Mystery Coolant Leak

JoshApple · 05-13-2021, 03:08 PM

I need help finding a coolant leak I'm having. Will produce a small puddle probably 2 inches long but that's it at most. Cannot manage to find where it's coming from.

I've attached the best pictures I can get from what I can see. It's coming from both sides of the car, driver and passenger. Seems to be dripping from both sides of the inter cooler.

Any ideas ? I need help lol

relative4 · 05-13-2021, 03:40 PM

If it's coming off both ends of the intercooler, it's most likely the radiator.

mousefarmer · 05-14-2021, 11:12 AM

replace the radiator, its bad.

Luis561 · 05-14-2021, 01:15 PM

Are you able to remove the Intercooler? It's pretty easy, with that in the way it's impossible to know where the leak is

IllSic_Design · 05-14-2021, 04:49 PM

Most likely the radiator is leaking at the plastic end caps where they mate to the aluminum radiator, seen it many times.

05-13-2021, 03:08 PM	#1
JoshApple Private First Class 12 Rep 117 Posts Drives: 2007 335i coupe Join Date: Jul 2019 Location: Fenton Michigan iTrader: (0)	Mystery Coolant Leak I need help finding a coolant leak I'm having. Will produce a small puddle probably 2 inches long but that's it at most. Cannot manage to find where it's coming from. I've attached the best pictures I can get from what I can see. It's coming from both sides of the car, driver and passenger. Seems to be dripping from both sides of the inter cooler. Any ideas ? I need help lol Attached Images
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05-13-2021, 03:40 PM	#2
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	If it's coming off both ends of the intercooler, it's most likely the radiator.
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05-14-2021, 11:12 AM	#3
mousefarmer First Lieutenant 133 Rep 323 Posts Drives: 2007 328i, 2006 330i Join Date: Apr 2019 Location: N/A iTrader: (0)	replace the radiator, its bad.
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05-14-2021, 01:15 PM	#4
Luis561 Second Lieutenant 95 Rep 269 Posts Drives: 2007 335i e90 Join Date: Mar 2020 Location: South Florida iTrader: (0)	Are you able to remove the Intercooler? It's pretty easy, with that in the way it's impossible to know where the leak is
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05-14-2021, 04:49 PM	#5
IllSic_Design Colonel 2124 Rep 2,758 Posts Drives: 09 E92 335i Join Date: Jun 2016 Location: Northern California iTrader: (1)	Most likely the radiator is leaking at the plastic end caps where they mate to the aluminum radiator, seen it many times.
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