G37 Sedan

coolant leak

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Old Jul 10, 2022 | 08:05 AM
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From: DTX
coolant leak

Sitting in the drive thru after coming home from work i noticed my car was smoking from the engine bay. i popped the hood and found that the smoke was coming from the back of the engine, the liquid that sprayed all over the place is green.

wondering if anyone has had this happen because i dont know much about cars and its sunday so i cant find anyone yet to look at my car. im assuming maybe something cracked or a tube came undone but i cant tell from the angles i can see and could this mean i need a new car



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Old Jul 10, 2022 | 09:14 AM
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Dude- don't panic! Coolant leaks don't usually mean your G is finished. There's no way to tell exactly what happened to cause the leak, but just wait until the car has cooled down and check to see how much coolant you've lost. Refill if possible and take it to a shop on Monday to get a full visual inspection.

Be sure to report back on this thread and tell us what you find.
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Old Jul 10, 2022 | 09:38 AM
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tripps6x
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From: DTX
Originally Posted by dkmura
Dude- don't panic! Coolant leaks don't usually mean your G is finished. There's no way to tell exactly what happened to cause the leak, but just wait until the car has cooled down and check to see how much coolant you've lost. Refill if possible and take it to a shop on Monday to get a full visual inspection.

Be sure to report back on this thread and tell us what you find.
The weirdest thing is that the coolant in my reservoir is red so I don’t know where this green fluid come from
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Old Jul 10, 2022 | 10:16 AM
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Being the "incident" occurred behind the engine, more than 99% likely your heater hose connector broke. Unfortunately, this is a VERY common issue for these cars. Look behind the engine on the passenger side and you should be able to see if the connector has broken.

Here are some links to help inform and guide you. It is not a difficult repair, but due to lack of space it will be a little frustrating- especially in this summer heat and humidity.
DIY- Heater Hose
Another Heater Hose Thread

And, don't panic. Obviously you can not drive the car without coolant, but I am sure no damage was done.

Cold engine: open the radiator cap. What color is the coolant? Did someone recently "top off" the overflow (reservoir) tank?
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Old Jul 10, 2022 | 06:11 PM
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From: DTX
Originally Posted by ILM-NC G37S
Being the "incident" occurred behind the engine, more than 99% likely your heater hose connector broke. Unfortunately, this is a VERY common issue for these cars. Look behind the engine on the passenger side and you should be able to see if the connector has broken.

Here are some links to help inform and guide you. It is not a difficult repair, but due to lack of space it will be a little frustrating- especially in this summer heat and humidity.
DIY- Heater Hose
Another Heater Hose Thread

And, don't panic. Obviously you can not drive the car without coolant, but I am sure no damage was done.

Cold engine: open the radiator cap. What color is the coolant? Did someone recently "top off" the overflow (reservoir) tank?
I haven’t had anyone look at the car for about 6 months and no I don’t think anyone has done anything to the coolant or system but the fluid that shot everywhere is green as seen in the pictures and the fluid in the tank is red
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Old Jul 10, 2022 | 06:36 PM
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ILM-NC G37S
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Out of curiosity, is the "red" substance watery or oily? Sounds to me like someone may have "topped off" your overflow tank with a different type of coolant, perhaps.

Most automotive coolant (antifreeze) is green. However, different OEM's use different additives, compounds, and chemical formulations that are represented in different colors. For example, Nissan uses blue, Audi uses red, etc. Then there is yellow, turquoise, orange, the list is almost endless.

Find the source of the leak- likely the connector- and repair. From there, flush the system (including the overflow tank) and refill with fresh coolant. Either green or Nissan blue.

Last edited by ILM-NC G37S; Jul 10, 2022 at 07:13 PM.
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Old Jul 12, 2022 | 04:09 PM
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tripps6x
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From: DTX
Originally Posted by ILM-NC G37S
Out of curiosity, is the "red" substance watery or oily? Sounds to me like someone may have "topped off" your overflow tank with a different type of coolant, perhaps.

Most automotive coolant (antifreeze) is green. However, different OEM's use different additives, compounds, and chemical formulations that are represented in different colors. For example, Nissan uses blue, Audi uses red, etc. Then there is yellow, turquoise, orange, the list is almost endless.

Find the source of the leak- likely the connector- and repair. From there, flush the system (including the overflow tank) and refill with fresh coolant. Either green or Nissan blue.
it turned out to be the coupler.. costed 197$ to fix and now I’m back up and running
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