car leaking water

I own a BMW 750 Li, and I'm only putting water in it for coolant. My car is using up the water quickly. I have to keep adding more water all of the time. I know my car needs to have the original coolant in it, but it had a leak. Do you have ideas or suggestions? Thank you.
Experienced mechanics share their insights in answering this question :
Hi, thanks for writing in about your BMW 750i. Water alone is not meant to handle the cooling of the engine. If only water is used in the cooling system, the water will boil off and become nothing because the engine reaches much higher temperatures than it takes water to boil.

The antifreeze that is added to the water increases the boiling point and decreases the freezing point allowing the mixture to reach much higher temperatures than water alone.

Although you have a leak, you will lose fluid much slower if you add the correct fluid to your cooling system because water alone will boil off. Even if you didn’t have a leak at all, the water would eventually run out and your engine would likely overheat.

I would recommend having your cooling system pressure tested to detect the leak, and then have the leak repaired in order to prevent any further engine damage.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

One issue that may arise in your BMW. Coolant leaks can stem from a handful of problems: damaged radiator, a bad head gasket, or a weak radiator cap. As soon as you notice a coolant leak, you will want to seek professional help right away, as this can lead to very serious problems for your engine.
If your BMW is leaking water inside, it could be a sign that there is problem with the A/C. However, that is not the only possible culprit. This issue could be caused by a poorly installed windshield, an old sunroof, excessive corrosion, or broken seams in the vehicle`s body panels.
The most common reasons for a car leaking coolant are: radiator corrosion: a damaged coolant hose; or a water pump with a leaky gasket.
If you suspect coolant has leaked into your engine, stop driving immediately and see a mechanic.
While driving with a coolant leak doesn`t pose an immediate threat to your well-being, we highly recommend that you avoid doing so. Driving a car that is leaking coolant can cause serious damage to your engine. Your engine can overheat, costing you big time.
It could be a leaking hose or a radiator hole. Solution: Check to see if any coolant is leaking from your hoses. If you find coolant flowing out of the hose(s), replace them. It`s a simple fix if you find coolant leaking from your thermostat.
Should I Worry If My Car Is Leaking Water? No, a car leaking water isn`t a major cause for concern. Since water leaking is generally due to air conditioner and exhaust condensation or a damaged rubber seal, the issue won`t impact your vehicle`s performance.
It may be a broken hose and/or a hole in the radiator. Solution: Check your hoses to see if any coolant is coming out. Replace the hose(s) if you notice coolant coming out of them. If you notice coolant leaking out of your thermostat that can be an easy fix.
The average cost to fix a leaking radiator is $340, with a range between $125 and $600. Your total cost will depend on a number of factors, such as the type of repair needed, the type of radiator you have and the materials required.
Only Use Water In The Radiator In An Emergency

If it`s really low or actually empty, you need to add fluid to your vehicle. While it`s ideal to add a 50/50 mix of coolant and water (or a pre-mixed coolant), if you absolutely have to keep driving, you can add water to the radiator to get you to your destination.

Can you top your coolant up with water? Coolant should only be topped up with water in case of an emergency when the coolant liquid level is lower than it should be. While topping up with water will help you get safely to the nearest RAC Approved Garage and identify any issues, it shouldn`t be relied upon.
Depending on the severity of the leak, it can last from 10 to 50 thousand miles. In a severe case, the solution may not work at all. If your car is leaking, you should look for a better radiator repair solution.
Antifreeze (aka coolant) is pumped through your vehicle`s engine as you drive, absorbing excess heat and exchanging it with the outside air. That means an antifreeze leak could cause the engine to overheat — and that can lead to major engine damage.
A car radiator leak can reduce the effectiveness of your entire cooling system. If you don`t get it repaired, it could cause your entire engine to overheat — and that can cost a pretty penny to fix.
Technically speaking yes you can use plain water in your cooling system but it isn`t recommended as a long term solution and certainly not in extreme weather conditions.
The most common cause of radiator leaks is leaky hoses, but you can have leaks in the radiator itself, too, which can be a bigger problem. The coolant continually running from your radiator to your hot, running engine and back again creates a lot of pressure.
Technically speaking yes you can use plain water in your cooling system but it isn`t recommended as a long term solution and certainly not in extreme weather conditions.
As the unwanted holes are typically miniscule to begin with, a leaking radiator doesn`t immediately constitute an emergency situation. However, you should address the problem of a leaking radiator as early as possible in order to prevent the possibility of further issues.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

car is overheating and leaking water and anti freeze
ANSWER : Coolant leaks can occur because of cracked hoses, leaking gaskets, faulty water pumps, or damaged radiators. When the coolant level goes low, the engine will start to overheat due to the low coolant level. I would first recommend giving the cooling system a visual look over. If it is not obvious where the coolant leak is coming from, I would recommed having the cooling system pressure tested in order to determine the leak source. If you would like to have your cooling system pressure testedcoolant is leaking inspection, consider YourMechanic, as a certified technician can come to your home or office to inspect your cooling system.

