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    VWVortex


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    Thread: Coolant question?

    1. Member Scirocco16's Avatar
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      '87 Scirocco 16V
      10-04-2012 07:05 PM #1
      I just got some blue g11 coolant planning to flush and replace it. Now I'm wondering if I should have gotten the pink g12 instead? The car has green coolant in it now, will the residue react with the new g11 at all? Do I need to take special precautions when flushing it? They say its not good to mix g11 and g12.

    2. Senior Member Chris16vRocco's Avatar
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      Swedish Meatbrick
      10-04-2012 07:07 PM #2
      Make sure you flush it thoroughly and you'll be fine.
      Deal with it.
      80 Scirocco|87 Scirocco 16v|74 Land Cruiser|84 230CE|91 164L|86 740GLE td
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    3. Member Scirocco16's Avatar
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      '87 Scirocco 16V
      10-05-2012 09:15 AM #3
      ok, thanks! is the flush procedure in the bentley?

    4. Member Scirocco16's Avatar
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      '87 Scirocco 16V
      10-07-2012 05:47 PM #4
      Why is there no DIY for flushing the coolant on a 16v? I guess it's just common knowledge? I've heard about the "air in the system overheating" problems, and seen a few short replies about how to burp it out, but I'd really like some complete instructions about how to get things completely flushed out and properly filled so there's no issues. Call me a noob, but I'm 17, and I haven't had a huge amount of experience, but I can usually figure things out ok with a decent explanation.

    5. Member rabbitnothopper's Avatar
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      10-08-2012 12:07 AM #5
      flush a coolant system:

      two options

      #2, pressure flush using a high pressure system while the engine is running
      shops tend to do this
      however it can inadvertently blow your headgasket if used improperly.

      #1 driveway flush
      USING DISTILLED WATER (.89cents/gallon)
      drain and collect the old coolant
      refill with distilled water
      run engine Open the Heater valve on the AC
      run engine until radiator fan kicks on twice
      shut off engine and allow to cool (30-60 minutes)
      drain water/coolant mix
      using Pensoil Radiator Flush (small yellow bottle)
      pour in flush treatment, fill with distilled water
      Run engine until warm again
      allow to cool
      drain flush treatment
      refill with Distilled Water
      run engine until warm
      shut off and drain
      refill with Distilled water but dont run it this time
      drain it then refill with 50/50 mix of your Coolant

      DONE.

      DISTILLED WATER does not contain metal particles that Tap/Garden hose water contains
      these metal particles CAN and WILL rust out your coolant passages over time

    6. Member Scirocco16's Avatar
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      10-08-2012 12:15 AM #6
      Hey thanks for the info! I got som lubro moly rad cleaner that should work in place of the Pennzoil rad flush. I'm gonna install a new overflow tank, level sensor, and heater valve; guess I should do that in between flushes sometime. Should I fill it through the tank and drain it through one of the lower hoses?

    7. Member Scirocco16's Avatar
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      '87 Scirocco 16V
      10-08-2012 08:29 PM #7
      do I have to remove the t-stat to drain the block???

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