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10-18-2010
HiOriginally Posted by matt5112
"New" dex is just like "old" dex..its just called "new."
For the reasons listed above, I would flush and use a silicated coolant. G-05 and its clones (Mopar "Long Life" and Ford "Gold" ) fit that description, or just go with a real traditional green coolant....that has silicates listed clearly on the bottle.
Remember: Color means nada. Ingredients is everything.
10-21-2010
i went green in mine too , had a issue with a heater hose over spring and summer , was a small leak , lazy didnt want to change it out again (new hose had 2 pinholes in it ) so i just ran water for the spring and summer . finally got off my lazy butt and fixed the hose , but did a cooling system flush cause the water was rusty looking , btw swapped mine over to green 4 years ago when i got it just to be safe .
10-21-2010
I would never run straight water. Along with keeping your cooling system from freezing, coolant/antifreeze helps keep water from boiling. You can get the coolant hotter than 212* and still be fine.
10-22-2010
I ran pure water up until a couple weeks ago simply because I was doing a system flush over the summer. My only concern was rust and not having lubrication for the water pump seal. Other than that, I didn't see any steaming like I thought I would. I was actually surprised about that.
10-22-2010
i have heard more than once that the dex will create a very thick substance that will build up in the system. i finally got to see it first hand when i took off my intake to do gaskets. there was a thick substance almost greese like in the coolant passages on the heads. I switched to the green since it has never failed me in the past.
10-23-2010
^ TCO I agree: Water does become PUSHY at 212 deg
^ SnowDrift I agree: Never ever run just water (Lubricant for the water pump seal).
One week of 100% pure water = One YEAR of 100% pure grief.
Personally, I will never, ever run pure water ever again.
Believe who you will, then do what you must.
Crazy problems. Drove me nuts for about a year.
10-23-2010
DEX does have a tendency to gum up. I have switched all of my newer model cars to the green stuff, it's been in my 98 Astro for 10+ years and I've had no problems, plus, all of the coolants say that they protect aluminum now... Absolutely wouldn't run straight water though...
10-23-2010
Okay sounds like a plan...First chance I get, I'll flush the system and go green. I was just hesitant at first because of the huge sticker on the resivour "ONLY use Dex-Cool Coolant!". I trust you guys however, so green it is
10-23-2010
My 2007 GXP has the dexcool in it and I have noticed "mud" in the over flow tank why is that , it can't be good . I want to flush it and change it to green or yellow . Is this a good idea or not.
10-23-2010
VERY good idea.
10-23-2010
dex only gunks up when its exposed to air in the system. you people are crazy.
10-23-2010
flushing it is a very good idea.
doesnt matter what you fill with as long as you keep it fresh.
10-24-2010
Hi
If you are going just by mere color, you really have no idea what you are using.
FWIW, OAT coolant seems better suited to the new all-alu engines. Cast iron seems to react badly to a beach headed dex system.
10-24-2010
Exactly. I cant believe how many people (on this site and other GM sites) that people just claim Decool will just gum up at the drop of a hat, no rhyme or reason.
Everything happens for a reason people.
10-24-2010
things are logical? Since when?
10-24-2010
I choose to switch because the other"green stuff" is less tempermental
its true that if you flush every 2 years and keep the system prperly sealed you shouldnt have issues with any coolant
BUT 50% of people think filling it with gas is proper car care
10-24-2010
I've read around GM-oriented forums that switching from Dex-Cool to "Prestone" (green stuff) will eventually cause your water pump to fail since it's not the same thing.
I found that strange but I can't deny nor believe it. Anybody has a word on this?
10-24-2010
thats a straight up lie.
10-24-2010
Thats bs
10-25-2010
That's right up there with the myth that once a person uses synthetic oil, they can never switch back to natural oil.
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