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    Thread: use only g12 coolant?

    1. Junior Member 00vr6doyle's Avatar
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      02-24-2011 04:03 PM #1
      should i only run g12? if i dont have to im not trying to pay 28 bucks a gallon from my local vw dealership...if not what should i run?

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      02-24-2011 06:30 PM #2
      Use only g12 or g12 plus!!!!!!! Other coolants will cause pitting in your cylinder head. Buy from either ECS Tunibg or MJM Autohaus for much better prices than the stealership.
      97 jetta vr6 386,000 and no repairs to engine or tranny (original chains and tentioners). TOTALED by my brother 1/1/13
      00 jetta vr6 119,200 and no repairs yet. Both exclude reg maint. SOLD 5/1/11 for 02 allroad.

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      02-25-2011 12:25 PM #3
      OMG yes there is a reason that they say use G12 only

      My car before i had it was runing conventional coolent for most of its life and bam at about 100k Anything that was related to coolent had to be replaced. The bitchies of them all being the Heater core, Unless you fancy ripping apart your whole dash to replace your heatercore run G12
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    4. Member ricardo's Avatar
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      02-26-2011 03:23 PM #4
      replacing your heater core is going to happen anyways regardless of what coolant you use...as long as there is no mixup of coolant (geling could occur) just get a compatible coolant
      "Public transportation......because you're poor"
      done everything that's cheap....broke the most expensive parts....

      having cooling problems? check this out http://the-corrado.net/forum/viewtopic.php?f=1&t=68720

    5. Member vr6pilot's Avatar
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      02-26-2011 08:30 PM #5
      only??? Bentley sez "G12 or equivalent". Page 19-11.
      Keurig...because landfill.

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      02-26-2011 10:36 PM #6
      it really doesn't matter. the reason they say "G12 only" is because, if you MIX it with other coolants it forms a nasty brown sludge. however, if you do a complete replacement (no g12 left at all, and flush it with pure water in between) then you can run whatever you want since it won't be mixing. that being said, i use only g12 and it can be found for $9 here: http://www.germanautoparts.com/Chemicals/Coolants/Hepu

    7. Member vr6pilot's Avatar
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      02-26-2011 10:50 PM #7
      Quote Originally Posted by 206VR6 View Post
      it really doesn't matter. the reason they say "G12 only" is because, if you MIX it with other coolants it forms a nasty brown sludge. however, if you do a complete replacement (no g12 left at all, and flush it with pure water in between) then you can run whatever you want since it won't be mixing. that being said, i use only g12 and it can be found for $9 here: http://www.germanautoparts.com/Chemicals/Coolants/Hepu
      Don't you mean $22.80 plus shipping? If you want a full gallon, that is, so we can talk apples to apples.

      You're right about not mixing but that has been well-established.
      Keurig...because landfill.

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      02-27-2011 12:15 AM #8
      Quote Originally Posted by vr6pilot View Post
      Don't you mean $22.80 plus shipping? If you want a full gallon, that is, so we can talk apples to apples.

      You're right about not mixing but that has been well-established.
      mm yeah good catch. i'll be honest its saturday night and im fairly drunk, i didnt really read the OP's post at all lol

    9. Member EuroSportChicago's Avatar
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      02-27-2011 11:10 PM #9
      IF you don't wanna buy the G12 just buy a honda
      Quote Originally Posted by aphythiate View Post
      I don't understand what you said. I'm guessing you did a "dump'n'go" minus the go.
      Quote Originally Posted by RayMkIIIvdub View Post
      where are the muffler bearings and is that something i can change myself

    10. Member vr6pilot's Avatar
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      02-27-2011 11:42 PM #10
      Or I could buy a mk3, yeh? Cheap as dirt since the resale value is practically non-existent and I can use the G11 that the brilliant German engineers came up with......and then abandoned. Thanks for your contribution.
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    11. Member Bryan127's Avatar
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      03-03-2011 11:36 AM #11
      You can regualr coolant as long as COMPLETELY flush out the system. I ran Prestone in my Jetta with regular flushes for 3 years with no problems...an no pitting of my cyl. head G12 is more corrosion resistant though...all depends on how often you want to flush/fill.

    12. Member vr6pilot's Avatar
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      03-03-2011 12:16 PM #12
      Curious...do you mean you ran regular old school Prestone or the "Extended Life, All Makes ~ All Models" Prestone?

      note...they are both the same yellow/green color.
      Keurig...because landfill.

