Question about Volkswagen New Jetta

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Smoke from the vents after upper heater hose replaced

I have 1998 vw jetta glx. my upper heater hose burst and i replaced it and refilled the coolant. Now once the car gets warm i get white smoke/steam out of the vents.

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  • johndjohnson May 09, 2009

    could the heater core cause the original overheat/burst?

  • johndjohnson May 09, 2009

    yes I am losing coolant. I think I will bypass the heater core to see if there are any other problems. thanks.

  • Richard Scordino May 11, 2010

    Heater core may have been marginal. Overpressure from overheat likely caused it to begin leaking. OR, you damaged the fitting coming out of the heater core when replacing hose...either way, it needs to be replaced.

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Smoke through the vents indicates a heater core issue. If you are losing coolant and / or getting coolant inside the car (check the floor boards) this would tend to confirm a heater core. Best of luck to you.

Posted on May 09, 2009

  • Greg Margossian
    Greg Margossian May 09, 2009

    If a heater core becomes clogged, the coolant will choose the path of least resistance, in this case being a worn heater hose.

  • Greg Margossian
    Greg Margossian May 09, 2009

    If my solution helped, please take the time to rate my solution. Thank you very much.

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You've lost engine coolant somewhere, and need to fill the engine back up with the VW special G12 coolant.

Then find the leak, which will be in one or more of the following places -
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Reply back what you find. If the engine got too hot, you may need to have the thermostat replaced.


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