Need Help, Coolant Coupler at Heater Core

jettaway03 · Jul 21, 2017

I am leaking coolant and traced it to leaking at the Heater Core couplings on the firewall. I can't find any how-to's on how to tackle this. Is it as simple as replacing the old with new?

Any help is appreciated.

UhOh · Jul 21, 2017

Just simple O-rings: be sure, however to get the correct ones (I use 1stvwparts.com to look up part numbers- I also get parts from them). There's a slight trick to getting the couplers off, but if you look around you can find out what that is: I seem to recall it being a "duh" thing.

The hoses can be joined together to bypass the HC. Just wanted to toss that out if you need to drive the car but are keeping from doing so because of the leak.

jettaway03 · Jul 21, 2017

Thanks man. I hope I am just overthinking. I just don't want to yank the things and cause problems at the heater core connection. The think the leak is slow enough for me to wait for parts.

If anyone else has tips on getting the couplings out, let me know.

where2 · Jul 22, 2017

jettaway03 said:
If anyone else has tips on getting the couplings out, let me know.

I have a new MkIV heater core in a box in my living room if you need photos of what the "lost in the dash" portion looks like when it is out in the open where you can see it.

gforce1108 · Jul 25, 2017

There is a spring clip you push out (kinda rotates up/out) which frees the ears securing it in position. Then it just pops off. The connector is clamped to the heater hose and clipped to the heater core tubing.

hughesjasonk · Jul 27, 2017

UhOh said:
Just simple O-rings: be sure, however to get the correct ones (I use 1stvwparts.com to look up part numbers- I also get parts from them). There's a slight trick to getting the couplers off, but if you look around you can find out what that is: I seem to recall it being a "duh" thing.

The hoses can be joined together to bypass the HC. Just wanted to toss that out if you need to drive the car but are keeping from doing so because of the leak.

when mine went I was able to find the o-ring in the plumbing section of lowes/home depot

Need Help, Coolant Coupler at Heater Core

jettaway03

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UhOh

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jettaway03

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where2

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gforce1108

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hughesjasonk

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