Coolant leak coming from the driver side of the engine?

Tiny
BEETLEPUNK21
  • MEMBER
  • 2015 DODGE JOURNEY
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
I have a coolant leak coming from the driver side of the engine. The first photo is from the top side. The second and third photo I removed the driver side wheel and zoomed in from up under the wheel well. I’m trying to figure out exactly where the leak is coming from. The red mark is where it is dripping down on the engine block. Your thoughts and assessment?
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Monday, April 28th, 2025 AT 5:59 PM

7 Replies

Tiny
BEETLEPUNK21
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  • 124 POSTS
Possibly it’s coming from here?
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Monday, April 28th, 2025 AT 6:04 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
You bet, that was going to be my suggestion. I would remove the thermostat housing assembly to inspect the O ring seal they use to seal the coolant from leaking. Also, check the housing for cracks in the plastic. Please upload images of the failure when you get it apart so we can see the problem ;)
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Tuesday, April 29th, 2025 AT 11:54 AM
Tiny
BEETLEPUNK21
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Are there any special instructions when installing the thermostat and housing? I bought the thermostat and housing and installed it, and it is leaking worse than what the previous one was.
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Friday, May 2nd, 2025 AT 4:03 PM
Tiny
KEN L
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Just a torque specs, did you clean the gasket surface, also did you see where the old gasket/housing failed?

Here is a guide that may able to help:

https://www.2carpros.com/articles/car-is-leaking-coolant

Check out the images (below). Let us know how it goes.
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Saturday, May 3rd, 2025 AT 11:21 AM
Tiny
BEETLEPUNK21
  • MEMBER
  • 124 POSTS
The picture you sent was for a six cylinder. Mine is a four-cylinder. I took a chance and put blue RTV sealant on all three of the inlet/outlets of the new thermostat housing. It was one I bought from Amazon. I just now ran the engine for a good 30 minutes and no leaks!
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Sunday, May 4th, 2025 AT 5:09 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help.
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+1
Monday, May 5th, 2025 AT 10:07 AM
Tiny
BEETLEPUNK21
  • MEMBER
  • 124 POSTS
Thank you car pro’s for your help. I am so grateful to have found this website!
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Monday, May 5th, 2025 AT 10:47 AM

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