the coolant level. It's dangerous to drive a car that's prone to overheating. When your car starts overheating, add in a bit of antifreeze or water. A 50/50 mixture of water and ethylene glycol antifreeze in the cooling system will boil at 225 degrees if the cap is open. Toyota Camry 1997-2001: Why is My Car Overheating? Why your car is overheating can be traced to a few locations under the hood. Let the car idle few minutes more with the expansion tank full, also now that the the car is hot and coolant has expanded the amount of coolant on the overflow tank should be what you will see after driving the car for awhile, once the engine cools down it'll return some of that coolant to the engine and it will have noticeable less coolant. When there's white smoke, check first for coolant leak. You shouldn't continue to drive if you see the temperature gauge has moved towards the "hot" side. but you'll have to do a full coolant flush and find the blockage to fix it. With the engine cold, fill the overflow reservoir to the "Full" line with your coolant mix. If you were running the car hard and idling would help reduce the temperature of the engine in a natural way, let it idle until the temperature gauge reads normal temp. In the old days (generally before 2000), changing your vehicle’s coolant was simple. With advancement of technology, car overheating is not a common problem anymore. The coolant is then passed through the radiator, which cools it off and circulates it back through the engine to remove heat again. As always, the car experts at Pep Boys are happy to discuss your specific vehicle's recommended maintenance and offer a range of services including comprehensive coolant system evaluations. can overheat under the right circumstances, which is why you need to be proactive about car maintenance. Let's figure out the problem. This eventually means leaks and losing coolant which will cause car overheating. Open the bonnet and you can usually see this. Coolant loss. But as long as the system is sealed and holds pressure, a radiator cap rated at 15 psi will increase the boiling temperature of a 50/50 coolant blend up to 265 degrees. When there's white smoke, check first for coolant leak. This thread is just starting to run in circles now and we are just revisiting the same items over again so I believe it has run it's course and I am going to lock it now. You may love the heat of summer, but you need to help your car keep its cool when temperatures rise. Evans High Performance Waterless Engine Coolant does not contain water, so its boiling point is significantly higher. There’s a leak in the cooling system may have a leak. We would recommend checking your vehicle's coolant level in accordance with the car's owner's manual and checking the cooling fans for proper operation when your engine is warmed up and idling. Radiator cooling fans airplane LOUD Overheating 2004 not spin up to full speed and my car would over heat. Car is overheating, coolant wont stay filled up was created by Tykimeister I currently drive a 2001 Chevy Empala with 220,000 miles. The Mishimoto performance aluminum radiator is designed and engineered to maximize cooling efficiency, boost engine functions, and most importantly protect your car from overheating. It also helps to remove excess heat from the engine. Engine coolant, also known as antifreeze, is mixed with water to keep the radiator from freezing in extreme cold and overheating in extreme heat. This is especially. The Pontiac Solstice has an indicator to warn of Pontiac Solstice engine overheating. Antifreeze in the oil can damage the cylinders and pistons. If your car is overheating but there are no visible coolant leaks, or damaged hoses, then there is a problem with another part of the coolant system that is stopping the coolant from flowing freely around the system. Using a pressurized radiator cap can raise the system pressure and thus the coolant boiling point. Original radiator. You can also buy a repair bandage for leaking hoses, but this is a temporary measure. The first step to diagnosing an overheating car is to check the coolant level. If you put the wrong coolant in your car, or if the coolant-to-water ratio is off, your engine my have problems staying cool. Car keeps overheating and blowing out coolant through overflow changed tstat fan is blowing pretty sure pump is working - Answered by a verified Auto Mechanic We use cookies to give you the best possible experience on our website. I too smell antifreeze and my kids ride in this car. With advancement of technology, car overheating is not a common problem anymore. Twenty Reasons Why Your Engine is Overheating In this Truck Radiator guide we are going to go over 20 reasons why your engine may be overheating. An electric cooling fan also helps lower the temperature of the coolant, which prevents overheating. How to Change Coolant. The loss of system pressure and the loss of coolant causes overheating as the coolant boils - creating steam bubbles that escape into the overflow (the bubbles you are seeing). So I let the car run for 30 minutes. That fan or a second radiator fa. Take your car out for a short drive and see if it is still overheating. Car Overheating Causes. A red coolant light temperature warning in the winter—more typically seen in warmer months—can be critical, because it means the car is overheating. 