coolant leaking behind the firewall - heater core?

1996 VOLKSWAGEN JETTA

COUNTYCOP6

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There is coolant leaking behind the firewall. I have concluded that it must be the heater core. Is this correct? If not, what else could be causing this?

Jun 12, 2008 at 12:53 AM

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DANNY L

CAR REPAIR CONTRIBUTOR
5,648 POSTS

Hello, I'm Danny.

Here is the information you requested. Here is a tutorial showing how to replace a heater core:

https://www.2carpros.com/articles/replace-heater-core

I would check the heater core hoses first at the firewall to see if it is a bad or leaking connection first. I've attached picture steps below on how to replace the heater core on your Jetta. Hope this helps and thanks for using 2CarPros.

Images (Click to enlarge)

Aug 5, 2021 at 9:42 PM