Coolant leak

N54Plant · 10-22-2024, 02:20 PM

I just had one of the original coolant lines replaced, everything was good for the drive back and then the car dumps all of its coolant basically at once. Not sure what this pipe or line is called and if they’re any diy solutions out there. Any advice would help. Oh and the leak is coming from the driver side and isn’t a water pump issue. Not sure why I can’t upload a video but there are the best pictures I could get

Morbidio · 10-23-2024, 10:24 AM

I replaced mine two days ago as it broke while I was driving.

That’s the video I watche, don’t know if it’s the same on your car if you have a 335i?

Boza13 · 01-20-2025, 12:24 PM

Helpful video. Thanks.

TheMidnightNarwhal · 01-20-2025, 12:50 PM

When it comes to coolant leak, in my experience, only you can diagnose it and find the issue. You need to look and inspect and find where it's coming from. If you can't find it like that using a pressure tester usually helps a lot.

There are common failure points like the hose that runs on top of the rad or the mickey mouse flange but other than that, you will have to dig in and find it.

But being on driver's side I'd assume maybe the top rad hose or radiator.

10-22-2024, 02:20 PM	#1
N54Plant Registered 0 Rep 1 Posts Drives: BMW 335i Join Date: Oct 2024 Location: Cambridge iTrader: (0)	Coolant leak I just had one of the original coolant lines replaced, everything was good for the drive back and then the car dumps all of its coolant basically at once. Not sure what this pipe or line is called and if they’re any diy solutions out there. Any advice would help. Oh and the leak is coming from the driver side and isn’t a water pump issue. Not sure why I can’t upload a video but there are the best pictures I could get Attached Images
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10-23-2024, 10:24 AM	#2
Morbidio New Member 0 Rep 15 Posts Drives: BMW E91 320D, BMW F20 118D Join Date: Dec 2012 Location: Sweden iTrader: (0)	I replaced mine two days ago as it broke while I was driving. That’s the video I watche, don’t know if it’s the same on your car if you have a 335i?
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01-20-2025, 12:24 PM	#3
Boza13 New Member 2 Rep 5 Posts Drives: BMW E91 Join Date: Jan 2025 Location: Serbia iTrader: (0)	Helpful video. Thanks.
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01-20-2025, 12:50 PM	#4
TheMidnightNarwhal Major General 2876 Rep 6,432 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	When it comes to coolant leak, in my experience, only you can diagnose it and find the issue. You need to look and inspect and find where it's coming from. If you can't find it like that using a pressure tester usually helps a lot. There are common failure points like the hose that runs on top of the rad or the mickey mouse flange but other than that, you will have to dig in and find it. But being on driver's side I'd assume maybe the top rad hose or radiator.
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