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Old 02-22-2013, 01:15 PM
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Default Coolant Question

So my coolant was low around November so I went and bought a bottle of G12 from volkswagen. Are we supposed to dilute our coolants before we put em in the reservoir? Beca use I just straight up just poured from the bottle up to the line. I didn't do any sort of 50/50 mix with distilled water. Not sure if G12 from the dealership is pre-diluted or not.
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Old 02-22-2013, 01:28 PM
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it is not prediluted.

(borrowed content)
Remember to check the concentration (pH) of your Vw coolant on a regular basis. It's especially important to maintain the correct Vw coolant concentration during winter to protect your system against freezing temperatures. If your coolant concentration is weak, change it. Over time, weak or contaminated coolant (incorrect pH) can cause serious engine problems (i.e. water pump failure, as mentioned above). It's also important to note that approved Vw coolant comes in concentrated form. You MUST dilute the coolant using DISTILLED water to a 50/50 concentration. DO NOT mix normal tap water with coolant. Tap water varies in pH, mineral, and chemical content and can adversely affect your new coolant and cooling system.
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Old 02-24-2013, 02:41 PM
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Crap, I knew it. Alright thanks for the info, going to do a coolant flush very soon and do a mix this time.
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Old 02-24-2013, 02:50 PM
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Mine is straight g12. Been like that since I changed my rad. Never had any issues.
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Old 02-24-2013, 10:55 PM
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haha furbar.
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Old 02-25-2013, 09:47 AM
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Fubar is just hardcore like that.
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Old 02-25-2013, 10:29 AM
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No just didn't know any better. Probably drain some and add distelled water this spring. Its been fine for 2 winters though.
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Old 02-25-2013, 11:53 AM
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pick up a cheap coolant tester at walmart / autozone etc.

it tells you what the boiling point is.. and what the freezing point is.
you stick the hose in the bottle.. squeeze the pump.. the coolant goes into the gauge.. the needle points on one side to freezing temp other side to boiling. simple as that..

that way.. you know its rated for cold enough to like -20 etc. or whatever you need in your area (you know how cold it gets at its coldest) same with boiling..

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Old 02-25-2013, 08:51 PM
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i run g12 + in my fathers tdi golf and in my moms tdi passat. in the gti is just regular pink g12.
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Old 02-26-2013, 02:17 PM
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I just alternate on topups. I'll use straight G12 once and then water the next time. I keep both in my trunk. Unless you were filling up from dead empty, filling the reservoir with some straight G12 isn't a big issue. Draining isn't really necessary, IMO.

Also, I think, depending on where you live, weather, etc. You can run up to a 70/30 mix coolant/water. I really wouldn't worry about it.
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