    13. Member Bryan127's Avatar
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      03-03-2011 12:22 PM #13
      just the standard Prestone...the cheapest they sell

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      03-03-2011 12:45 PM #14
      Google "vr6 head pitting" and you will find out why VW developed g12.
      97 jetta vr6 386,000 and no repairs to engine or tranny (original chains and tentioners). TOTALED by my brother 1/1/13
      00 jetta vr6 119,200 and no repairs yet. Both exclude reg maint. SOLD 5/1/11 for 02 allroad.

    15. Member SVTDanny's Avatar
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      03-03-2011 01:16 PM #15
      Lots of doomsday advice floats around here on VW/German fluids...... what, are VW heads made out of some uber-aluminum compound that no other manufacturer can get their hands on? VW seals are withered in days when used with non- German lubricants?

      Run whatever coolant you want, as long as you aren't mixing. That's when you get problems.


      Quote Originally Posted by jettavr681 View Post
      Google "vr6 head pitting" and you will find out why VW developed g12.


      I see 5 (five) results mentioning pitting. Image search turns up nothing. VW developed G12 coolant for 5 people?

    16. Member EuroSportChicago's Avatar
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      03-03-2011 05:26 PM #16
      Quote Originally Posted by vr6pilot View Post
      Or I could buy a mk3, yeh? Cheap as dirt since the resale value is practically non-existent and I can use the G11 that the brilliant German engineers came up with......and then abandoned. Thanks for your contribution.
      Or we could just stick to what works best.


      Thanks for the contribution.
      Quote Originally Posted by aphythiate View Post
      I don't understand what you said. I'm guessing you did a "dump'n'go" minus the go.
      Quote Originally Posted by RayMkIIIvdub View Post
      where are the muffler bearings and is that something i can change myself

    17. Member vr6pilot's Avatar
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      03-03-2011 08:29 PM #17
      You don't know if/why it works best. You continue to speak from the anus and contribute nil.

      You suggest that a VW is a high-end, premium automobile and should therefore receive only the most lavish care products money can buy. I, on the other hand, dispute such claim because your Mk3 values at $2,965 Kelley Blue Book value (excellent condition, VR6, Leather). Yeah, that's kinda dumb.
      Keurig...because landfill.

    18. Member Das Borgen's Avatar
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      03-04-2011 08:06 AM #18
      Quote Originally Posted by 00vr6doyle View Post
      should i only run g12? if i dont have to im not trying to pay 28 bucks a gallon from my local vw dealership...if not what should i run?
      what you're failing to recognize is that it's not that much more expensive than any other coolant you can get from autozone or whatnot.
      you pay that 28 bucks and you get 100% pure coolant. t 10-15bucks coolant from any auto parts place will be 50%coolant50%water mix. Addindg the fact that distilled water is around 80cents per gallon, you pay pretty much exactly the same price effectively

      What should be important to note is that G12 or G12+ is what VW specs because the stuff is low phosphate. Any non-phosphate coolant will work fine. phosphates do nasty stuff to aluminum components.

      FWIW, in my VR6, I ran BMW coolant because the dealer had that stuff at 21 bucks per gallon....100%pure coolant
      Quote Originally Posted by Das Borgen
      VR6s should sound like Chewbacca getting raped
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    19. Member ricardo's Avatar
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      03-04-2011 01:22 PM #19
      Quote Originally Posted by jettavr681 View Post
      Google "vr6 head pitting" and you will find out why VW developed g12.

      yes VW found out that their G11 formula caused pitting so they change it to G12
      "Public transportation......because you're poor"
      done everything that's cheap....broke the most expensive parts....

      having cooling problems? check this out http://the-corrado.net/forum/viewtopic.php?f=1&t=68720

    20. Member vr6pilot's Avatar
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      03-04-2011 11:40 PM #20
      Quote Originally Posted by Das Borgen View Post
      10-15bucks coolant from any auto parts place will be 50%coolant50%water mix.
      Wrong. Prestone comes in your choice of premixed or straight. One gallon of straight is $10. Therefore, the distilled water factor is moot because you'll use the same amount and pay the same amount for it regardless of coolant used.

      I don't care how you slice it, the green stuff is cheaper by at least half and far more readily available than G12. Neither of which, by the way, are low-phosphate...they are no-phosphate. (referring to extended life Prestone).

      The truth will set you free.
      Keurig...because landfill.