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Water was spilled in the trunk which soaked the car battery. Car won’t start now. Does water destroy a car battery?
ANSWER : Hi, thanks for writing in about the concern with the BMW 320i. If the battery was submerged in water then it’s completely possible for the battery to short out and die. Your friend will need to have the battery replaced. Also be sure to get all of the water out of the trunk. Have a certified technician, like one from YourMechanic, help you guys out if you need assistance with replacing the battery. Good luck.

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My engine blew out due to my water pump leaking…i didnt have no problems with my car over heating, no steam, running weird,
ANSWER : It is quite likely that when the car was hit, the radiator may have been punctured which would have caused a lot of the coolant to leak out of the vehicle.

If the water pump failed or if it were low on coolant, there would have been overheating indications on in the dash, so you should have had some kind of warning either way that the coolant level was low.

If you’d like to get this fixed, consider YourMechanic, as one of our mobile technicians can come diagnose the leak firsthand and help address any other potential issues.

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Fuel EVAP line that runs under car is kinked how do I know if it is leaking? Also can I drive it like that if it’s not leaking?
ANSWER : Hi Ricardo. We answered your question earlier. However, if you didn’t receive the reply, here is what we stated earlier. In most cases, an EVAP leak will create an OBD-II trouble code. The best way to detect an EVAP leak is by having a professional mobile mechanic complete a check engine light inspection, they will be able to download the code and determine the source of the leak. That’s the best advice we can offer you. Thanks.

Read Full Q/A … : car leaking water

Fuel EVAP line that runs under car is kinked how do I know if it is leaking? Also can I drive it like that if it’s not leaking?
ANSWER : Hi there. In most cases, an EVAP leak will create an OBD-II trouble code, which is the best way to detect an EVAP leak. By having a professional mobile mechanic complete a check engine light inspection, they will be able to download the code and determine the source of the leak. In most cases, it’s an EVAP purge solenoid that is faulty.

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Oil leaking from under car and "remote control car" sound when car is first started for a few minutes until it warm up.
ANSWER : Hello,
There are a number of things that could make an engine noisy when starting up. Depending on the specific type of sound you are referring to, this will determine how to properly diagnose. If there is a bit of a hissing sound, this may be a sign of a vacuum leak. If this is more of a shrieking sound, this may be a sign of a worn out or out of adjustment serpentine belt. If there is a bit of a howling or growling sound, this may be a sign of a worn out or low on fluid power steering pump. A rattling or pinging sound may be caused by an ignition problem. An engine can ping (or knock) due to an improper combustion process. A "spark knock" is the result of combustion occurring too early. Early combustion can occur from carbon buildup inside the combustion chamber, a lean air/fuel mixture, and advanced ignition timing (spark plug firing too soon). A clattering type sound may be a result of improper lubrication in the valve train which could be a more serious problem and should be addressed as soon as possible. I would suggest having an expert from YourMechanic come to your location to diagnose and inspect your vehicle to ensure everything is in proper working order.

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I used stop leak to fix a slow leak in my water pump,it worked but the car went into limp mode after it.
ANSWER : Stop leak in the cooling system is likely to cause more problems than it will solve. Modern cooling systems are much more finely drawn and have far smaller passages than older cars, and stop leak will jam things up. I can’t think how it would make your car go into limp home mode however, unless it was a coolant level fault.Of course a code read is in order and that should tell the story. Meanwhile, it’s clear that you need to take care of that water pump problem It may appear to be fixed, but the leak will be back. If you want some help with this, you can Contact Your Mechanic. They can send a technician to your home or office who can read the codes on your Jaguar and tell you what this limp home thing is all about.

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My car is leaking coolant and telling me to stop the car and check coolant.
ANSWER : Going by your description and the age of the car, I’m going to guess you have a problem with your water pump. The water pump has a rotating seal that often doesn’t leak unless the engine is running. If your water pump is leaking you might be able to see a drip from the bottom of the engine front cover. Before jumping to any conclusions though, you should have a professional pressure test the system to be sure. If you contact Your Mechanic. they can send a technician to your home or office to check out your leak and tell you what it will take to solve it.

Read Full Q/A … : car leaking water