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Thread: Watched wheelers dealers...

  1. #1
    Regular Member SlowCoach's Avatar
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    Default Watched wheelers dealers...

    Been watching wheelers dealers and on this part replacing cooling radiator, he was ensuring radiator air was removed... I started to realise, car radiators is alike home radiator...

    Wheres the air bleed valve for vectras?? Lol

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    Moderator & Events Assistant paulhb's Avatar
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    It's called the expansion tank the high point in the system and is an auto bleed device

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    On your house radiator the flow and return pipes are at the bottom so air can sit at the top(the highest point), on the Vec it cant and always returns to the header. If you go to a large commercial building you may well find that the flow and return pipes on radiators are at the top, this saves someone having to bleed 300 radiators.
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    Quote Originally Posted by Humourbash View Post
    car radiators is alike home radiator...
    No, they used to be before the addition of the header tank where any air now ends up. See Paulhb's reply.

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    Regular Member john norris's Avatar
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    Quote Originally Posted by Das View Post
    On your house radiator the flow and return pipes are at the bottom so air can sit at the top(the highest point), on the Vec it cant and always returns to the header. If you go to a large commercial building you may well find that the flow and return pipes on radiators are at the top, this saves someone having to bleed 300 radiators.
    our house ones are at the top, still have to blead the damn things though

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    Regular Member SlowCoach's Avatar
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    Weird cos i'm a plumber, water inlet at bottom and outlet at bottom still need to bleed rads, same for cooler rad on car both bottom. Surely it should be a bleed valve as air stays at top making it work less effect?

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    Quote Originally Posted by Humourbash View Post
    Weird cos i'm a plumber, water inlet at bottom and outlet at bottom still need to bleed rads, same for cooler rad on car both bottom. Surely it should be a bleed valve as air stays at top making it work less effect?
    On mine the flow pipe is at the top and the return is at the bottom. I can see where you are coming from right enough.
    "We are not some sort of dictatorship!"


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    Moderator & Events Assistant paulhb's Avatar
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    Quote Originally Posted by Humourbash View Post
    Weird cos i'm a plumber, water inlet at bottom and outlet at bottom still need to bleed rads, same for cooler rad on car both bottom. Surely it should be a bleed valve as air stays at top making it work less effect?
    However how many radiators have a connection from the top corner of them to the expansion tank just like the vectra allowing air trapped at the top to escape to a higher point in the system namely the expansion tank

  9. #9
    Regular Member SlowCoach's Avatar
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    Of course!!! Remember now theres one pipe there. Cheers paul. :-D

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    From memory, a car heater system is high pressurised, whereas a home system is not (pump driven only)

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