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  1. #1
    VXRed silverswish's Avatar
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    14th August 2012
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    Angry Coolant/Overheating Issue

    Hi all,

    So my car has been overheating lately, each time the coolant bottle loses all coolant and is empty.

    No white mayo under oil cap
    No obvious leaks under car
    Only losing coolant under pressure, when engine is running

    So my question to you is, where on earth is my coolant going?
    Star Silver Astra VXR (2006) - Black 19" alloys

  2. #2
    VXR Adam"san" w20adm's Avatar
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    23rd June 2010
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    Could be leaking by the water pump
    Could be leaks in the radiator
    Could be a leak in the turbo water line.

    Check these areas. I happened to have 3 leaks all at once, the radiator, the turbo line and the line by the water pump
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  3. #3
    VXR Nothing comes close vr55vxr's Avatar
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    6th February 2008
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    Get a pressure test done on the cooling system, you will see where the water is escaping.

  4. #4
    VXR Adam"san" w20adm's Avatar
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    If its only leaking under pressure i'd definitely be looking at water pump. I know it's a different car but our mk7 fiesta had a really annoying leak which only occurred after a drive when it had all been pressured up, couldn't find any drips from any of the pipes. Turned out the water pump was goosed.
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  5. #5
    VXR enough
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    3rd May 2015
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    If the cap has ever been over tightened it damages the inner cap seal and can cause head gasket faliure.
    Full 3" Piper turbo back, Airtec fmic, piper x cone, Dap r springs, tarrox g88 discs, EBC yellow pads, powerflex engine/gearbox inserts + rearbeam bushes, whiteline lower arms, vredstein ultrac vortis,courtnay retainers, turbosmart actuator + recirc. Courtnay sport stage 3 mapped.

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