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Thread: 300tdi expansion tank overflow

  1. 21st November 2009, 11:08 AM #1
    disco_mitch's Avatar
    disco_mitch
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    300tdi expansion tank overflow

    just popped the bonnet to do my weekly check and noticed that the expansion tank has had an overflow it is still full but there is red coolant runs all around it would it just be from all the heat we have had
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  2. 21st November 2009, 11:54 AM #2
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    4bee
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    If it is level with the Internal Indicator Post (look through filler hole) then that should be sufficient. If more than that, then it would probably overfill when hot.
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  3. 21st November 2009, 09:32 PM #3
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    yea the level is right, but i only just noticed that it has overflowed would this indicate that it overheated
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  4. 21st November 2009, 10:32 PM #4
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    Coolant

    I notice that coolants are now coloured red and green.My mates Tojo Corolla's handbook says to use red coolant.My D1 handbook just says 50/50 and mine came with green and have always used green.Is there a difference in properties between colours?
    John ( disco 44 )
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  5. 21st November 2009, 10:49 PM #5
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    Yep sure is a difference, don't mix the two. The green is the glycol coolant (uses neutralised inorganic acids)and the red is the newer OAT coolant(Organic Acid Technology).
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  6. 22nd November 2009, 08:25 AM #6
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    mine used to have the green stuff till i put it in for a service and he changed it to red said they arent supposed to run green which is why the heater cores corrode
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  7. 2nd December 2009, 06:16 AM #7
    dirtdawg
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    may also be a buggerd cap, when they die they stop sealing when at temp and will let the water out of the cap a new cap is about $10
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  8. 2nd December 2009, 08:38 PM #8
    It'sNotWorthComplaining! Guest
    A not properly tightened cap will cause coolant loss when hot.
    Worse though is the old Black tanks that start to leak at the seams and then go pop when you least want it to.
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