    21. Member EuroSportChicago's Avatar
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      03-05-2011 03:54 PM #21
      Quote Originally Posted by vr6pilot View Post
      You don't know if/why it works best. You continue to speak from the anus and contribute nil.

      You suggest that a VW is a high-end, premium automobile and should therefore receive only the most lavish care products money can buy. I, on the other hand, dispute such claim because your Mk3 values at $2,965 Kelley Blue Book value (excellent condition, VR6, Leather). Yeah, that's kinda dumb.
      So If I buy a 70k BMW 7 series and 8 years later when the kbb is 5000, I should just stop taking care of it and put shi**y parts in it? that makes sense. If it required G12 when it came out in 1997, it requires it now as well.

      I don't know the chemistry and the reactions of the chemicals that are used in G12, which you probably do not know. I Do know that different chemicals are used in different types of coolants.

      Wrong chemicals = Bad
      Correct chemicals = Good

      That is why you put it in.
      Quote Originally Posted by aphythiate View Post
      I don't understand what you said. I'm guessing you did a "dump'n'go" minus the go.
      Quote Originally Posted by RayMkIIIvdub View Post
      where are the muffler bearings and is that something i can change myself

    22. Member vortexpert.'s Avatar
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      03-05-2011 05:37 PM #22
      what caused this?

    23. Member vortexpert.'s Avatar
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      03-05-2011 05:44 PM #23
      also...
      there is a VW technical bulletin (19-10-03) that goes over coolant, identifying and mixing. good bathroom material....

    24. Member vr6pilot's Avatar
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      03-05-2011 09:42 PM #24
      [QUOTE=EuroSportChicago;70342375]If it required G12 when it came out in 1997, it requires it now as well.

      QUOTE]

      If it required G11 you still gonna run that?

      Bottom line is any OAT based coolant that is both phosphate and silicate free can be run in these engines. You just have to paint your face black and white and shake 3 chicken bones while dancing around a fire sprinkling nutmeg.
      Keurig...because landfill.

    25. Member EuroSportChicago's Avatar
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      03-06-2011 03:32 AM #25
      [QUOTE=vr6pilot;70346501]
      Quote Originally Posted by EuroSportChicago View Post
      If it required G12 when it came out in 1997, it requires it now as well.

      QUOTE]

      If it required G11 you still gonna run that?

      Bottom line is any OAT based coolant that is both phosphate and silicate free can be run in these engines. You just have to paint your face black and white and shake 3 chicken bones while dancing around a fire sprinkling nutmeg.
      I just said that I don't know the exact reasons that make G11 G11 and G12 G12. I just know that your supposed to put the type of coolant in the car that the manufacturer specifies. If it ain't broke, don't fix it.
      Quote Originally Posted by aphythiate View Post
      I don't understand what you said. I'm guessing you did a "dump'n'go" minus the go.
      Quote Originally Posted by RayMkIIIvdub View Post
      where are the muffler bearings and is that something i can change myself

    26. Member ricardo's Avatar
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      03-06-2011 05:03 AM #26
      [QUOTE=EuroSportChicago;70349697]
      Quote Originally Posted by vr6pilot View Post

      I just said that I don't know the exact reasons that make G11 G11 and G12 G12. .
      "Public transportation......because you're poor"
      done everything that's cheap....broke the most expensive parts....

      having cooling problems? check this out http://the-corrado.net/forum/viewtopic.php?f=1&t=68720

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      03-06-2011 02:58 PM #27
      i live in NH and the local napa auto here sells pentosin g12 concentrate coolant for $12.64. 1.5 liters which makes 3 liters.

    28. Member vr6pilot's Avatar
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      03-06-2011 05:58 PM #28
      that's $32/gallon.

      I just know that your supposed to put the type of coolant in the car that the manufacturer specifies
      You know the manufacturer ain't down with chips, cams, and cold air intakes yet we, as owners, do these things for our own individual reasons. The OP was looking to save some coin on the expensive VW coolant for his own individual reasons. I say, and take it for what it's worth, that the Prestone 5/150 All Makes, All Models stuff is, as far as I can tell, an equivalent product that may be had at WalMart for $10 per gallon, undiluted.

      And for the 500th time: don't mix coolants, and only blend with distilled water. There are very good reasons for both of these points.
      Keurig...because landfill.

    29. Member EuroSportChicago's Avatar
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      03-06-2011 06:35 PM #29
      Quote Originally Posted by vr6pilot View Post
      that's $32/gallon.



