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23

If the thermostat is operating properly the radiator will only come into play when the thermostat opens, when the engine is at normal operating temperature (around 190 degrees, give or take). Adding a gigantic radiator won't make a bit of difference because if the engine gets too cold, the thermostat will close, causing the engine to heat up again. In the ...


16

I would like to drive the car to the nearest qualified service, but there is a fair distance to it (about 8km) as I'm living in a remote location. Is it safe to drive it that distance if I refill the entire coolant tank? I would say yes, you can drive the car. Load the car with much more water than you think necessary: I find that two liter ...


9

It sounds like the engine thermostat has failed in an open state. The thermostat regulates the flow of coolant between the radiator and the engine. When the engine needs more heat, it closes and cuts-off flow through the radiator. When the engine needs less heat, it opens and allows flow to the radiator. With the thermostat stuck open, the flow through ...


7

First thing I'd try to figure out is how quickly it leaks - run it, stick your head underneath it as check if there is any visible leaking. If there is, chances are that it's not going to make it for 30 miles. I'd also check for any evidence of oil and water mixing. If there is, don't drive it. If it's not leaking that badly I'd be tempted to top it up with ...


7

I agree with Timo - if it is a big enough leak that you can see it clearly, then getting the car transported is much safer. In general, using water as coolant is OK for a short time or as a "get you home" alternative, but it does not have the anti-freeze and corrosion inhibiting properties of a proper coolant mix, so should not be left in the engine for ...


7

The heater core is part of continuous loop of engine coolant propelled via the water pump, flowing through caverns in the engine, through pipes that run through the firewall into the heater core, back out the firewall, and finally through the radiator. If the thermostat dictates it (due to a temperature limit being reached), the fan blows air over the ...


7

This particular bottle is knows as a degas bottle. The reason it has a strange shape is two fold. First, the bottle needs to fit somewhere and the shape helps that. Second and more important is that these degas bottles hold pressure. The shape reinforces the bottle so that it does not explode. In cooling systems with degas bottles the coolant does not ...


6

First thing is to initially determine if you're burning it or leaking it. Assuming your car isn't spewing a plume of white smoke when you're driving - you will have to do some additional diagnosis to determine the method of consumption. First check the oil and coolant - if either contain a milky substance you have a cracked something or a blown HG. ...


6

The thinner radiator might make it easier for the cold air to flow through the engine compartment. (The radiator itself wont cool an already cool engine at all if the thermostat is intact.) In cold environments it is often necessary to use a grille cover to limit cold air flow to the engine. Grille covers are especially necessary with small diesel engines ...


6

Without water and without antifreeze or just without antifreeze? I'll assume that you mean without either, but you should clarify the difference in the future. This is really simple though. The engine will overheat, quickly, and the seals and gaskets will give out, letting fluids leak in and out of places they should or shouldn't be. Eventually, parts of ...


6

The cooling system is sealed and pressurized, so under ideal conditions, nothing goes in or out. "Drying" is simply evaporation followed by the carrying away of the evaporated water by air. In reality, there is a slight opportunity for evaporation out of the overflow tank, which is not sealed/pressurized on many vehicles, but as the coolant in there is much ...


6

I'm assuming that this person was advocating putting a small amount of dish soap in the water used to do a coolant system flush. I would not do this to my car as routine/preventative maintenance, I would simply use water for a flush. My concern would be that any dish soap residue remaining in the system may adversely affect the chemistry of the coolant, ...


6

Failure Modes Mechanical thermostats fail in one of two ways: Stuck-closed The pintle/spring doesn't retract to permit flow at the set-point temperature that is usually stamped on the thermostat itself. which can lead to the engine running at hotter than expected. If hot enough, this can lead to serious issues such as a compromised head gasket or ...


5

Your coolant shouldn't be boiling at 100C/212F if you have a proper mixture of water and anti-freeze (typically 50/50 ratio is recommended). Water's boiling point is 100C/212F. Even though it is called anti-freeze, it also raises the boiling of the water. You can buy a coolant mixture tester for a few dollars at a local auto parts store, you suck some of ...


5

First, if it runs hotter during slower speeds (the 25mph-50mph you mention), I would think this is a sign that you're not getting enough airflow through the radiator. This might be a fan issues, but it might also be some other obstruction that prevents sufficient airflow. You said you hit a deer and had the radiator replaced as a result. I would check or ...


