Why does a modern car overheat after a few minutes of driving?

“reached this temp after about 40 mins of driving. immediately shut it off and it’s been sitting since.”source ↗

“i hear a very faint nail in a blender sound coming from the engine bay. it also doesn’t rise quickly. it just slowly rises until it hits this point.”source ↗

“I replaced the thermostat and did what I thought was a good attempt at bleeding the air out but the car is still overheating once it gets driving for a few minutes but the gauge showed it was fine when I had it idling.”source ↗

“Mechanic can’t figure out why my car is overheating and I want it fixed. Help!”source ↗

“During the afternoon it blows warm air until I’ve been driving it for about 5 min then it kicks in. Then after about 15 min of driving with the AC my 2014 Toyota Corolla slowly starts to overheat.”source ↗

“I don’t know what to do other than take my car to the mechanic while it’s overheating so they can actually see.”source ↗

“I’m not gonna buy it, just trying to troubleshoot it.”source ↗

“I’m not gonna buy it, just trying to figure out what’s wrong”source ↗

“It overheats terribly, to the point after 10 minutes of driving, it blows the bottom hose off the overflow tank and leaks all the water.”source ↗

“I have replaced the radiator overflow cap, the thermostat, lower radiator hose and now the water pump. Drove it tonight and it did it again, probably after 3 or 4 miles.”source ↗

“Running out of possible things it could be.”source ↗

“car overheating again”source ↗

“in Late june it started overheating again. took it to the shop as soon as i could, again, never letting it get to high.”source ↗

“however when i got the car back, a few bolts were loose, and both serpentine belts werent at all tight”source ↗

“since ive noticed coolant loss. Specifically when i turn on the heater”source ↗

“I had a funny feeling this mechanic was a bit too like this but i didnt trust my gut!”source ↗

“i burped it like 3 timed and vacuum filled it to to make sure of no trapped air, yet my temperature will still randomly creep up if i leave the heat off when im driving more than 30mph what could it be ?”source ↗

“It does drop slightly, I assumed it was the air pockets getting filled”source ↗

“It still overheats SOMETIMES we're pretty sure its not the head gasket because oil and coolant are both fine.”source ↗

“The sometimes overheating is what's really keeping us stunned.”source ↗

“Today I was driving and an engine overheat idle notification came up on my dash. I looked at the temperature gauge and it was in the red line.”source ↗

“My question is has this happened to anybody where you get an engine overheat notification but the engine really wasn't overheating?”source ↗

“I'm not convinced this issue is fixed but I'm not sure what to do.”source ↗

“I paid $250 for my mechanic to tell me nothing is wrong even though my car certainly isn't acting normal and I'm getting a little frustrated.”source ↗

“I can't really afford to keep throwing money at the problem.”source ↗

“2001 Nissan frontier overheated a few days ago. Checked the coolant and it was low so I added more and it seemed to fix the issue. But today it overheated and started making this knocking sound. Added coolant and temperature went to normal but it’s still making the sound. Any idea what’s causing this?”source ↗

“Engine overheated last night, coolant very low.”source ↗

“Definitely a coolant leak somewhere but does this tapping sound indicate a deeper issue?”source ↗

“Having a hard time telling if this is a crack on the radiator drain plug as well and in like link there’s a video of two loud pops when shutting the car off”source ↗

“car overheats under load sometimes touching H when going uphill on highway”source ↗

“I see microscopic bubbles in coolant only when it’s really warm up or revved at 3k rpm I need help to rule out headgasket”source ↗

“I already replaced the thermostat could you rule out a head gasket from this info ?”source ↗

“i want to know if i should return my 13 durango to the dealership or if it’s something easy to fix. my truck overheated changed the radiator water pump and thermostat as well the housing. after burping the system out it last for 20 min go straight back to overheating.”source ↗

“to where the resivour it bubbles and coolant starts bubbling from there and coming out. i honestly have no ideas what else it could be but just want to see if anyone could possibly know.”source ↗

“can ECT sensor one on the engine block, cause the car to overheat and when the car is overheating, the fans do not come on”source ↗

“Yes, when the car overheats the cooling fans do not come on only when I turn the AC on. So one thing I know for sure I know the fans are working perfect.”source ↗

“Recently changed the coolant adapter on my 2011 ford escape and the engine is still overheating with no coolant leaks.”source ↗

“After I put the new one on it filled it back up with coolant. I feel like the plastic is lodged somewhere within the radiator maybe which may cause it to overheat but I don't know please help”source ↗

“Yea the upper radiator hose did feel pretty hard when I squeezed it and I didn't know you had to burp it either.”source ↗

“Recently my temperature gauge has been creeping up farther than I would like on my Mustang. It usually happens when I’m idling (the radiator fan is working) and will stay there for a little bit before it reluctantly decides to go down and the process just repeats itself. What kind of issue am I looking at, thermostat? Maybe I need to add some coolant? The gauge is very wonky and chooses when it wants to work as well so I’m wondering if it’s just a bad reading”source ↗

“after running for some time, the engine temperature gradually rises and eventually overheats.”source ↗

“When the engine gets hot, the car also starts jerking/bucking and losing power.”source ↗

“after saying 3 different things and i did all of them and still have overheating i didn’t trust him anymore…are you sure about this ? And how can i examine it by myself if i can”source ↗

“Yes. I get a message on the screen for engine overheat”source ↗

“As the question says, I’ve got a 2007 Honda CR-V that’s running hot (maxes out the gauge after a few miles, no longer driving it), has no AC if the throttle is depressed (but it will kick back on if I’m stopped), and has no heat. The coolant is draining from the reservoir, and the radiator itself has been low.”source ↗

“I got the car pretty cheaply in a pinch a couple years ago and I’m just not trying to find a new one or make repairs worth more than the car itself.”source ↗

“I’ve only seen head gasket repairs in the thousands, my car is only worth 1000”source ↗

“I have a 2024 Toyota Corolla that Im looking at tomorrow. It’s the one with the 2.0 and electric water pump, and it’s been overheating after only a few minutes of driving.”source ↗

“Whenever I see the temperature start to rise I just start to blast the heat instead of the AC and it goes back down to normal.”source ↗

“Car was running hot on my way home from work, about 3/4 up (breifly a little higher). Pulled over and found I was missing about 1.5 liters of coolant.”source ↗

“Still, there's a steady stream of bubbles, and the fluid level is steadily rising and falling.”source ↗

“my bulletproof 1999 Toyota Solara with 439k miles has developed an overheating problem. After parking, the radiator is bubbling fluid across the top.”source ↗

“Wondering where is the best place to start with diagnosing the issue.”source ↗

“the car will run fine down the freeway, running a bit below the halfway cold/hot point. Then, it will rise to nearly the red zone.”source ↗

“I turn the AC off, turn the heat on, and that brings engine temp down and AC might run as cold as 50 degrees, even on a scorching hot day. But within 10 mins, it will start to climb to a dangerous level, cycle repeat.”source ↗

“temp gauge was almost as high as it goes but i don’t think it reached the top yet i looked at the oil and coolant and they don’t look contaminated i also don’t see smoke out of my exhaust however i saw a slight vapour coming out off the radiator when i was bleeding the engine after it reached a operating temp idk if it was exhaust gases or something else”source ↗