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Thread: Bleeding The Coolant...?

  1. #1
    Regular Member Jezzy's Avatar
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    Default Bleeding The Coolant...?

    Is this how you do it?

    1) Remove cap from coolant expansion tank

    2) Pour in coolant/water mix until it reaches the level mark

    3) With coolant tank cap still off, start the engine and run it for a while

    4) Get the engine hot enough for the thermostat to open (and if you have the 2.0T open the bleed valve on the coolant hose until water starts coming out)

    5) Turn engine off, top up coolant to bring it back to the correct level, refit cap


    Presumably there's no danger of coolant shooting out of the expansion tank whilst the cap is off?

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    I toolk the lower rad hose off to drain mine.

    Then I filled to the level on the header tank. Then I ran it up to temp with the cap on. As soon as you see the level drop in the expansion tank, turn it off. Let it cool for a while and remove the cap and top up to level again.

    Check the level after the next jorney nd top up if necessary.

    Thats what i did.

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    Regular Member Jezzy's Avatar
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    Quote Originally Posted by mucklestone View Post
    I toolk the lower rad hose off to drain mine.

    Then I filled to the level on the header tank. Then I ran it up to temp with the cap on. As soon as you see the level drop in the expansion tank, turn it off. Let it cool for a while and remove the cap and top up to level again.

    Check the level after the next jorney nd top up if necessary.

    Thats what i did.
    Where does the air exit then, if the cap's on?

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    Regular Member marktaylor's Avatar
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    through the cap , most exspansion tank caps have pressure relief valves built in to stop tthe system exploding if the pressure was to build up

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    Regular Member macdad's Avatar
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    Also remove the right hand hose in bulk head which goes to heater matrix,start to fill system at expansion tank...when you see coolant start to trickle from outlet,quickly replace pipe...this stops air locks in the heater matrix.

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