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Thread: Polo AXR 1.9TDI - Coolant leak from temp sensor

  1. #1
    Join Date
    Nov 2021
    Location
    Brisbane
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    2

    Polo AXR 1.9TDI - Coolant leak from temp sensor

    Hey guys,

    Recently bought myself a little 1.9TDI polo. Super tidy thing, but as soon as I drove it for the first time the coolant warning light came on - after investigation, whatever muppet worked on the car previously put the temp sensor o-ring on the wrong side of the copper section. As a result, coolant was just dripping from the temp sensor.

    Managed to take it out, put the o-ring on correctly and reinstall, but lost a heap of coolant in the process.

    With that said, what do you guys recommend I use just to top up with coolant until I get the full tbelt/water pump done (it is due anyway)?

    Further to that, are there any recommended euro specialised mobile mechanics in the North Brisbane area? Simply because I may just leave it as is and get someone to do the job properly, without worrying about putting in the wrong coolant until I can book in with a mechanic.

    Cheers,

    Josh

  2. #2
    Join Date
    Feb 2011
    Location
    Newcastle
    Posts
    5,758
    Users Country Flag
    Not exactly north Brisbane, but Alba European always gets recommended in Brisbane. They are in Moorooka. Might be worth the drive to get a good mechanic: Log in to Facebook

    As for your coolant, I would just top it up for now and check it a few times over the next week or two. Then get it flushed properly once you book it in to get the water pump and timing belt done.
    2017 Ford Fiesta ST
    2015 Audi SQ5 bi-turbo V6 TDI family hauler

  3. #3
    Join Date
    Oct 2010
    Location
    Melbourne, VIC
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    3,178
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    Just get some premixed G12 or higher grade coolant to top up your reservoir. Otherwise you need to buy RO or distilled water to dilute the concentrate.

    Do not use any other coolant if you're going to be running for any meaningful period to avoid corrosion.
    Resident grumpy old fart
    VW - Metallic Paint, Radial Tyres, Laminated Windscreen, Electric Windows, VW Alloy Wheels, Variable Geometry Exhaust Driven Supercharger, Direct Unit Fuel Injection, Adiabatic Ignition, MacPherson Struts front, Torsion Beam rear, Coil Springs, Hydraulic Dampers, Front Anti-Roll Bar, Disc Brakes, Bosch ECU, ABS

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