Bubbling noise after water pump and belt were replaced

Tiny
MUNCHIE
  • MEMBER
  • 2006 JEEP LIBERTY
  • 3.7L
  • 6 CYL
  • 4WD
  • 135,897 MILES
Just had water pump and belt replaced, now I hear a bubbling noise from dash area from start up until I turn off the engine. Does not run hot.
Saturday, April 9th, 2022 AT 4:04 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
More than likely you have an air pocket in the heater core. Here is a guide that talks about this:

https://www.2carpros.com/articles/vehicle-bubbling-noise

Basically, we may need to drain and fill the cooling system again if you are not able to get it purged but I would suggest starting with using a fill funnel as shown below and that should help work the bubbles out.

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

Please see the picture below and then we can take the next step. Let me know if you have questions on this.

Thanks
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Sunday, April 10th, 2022 AT 7:24 PM

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