5

It could be your thermostat - if it is not reading temperatures properly it may not trigger your fan until temperatures get really high. Being stationary with the engine running is usually the time when this can happen, as there is no cooling airflow until the fan comes on. Run the engine with the bonnet (hood for US-ians) and see when the fan starts - is ...


5

Does your car overheat too? If so, you could have a faulty thermostat, an air pocket in your cooling system or maybe even a leak somewhere. My truck's heat would only work while I was driving, then stopped working altogether while the engine started to overheat. I changed the thermostat, then the heat would blow hot/cold/hot/cold, I didn't realize you had ...


5

Single digit temperatures would not freeze your coolant assuming it has antifreeze mixed in appropriately and isn't just water. Since you went from 250 to 150 within seconds I would assume something was blocking the flow of fluid. Thermostat staying shut would be the most likely culprit. It could be that the cold weather is pushing a failing thermostat ...


5

tl;dr: Your radiator cap might be working as advertised and releasing a bit of overpressure. The difference is points one and two is telling. In point two, you're explicitly staying out of boost on the turbo. Steady state cruising really doesn't require the turbo to spin up. In point one, you're explicitly relying on the turbo quite a bit. This is going ...


5

Because the coolant stops circulating when the engine is turned off, the engine actually keeps getting hotter for a while after the engine has been turned off. If the engine gets hot enough (above 112 degrees Celsius/ 230 Fahrenheit) the aluminium cylinder head can start warping, causing uneven pressure on your head gasket, causing it to blow the next time ...


5

Get rid of the extra fans. If you're having to run fans constantly to keep the engine at the right temperature in the city, then all you're doing is masking another issue. You probably have several other issues. The engine temperature and the transmission going being able to shift into overdrive should be independent. It seems like you are conflating two ...


5

It's certainly not recommended, but I don't think it will ruin it, as long as you don't leave it in for too long... Flush the coolant system thoroughly to get rid of all traces of contaminants, and refill with proper coolant - it might be worth then doing another flush a few days later if you're worried.


5

It would make no difference if you are standing still or driving the vehicle. You want to ensure you have the heater wide open when you do it to ensure you are getting the old fluid from the heater core as well as the engine. Driving the vehicle around will probably allow the process to happen a little faster, as you engine will get up to operating ...


5

The difference you observe is quite notable, so I wondered how reliable it is to just measure the density (which is what your hydrometer does). From the datasheet of your Ford antifreeze, the density is 1.10kg/l, while pure ethylen glycol has 1.10kg/l. Glysantin is another brand for antifreeze and states 1.122-1.125kg/l for its G48 (sorry, german) This ...


4

It looks like the problem was caused by a blockage in the hose connecting the radiator to the reservoir. Coolant was not always flowing back into the radiator as the coolant cooled. The repair shop cleared the blockage, and the temperature remains constant now.


4

You can see the corrosion on the pipe around the clip - even if Radweld or similar is able to temporarily stop the leak, I doubt that it'll last very long. At the rate that it's leaking, there is bound to be a bunch of fairly sizeable holes corroded into the pipe. For that reason alone I would change out the pipe as soon as I could. If that breaks (worst ...


4

If you think there is a leak and have 30 miles drive, then you can reserve some pure water with ride and use it. pure water is not alternative for radiator coolant, because water will be boil quicker than coolant. but its far better than running empty coolant. One more thing if you are living in cold area do not keep water inside radiator long ,It will ...


4

The 3.8 Natural Aspirated Engine was a rather solid design and were rarely known to blow head gaskets. Their weak point seemed to be the plastic Intake Manifold. Here are the three possible causes to your issue. If you are 100% sure that it's oil in the coolant then remove the intake manifold and check the Intake Manifold Gaskets upper and lower for any ...


4

I figure I'll post my own answer to the question today since it's the end of my 60 day window to request a refund. After all the things I tried, considering the Blue Devil attempt a failure, and starting the process to request a refund, I finally had success; the seal has held for over a month now. What it took in the end was driving 4 hours at 70 mph on a ...


4

If you are losing coolant (you say you have to add coolant daily), then there are only two places it can go. Either on the ground or in the engine. Check your oil to see if it's a milky color. If it is, then the oil and coolant are mixing and you will need the engine rebuilt. If not, then you probably won't need to replace the engine. Next, does the exhaust ...



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