7 and towing group has been overheating and losing coolant from the overflow bottle. One of the major causes of a car overheating is a leak in the cooling system. 1st: Make sure the coolant level is correct, and there is plenty in the over-flow tank. An overheating engine is a serious problem that could cost your Audi A6 C5 a new engine. Original radiator. The Heater Core. Short and to the point. Orange vs green: coolant basics you need to know If I have Dexcool in my car can I leave it in for the life of the car? inhibiting coolant flow, which causes overheating. Car Problem - Peugeot 206 overheating. The thermostat housing is what the hose attaches to. You shouldn't continue to drive if you see the temperature gauge has moved towards the "hot" side. I pulled over and noticed, again, that the reservoir had no coolant in it, so I popped the cap off to refill it. Coolant leaks are one of the largest causes of engines overheating. Overheating can be caused by anything that decreases the cooling system's ability to absorb, transport and dissipate heat: Low coolant level; Loss of coolant (through internal or external leaks) Poor heat conductivity inside the engine because of accumulated deposits in the water jackets. Wait until the engine as cooled off and locate and slowly remove the coolant reservoir or radiator cap and check the coolant level. Antifreeze serves two purposes. There are no exceptions! There are no exceptions! All car brands and models, Ford , Chevrolet , Honda , BMW , etc. This condition causes coolant to leak into the combustion chamber. There is signs of coolant in the top tank when i top up - so the radiator is not dried up. Your car is most likely overheating due to a low coolant level or a problem with your engine's cooling fans. Check out the tech article on Car Overheating Problems & Troubleshooting, brought to you by the experts at Mustang Monthly Magazine. Overheating Is No Joke. No overheating. New temp guage installed. If your car is like that, you may be able to see whether or not the coolant is full by looking at the side of the bottle, although it's still important to check when it's cold. Common Causes Of Auto Radiator Overheating. You may love the heat of summer, but you need to help your car keep its cool when temperatures rise. Really hope I don’t have to get a lemon law attorney involved but I will. It is Reduce air intake temperatures Full aluminium construction with durable, TIG-welded end tanks. It is recommended that car owners keep extra coolant in their cars at all times. There are other problems that may cause overheating, but they are much rarer. New/rebuilt engine. If your car is overheating but there are no visible coolant leaks, or damaged hoses, then there is a problem with another part of the coolant system that is stopping the coolant from flowing freely around the system. He also noticed that my fans kicked on after the car temperature read 221. When your car overheats, you shouldn’t panic at all but instead, find out what the problem is quickly before things run out of hand. Overheating Engine. With the engine cold, remove the radiator cap and examine the coolant. It just takes a little time and patience. For this vent to work as intended, the container must be airtight. If you continue to drive your car with low antifreeze your vehicle will eventually overheat. If what you see after twisting off the radiator cap looks brown, muddy, rusty, or has debris floating in it, you’ve most likely got a clogged radiator. If needed, fill coolant to the top of the radiator. It will help to cool down the radiator and prevent future overheating. If it's not safe to pull over for some reason, then using the heater might help. Step 1 When you first notice your Cruiser overheating, you need to immediately check the coolant level of your car. The Heater Core. A proper air/fuel mixture will help your engine run cool and to its full potential. Several reasons are there for causing this problem. To eliminate possibilities , unplug the radiator fans switch at the bottom of the radiator and jumper with a paper clip ( with the ignition switching the ON position). If your car is overheating but there are no visible coolant leaks, or damaged hoses, then there is a problem with another part of the coolant system that is stopping the coolant from flowing freely around the system. Now I chased this overheating all around my car I thought the radiator leaked because I saw