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  1. #1
    Master Lancista Professorgearhead's Avatar
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    Series 2 heater core question

    I’m pretty sure the heater core on my series 2 1,600 is gummed up. I renovated the on/off cock and it now works fine, but there just doesn’t seem to be much heat coming through the system. I’ve looked on line and find plenty of info on the series 1 heater core removal, but the only info I can find about the series 2 is that removal is “diabolical”. Can anyone corroborate this and/or steer me toward a link that describes the removal process?

    one thought was to run a radiator core cleaner through the whole system (Prestone and all the other manufacturers seem to offer these), but I’m afraid that might bring on a serious case of heater core incontenince, and so better left alone, considering that I drive the car mostly in warm Canadian summers. I’d appreciate any thoughts on this.
    Thor Frohn-Nielsen
    '72 Lancia Fulvia 1600

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    Master Lancista Norvox's Avatar
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    Re: Series 2 heater core question

    First thought; See if can find a local brake/cooler/ac specialist. My local specialist costed me
    200 dollars to replace the core. These guys now their stuff incl. our Lancia.
    Nikolaj Skovron
    1971 Lancia Fulvia 1,3S Coupe

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    Legendary Lancista fay66's Avatar
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    Re: Series 2 heater core question

    Are you sure all the air is out of the system?
    Is the fan motor operating correctly?
    If everything is OK then before removing the heater core, bearing in mind the cost of a recore,and what a cow of a job it is to remove, then it's got to be worth adding a cleaner, thoroughly flush and back flush the system (bypass the heater valve if possible) to see if it helps, then after refilling and bleeding thoroughly if it hasn't improved things, so be it, if not you then know which way you have to go.
    Brian

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    Master Lancista Professorgearhead's Avatar
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    Re: Series 2 heater core question

    Brian: I never considered air in the system. Do you have a technique for bleeding it? I like your idea of simply flushing the heater core (and backflushing it too). That sounds like a good idea. Yes, the fan works.
    Thor Frohn-Nielsen
    '72 Lancia Fulvia 1600

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    Legendary Lancista fay66's Avatar
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    Re: Series 2 heater core question

    I usually undo the inlet hose to the valve, tie a bit of string to the end then get this up as high as I can.
    Remove the rad cap.
    Using a funnel slowly fill the cooling system from here as this gives you a good head of water, although it is a bit slow.
    Once the radiator is full replace the hose.
    Then run the engine to get any remaining air out, running the engine at a fast tick over.
    I think that's about it,
    Preferably take the car for a short run.
    When cooled down top up, and run to clear any remaining air.
    My 2c is a series 1 so the layout is different, but same procedure, and making sure heater control is set to maximum heat.
    Brian

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    Legendary Lancista lancialulu's Avatar
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    Re: Series 2 heater core question

    From my experience S2 Fulvias fill from the rad without air locks. There is a bleed valve on the heater return pipe (it is positioned near / over the bell housing in the rubber pipe. I have never had to use it to get air out.

    I would back flush the heater core (low pressure) and see if you have flow ( make sure the heater tap is on ie pulled out....)

  7. #7
    Master Lancista Professorgearhead's Avatar
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    Re: Series 2 heater core question

    Thanks for all the words of wisdom. I will report back, but probably not for a couple of weeks: we’ve had unseasonably poor weather here and my garage is cold!
    Thor Frohn-Nielsen
    '72 Lancia Fulvia 1600

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