504 + new radiator = cool heater
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  1. #1
    pur-john, not pew-john! peujohn's Avatar
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    Default 504 + new radiator = cool heater

    My brother has just fitted a reco'd radiator to his 504. Now, the heater which worked well before, doesn't blow hot air any more. Just cool/lukewarm air. I guess the new radiator works too well and keeps the coolant too cool. But it shouldn't really be like this. How can we fix it?

    John

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    John W

    1979 Peugeot 504 GTI 2.2 litre 5 speed - 72 kW at the wheels

    1974 Peugeot 504 TI
    - now on the road

    2009 Peugeot 407 HDI wagon - family car

    Previous: 2005 407 HDI manual sedan, 1980 504 GL, 1990 405 Mi16, 1977 504 GL Special, 1984 505 SRD Turbo



  2. #2
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    Quote Originally Posted by peujohn
    My brother has just fitted a reco'd radiator to his 504. Now, the heater which worked well before, doesn't blow hot air any more. Just cool/lukewarm air. I guess the new radiator works too well and keeps the coolant too cool. But it shouldn't really be like this. How can we fix it?

    John
    Replace the thermostat?

    Graham Wallis

  3. #3
    pur-john, not pew-john! peujohn's Avatar
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    Quote Originally Posted by GRAHAM WALLIS
    Replace the thermostat?
    You think the thermostat is no good? I thought of that, but figured that it would still be opening at the same temperature as with the old radiator. I'll have a look at it.

    John
    John W

    1979 Peugeot 504 GTI 2.2 litre 5 speed - 72 kW at the wheels

    1974 Peugeot 504 TI
    - now on the road

    2009 Peugeot 407 HDI wagon - family car

    Previous: 2005 407 HDI manual sedan, 1980 504 GL, 1990 405 Mi16, 1977 504 GL Special, 1984 505 SRD Turbo



  4. #4
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    Quote Originally Posted by peujohn
    You think the thermostat is no good? I thought of that, but figured that it would still be opening at the same temperature as with the old radiator. I'll have a look at it.

    John
    If the thermostat is no good it may be always open causing the car to run cold. Wth the old radiator the blocked flow would have been doing the thermostats job.

    Graham Wallis

  5. #5
    pur-john, not pew-john! peujohn's Avatar
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    Makes sense. Thank you sir.
    John W

    1979 Peugeot 504 GTI 2.2 litre 5 speed - 72 kW at the wheels

    1974 Peugeot 504 TI
    - now on the road

    2009 Peugeot 407 HDI wagon - family car

    Previous: 2005 407 HDI manual sedan, 1980 504 GL, 1990 405 Mi16, 1977 504 GL Special, 1984 505 SRD Turbo



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