a plume of smoke coming from it I thought. Your car is far from ordinary, so when it comes to choosing antifreeze, ordinary coolant won't do. Choose your car for a more accurate estimate. If your vehicle overheats in traffic in normal weather, one of the following may be the culprit: The water and coolant and water level in the radiator is low. Radiator blockage. Many people who own classic cars accept engine overheating as a necessary evil, but you don’t have to. Flushing the coolant system is relatively easy. After 2000, cars got more complex and many do-it-yourselfers got intimidated by the precise filling and “air-bleeding” procedures required to eliminate engine air pockets. If this is the case, call a tow truck for further assistance. Follow the upper radiator hose to where it connects to the engine. Damaged radiator cap. We recommend having coolant replacement performed according to your car’s factory-recommended maintenance schedule. Keeping your vehicle's motor running smoothly and at the proper temperature is almost always a matter of staying on top of maintenance, not ignoring warning signs and making sure not to push things too hard under extreme driving conditions. If you weren’t towing or driving up a particularly steep grade, however, there could very well be a problem with your vehicle’s cooling system that needs to be addressed. The thermostat regulates your engine temperature. When you notice your engine overheating, the best thing to do is get your car towed to the nearest mechanic. PPS: essential on. the temp gauge is on cold then rise to normal range it also goes to the high end of the normal range. This one is a little more complex because it could be any number of things. Original radiator. These can send coolant into the oil, which can ruin bearings and ultimately spell death for your engine. You may notice that coolant has collected on the ground under your car or that your reservoir tank is not as high as it should be. Whatever the cause, it is imperative that you find the source of the overheating and get it fixed. Ford Mondeo Mk3 - Tdci - Strange overheating problem, only at speed - Cyd : Sounds to me like you may have a blockage in your heater matrix. "My BMW doesn't seem to be overheating initially, but it does keep losing coolant, which eventually causes an overheating situation. The main goal of your car's cooling system is to remove heat from your engine block by running coolant through cooling passages and transfer that heat to the air through the radiator at the front of your car. If the coolant inside the radiator is full and you did not have to add any, or not much anyway then I would look at the thermostat. Your car may not immediately explode or anything like that, but driving with an overheating engine can cause serious damage to your vehicle. The potential causes of a car overheating at highway speeds are a stuck thermostat, a restricted radiator, or a kinked hose. *Yes, your car IS overheating, even though you don't see clouds of steam and vapor pouring out from under the hood. Coolant leaks are one of the largest causes of engines overheating. Chances are that it happens due to an internal or external coolant leakage or a leak in the radiator cap. The car overheats just driving around the block. The Heater Core. Coolant leaks are one of the largest causes of engines overheating. If the leak turns out to be in the radiator, you can save the cost of a radiator, at least for a while, with products that stop leaks in a car's cooling system. There are really only three common causes for coolant leaks, although each type of leak has several possibilities, varying in severity. DO NOT remove your radiator cap if your vehicle is overheating! The cooling system is under pressure and if you remove the cap, you could get a face full of scalding coolant and steam. This condition causes coolant to leak into the combustion chamber. Get an instant estimate for your car and book a certified mechanic to perform the service at your office, or wherever your fleet may go. Check out the tech article on Car Overheating Problems & Troubleshooting, brought to you by the experts at Mustang Monthly Magazine. Follow the upper radiator hose to where it connects to the engine. You should get at least what you drained or if you pulled the two block drains that are on each side of the block just below the headers, it will take about 2. Your car uses coolant - usually made up of 50% antifreeze and 50% water - to cool your engine down, especially during the hot months of summer. Is the upper hose hot now that the engine is at normal temp,. There's no visible "leak" anywhere (water pump' date=' radiator, heater core, hose pipes, engine block) but it sometime starts bubbling out from the coolant resorvoir on the side. The potential causes of a car overheating at highway speeds are a stuck thermostat, a restricted radiator, or a kinked hose.