Sudden Coolant Leak

My car has been running fine and has never overheated. While I was driving the other day, I looked down and it said "coolant low, stop engine". I didn't realize I had a leak until I went to fill the coolant back up and saw it leaking all out from under my car. The whole coolant "tank" empties within a minute. It looks like it's coming from the bottom passenger side of the radiator and I also noticed some coolant dripped all down that side of the radiator as well. Checked the hoses and they seem fine. Tried stop leak and it had seemed to work until I turned the car b
Experienced mechanics share their insights in answering this question :
The radiator tank is cracked and the radiator needs to be replaced. Replace the upper and lower radiator hose and the thermostat at the same time. They will save you more work in the near future. If you need to have this taken care of, consider YourMechanic, as a certified technician will be able to come to your car’s location to replace your radiator and advise you on any other repairs that should be done.

How to Identify and Fix Common car Problems ?

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

An antifreeze leak can occur through a hole in your radiator. Corrosion of your radiator tubes or damage because of stones or debris can create a leak. You may also see a leak between the tank and radiator body over time, as the sealing gasket wears out.
The most common reasons a Volvo XC90 has a coolant leak are loose hose connections, a broken radiator, or a failed water pump. Search our network of RepairPal Certified shops near you to speak with a technician about your issue.
When you are losing coolant but no leak is visible, several parts could be the guilty party. It could be a blown head gasket, a fractured cylinder head, damaged cylinder bores, or a manifold leak. It could also be a hydraulic lock.
If you do see a coolant leak under your car, it could be from a blown head gasket, but it could also be from a number of other problems. Typically, if the head gaskets look normal, the problem is in the radiator. Remember, the coolant cycles through the radiator to lose heat it collected in the engine.
Chances are you have either a radiator cap leak, internal coolant leak or an external coolant leak. The longer you wait the higher the coolant leak repair cost will be. Learn how to diagnose your antifreeze leak and learn what to do next.
Still, you should have the problem remedied by a mechanic. Your radiator cap may be leaking, the heater core may be cracked, or holes in the radiator hoses may be causing the coolant leakage. Staying on top of your car`s health is just as important as staying on top of your car insurance.
You may notice radiator coolant (antifreeze) leaking under your car. Where the leak is coming from can tell you a lot. If it is coming from directly below the exhaust manifold, this is a clear indicator that the head gasket is failing and needs to be replaced.
Leaks just don`t quit leaking (in almost ALL cases). Broken things don`t magically heal. A coolant leak may stop leaking, but you can be sure it will be back, bad as ever when it decides to do it … and most likely it will be at a time when it will be completely inconvenient to you, have no doubt (think: Murphey).
Leaks just don`t quit leaking (in almost ALL cases). Broken things don`t magically heal. A coolant leak may stop leaking, but you can be sure it will be back, bad as ever when it decides to do it … and most likely it will be at a time when it will be completely inconvenient to you, have no doubt (think: Murphey).
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.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

No coolant in the reservoir. Seen low coolant message. I added 2 quarts of 50/50 coolant. Still getting the message. How much coolant doe it need?
ANSWER : Hi there. For the coolant light to go out, you would need to have the coolant between the low line and the full line for the light to go out. If the coolant is low and keeps on being low, then look for any signs of coolant leaks. You may have to use a coolant pressure tester to pressurize the reservoir to allow the leak to be found.

If you need further assistance with the coolant being low and the warning light being on, then seek out a professional, such as one from Your Mechanic, to help you.

Read Full Q/A … : Sudden Coolant Leak

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 … : Sudden Coolant Leak

My car has a coolant leak
ANSWER : Hello. The most common cause of a random coolant loss on this vehicle is a leaking intake manifold gasket. It commonly starts leaking coolant into the engine, which will be burnt off or will leak externally. I typically do a pressure test and a dye test on the system first to see if I can locate an external leak. If nothing is found, then I do a block test to make sure that there is not a head gasket issue. If nothing shows up there, then I replace the intake gaskets. If you need to have this done, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the coolant leak and replace the intake gaskets if necessary.

Read Full Q/A … : Sudden Coolant Leak

Coolant leaking 2009 Volvo Diesel D5 engine
ANSWER : Hello – coolant leaks have many sources, sometimes very subtle to locate. Since coolant evaporates on a hot engine, it is often hard to trace to it’s source. It is still possible you have a blown head gasket (early stages), or simply a leaking pipe/hose connection, freeze plug, or other housing that attaches to the engine coolant system. I would recommend a cooling system inspection by a mobile, professional mechanic trained in tracking down these problems, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Read Full Q/A … : Sudden Coolant Leak

Oil leaks into coolant & coolant leaks into oil
ANSWER : If the engine is not overheating or running badly, then yes an oil cooler is most likely the issue as it it will allow oil and coolant to mix. Other possibilities are a bad cylinder head gasket or cracked block, but this will generally affect how the engine runs as the combustion chambers are also affected. To have this checked, you may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the tools and expertise to diagnose the oil/coolant leak mixing and perform any needed repairs.

Read Full Q/A … : Sudden Coolant Leak

My car has a coolant leak – 2001 Lincoln Town Car
ANSWER : The heater AC (air conditioning) case has a drain to let out condensation from the case. The heater core is positioned in the case that allows it get out through the case drain on the outside of the engine firewall between the center toward the passenger side of the car in the case of a leak. Bypassing the heater core has stopped the leak but the heater and defroster is not inoperative along with the automatic temperature control of the air conditioner. I recommend having the heater core inspected and replaced to fix the system.

Read Full Q/A … : Sudden Coolant Leak

Car leaks coolant when left overnight
ANSWER : Hi there. In some instances, after a radiator is replaced, a coolant line can be left loose by accident or can come loose as the hose clamp gets hot. If the car is parked on a slight uphill slope, the radiator coolant might be leaking from one of the top cooling lines or from the radiator overflow reservoir hose.

The best way to know exactly where your vehicle is leaking coolant from is to have a local mechanic, such as one from YourMechanic, come to your location to complete an inspection to determine the source of the leak.

Read Full Q/A … : Sudden Coolant Leak

Leaking coolant and coolant jug has to be filled every other day
ANSWER : There are more than five different coolant hoses on your Mitsubishi Montero that may be causing the coolant leak. Without being there to physically inspect the vehicle, it’s hard to diagnose precisely which one is causing the leak. The fact that you’re refilling the reservoir every other day is alarming and should inspire you to have a local mechanic diagnose the source of the coolant leak before it creates a serious overheating situation.

Read Full Q/A … : Sudden Coolant Leak