      You know the manufacturer ain't down with chips, cams, and cold air intakes yet we, as owners, do these things for our own individual reasons. The OP was looking to save some coin on the expensive VW coolant for his own individual reasons. I say, and take it for what it's worth, that the Prestone 5/150 All Makes, All Models stuff is, as far as I can tell, an equivalent product that may be had at WalMart for $10 per gallon, undiluted.

      And for the 500th time: don't mix coolants, and only blend with distilled water. There are very good reasons for both of these points.
      The OP can put what ever he wants in his car.

      I'm saying that its not sound logic to say just because a car is a cheap a$$ Mk3 that it should require a different type of coolant than when it was a brand new MK3. Unless there were service bulletin that stated something else was recommended, then it recommends the SAME THING. Regardless of age, condition, color or anything else your trying to argue.
      Quote Originally Posted by aphythiate View Post
      I don't understand what you said. I'm guessing you did a "dump'n'go" minus the go.
      Quote Originally Posted by RayMkIIIvdub View Post
      where are the muffler bearings and is that something i can change myself

    30. Member vr6pilot's Avatar
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      03-06-2011 09:49 PM #30
      Quote Originally Posted by EuroSportChicago View Post
      I'm saying that its not sound logic to say just because a car is a cheap a$$ Mk3 that it should require a different type of coolant than when it was a brand new MK3. Unless there were service bulletin that stated something else was recommended, then it recommends the SAME THING. Regardless of age, condition, color or anything else your trying to argue.
      You really want to argue the hell out of this, don't you. Okay, let's go:

      Because the OP, or me, want to save a few bucks on maintenance costs you seem to think we are no longer qualified to own a VW. "...buy a Honda..." you said. And you really want to nug out who's rational here?? You wanna throw down some dumb **** like that and then challenge me when I respond in kind? Get real, playah.

      edit: I'm done here. Unsubscribed cuz the question has been answered.
      Last edited by vr6pilot; 03-06-2011 at 09:51 PM.
      Keurig...because landfill.

    31. Member SVTDanny's Avatar
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      03-08-2011 09:15 AM #31
      Quote Originally Posted by vortexpert. View Post
      what caused this?

      Never flushing the coolant.

    32. Member V-dubbulyuh's Avatar
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      03-08-2011 12:38 PM #32
      Quote Originally Posted by vortexpert. View Post
      what caused this?
      Looks like most other 12V heads. Not to agitate this pissing contest further but the vast majority of 12V cars running the stock Mk3 gasket look just like this not in my opinion only from coolant choice but due to the porosity of the cheap azz gasket the car came with. Regardless of the coolant used, if not flushed ocassionally with the older style headgasket the moisture retained will deteriorate the head.
      "OP sounds like a MKIV guy"

    33. Member EuroSportChicago's Avatar
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      03-08-2011 03:01 PM #33
      Quote Originally Posted by vr6pilot View Post
      You really want to argue the hell out of this, don't you. Okay, let's go:

      Because the OP, or me, want to save a few bucks on maintenance costs you seem to think we are no longer qualified to own a VW. "...buy a Honda..." you said. And you really want to nug out who's rational here?? You wanna throw down some dumb **** like that and then challenge me when I respond in kind? Get real, playah.

      edit: I'm done here. Unsubscribed cuz the question has been answered.
      "Playa" you got shi**y logic
      -Car requires x coolant
      -Car is 13 years old
      .: Therfore car does not require x coolant.

      Quote Originally Posted by aphythiate View Post
      I don't understand what you said. I'm guessing you did a "dump'n'go" minus the go.
      Quote Originally Posted by RayMkIIIvdub View Post
      where are the muffler bearings and is that something i can change myself

    34. Member bmxdarcy's Avatar
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      03-08-2011 08:24 PM #34



      that was 1/4"+ deep on a car with under 100K on it. I think there needs to be no further warning.

      G11/G12 ONLY

    35. Member ricardo's Avatar
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      03-10-2011 12:25 PM #35
      Quote Originally Posted by bmxdarcy View Post
      I think there needs to be no further warning.

      G11/G12 ONLY
      NO G11..... G12-G12+ or any compatible coolant
      "Public transportation......because you're poor"
      done everything that's cheap....broke the most expensive parts....

      having cooling problems? check this out http://the-corrado.net/forum/viewtopic.php?f=1&t=68720

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