gisdsuho said:
I'm not too thrilled with Dex-cool, had a '96 Blazer, 24,000 heater core plugged up, 70,000 needed radiator, Dealer flushed system and put in a new radiator, and old style"green" coolant..
whats that tell you.
That model was very prone to failures with Dex, most say that the fact the reservoir was not sealed (by design, not by the owner) on the Blazer/Jimmy was to blame.
SOME DEX-COOL INFORMATION
Dex-Cool is an Ethylene Glycol based high performance coolant that contains unique corrosion inhibitors, which are different from anything else on the market. Dex-Cool is vastly superior to conventional coolants, which use silicates, phosphates, borates, nitrites, nitrates, and amine additives to eliminate corrosion. These additives are abrasive to water pump seals, and silicates are especially unstable and drop out of solution and form a gel after time. All of these conventional inhibitors deplete after a short time, which is why conventional coolant must be changed every year.
The unique corrosion inhibitor technology in Dex-Cool is based on the use of two organic acids, which are synergistic and combine to form carboxylates. Texaco refers to this as Organic Acid Technology (OAT), or Carboxylate Technology. The corrosion inhibitors used in Dex-Cool deplete very slowly thus eliminating the need for traditional additives, or frequent change intervals.
Note that Dex-Cool differs from conventional coolants only in the additive package, not in the Ethylene Glycol base, meaning it provides the same anti-freeze and boil over protection as conventional high performance coolants, but also provides superior corrosion protection to all cooling system metals.