Coolant steaming up the windshield

[wizard_len]

Hello again all! I just replaced the heater core on my 89 Turbo (with a lot of help from you folks...thanks once again!). Finally got it all back together and everything functional, but I am still getting some rushing/gurgling sound once the thermostat opens and after a few minutes it begins to steam up the windshield and even the instrument cluster. Could the heater control valve be causing this or do I have to start tearing it apart again? Other suggestions, perhaps. All help appreciated. Thanks.

Len

 

[IJ.]

Got a leak somewhere, did you replace the o-rings in the pipes?

 

[jetjock]

Ugh. This is why I say pressure test before putting the dash back in.

 

[OfnaRcR4]

You don't want to hear it but, what the wise men said.

 

[Avicii]

had some problem and i eventually said FUGGIT! i can do with out heat, hope you had the clamps that attach the pipe to the actual core and as IJ said those pesky o-rings can cause leaks

 

[Satan]

I used a replacement heater core from a local autoparts and the pipes/fittings were sketchy to me, so instead of using the o-rings, I just soldered the other pipes on, like others had done/suggested. No problems, no leaks, and more importantly, no coolant smell in the cabin (finally).

Only way to fix it, is to fix it again... sorry.

 

[mcammarn]

could be a defective heater core also. had it happened to me once. but also check you have all your lines tight and orings not torn.