navigator said:isn't some of the new antifreeze safe for any vehicles?
If I was concerned I would take it back and have the dealer fix it.
RayVoy said:GM also claims that the Dexcool problems reported, are due to owner neglect. Apparently, the "orange stuff" works within spec so long as the Customer ensures the pressure inside the system is maintained. If the owner allows the pressure to fall, due to a leak, or a failing pressure cap, Dexcool can self contaminate (I haven't figured out what this means).
Bartonmd said:So, so much misinformation about this issue, out there...
The "all makes, all models" (AMAM) stuff is fine to mix with Dexcool, and also keeps its long life rating. If you switch to the "can't hardly find it any more" silicate green stuff, it is an every 2 year deal. If the dealership says different than the bottle of coolant, and your engine is destroyed, have them put it in writing (they won't, because it's an excuse) that it was the coolant, and take that to Prestone, and have their lawyers fight over which one is right...
Dexcool, as well as the AMAM stuff don't hold onto water as well as the silicate green stuff did, so they lose level over time as the water evaporates out of them. It is normally the customer's fault for not checking this, and letting it happen. When the level gets low, and there is air in the system, the system can't pressurize fully, and gets contaminated. When it gets contaminated, it loses its dielectric properties, and the different metals actually eat each other and the gasket in between via dielectric corrosion from the dissimilar materials with fluid in between them.
There are different ways that the different coolants keep the systems clean. The old green stuff made for copper radiators and iron blocks/heads actually had very small silicate (sand) particles in it, which would basically sand-blast everything clean. When we went to aluminum radiators, aluminum heads, plastic intakes, etc. the silicate coolant would basically sand-blast away the material (including the newer gaskets and water pump seals that aren't made for it). The Dexcool and AMAM stuff use chemicals to keep the passages and everything clear.
The issues with the early Dexcool engines, along with the people letting level get low, was that the gaskets were more succeptable to dielectric corrosion, as well as not having the elasticity for the many mechanical cycles of differential expansion. GM has since come out with new "stretchy" bolts and better gaskets to correct the issue on these older engines, as well.
Vonhendon said:because the coolant in my radiator is green and the stealership put it in there. aka NON-GM ANIFREEZE.
vipergg said:Dexcool is really more pink isnt it ?
kardain said:Here is a good example of the color and a not so good example of a computer water cooling set up... One of these days I'll tidy it up.
In the reservoir, it's more on the orange side. In motion, it's more pinkish.... 4:1 water to dexcool mix is what I run.
fishguy1123 said:So is that why the res gets low after a month or so with dexcool/amam? Assumeing no leaks are present in the system.
RayVoy said:Maybe having the "green stuff" in the rad is not a bad thing.
I, and many thousands of others, have had leaking manifold gaskets caused directly, or indirectly, by Dexcool.
Mine occurred a few months after I had the original Dexcool flushed and the system refilled. I too, discovered it had been filled with the "green stuff".
Did the gasket die because of the flush, because of the original Dexcool, because of the change to "green stuff"? I don't know, and the jury is still out.
And, I don't have a recommendation for what to do, maybe the 50,000/5 year (this might be wrong, I didn't look it up) duration is too long, maybe it needs to be changed every two years, I just don't know.
Google Dexcool, you'll discover many links to problems and, many links to litigation.
Haha, and I just found out (from reading this thread), that the new "green" is "yellow".Vonhendon said:Okay I found out my mine is green, 3yrs. ago I took it to a shop to get a flush&fill and they told me about all the problems with (Death Cool ) and lawsuits so they cleaned all that out and put the green stuff in.