![]() SBC race engines with aluminum cylinder heads usually require extensive external plumbing to address two design problems:ġ. Street-driven vehicles seldom need auxiliary plumbing or coolant lines. If you neglect it beyond that point, you'll have the kinds of problems that TwinTurbo is describing - just like you would if you neglected any other coolant for that long. The same is true for regular PEG antifreeze, but in two years instead of five. If you monitor the pH and dissolved solids (conductivity) of the fluid as part of regular maintenance, you can get the advertised 5-year life without any problems.ĭexCool will precipitate solids in a system over time, as the service life is near it's end, so cooling system service is imperative unless you want to find an orange/brown "mud" in the recesses of the system. Plain PEG won't inhibit the water's tendency to dissolve metals as well as DexCool, so the coolant mixture can protect longer. What it DOESN'T do is leach metal ions from the system when mixed with water. After changing the second core in my '86 T/A at 33K miles, I bit the bullet and changed.ĭespite rumors to the contrary, DexCool is probably no better or worse for non-ferrous metals protection than common polyethylene-glycol based antifreeze - as long as you follow the correct service interval for either type. I use it since too many of my vehicles sit in storage for extended periods and I'm tired of changing heater cores. You have to have a tight system to use it. Another disadvantage is that if you ignore the required maintenance, you will see more deposits forming in a system with Dex-Cool. The same molecular adhesion that allows better corrosion protection and heat absorbtion properties also makes it seek out any marginal seals or openings. ![]() The disadvantages are the slightly higher cost, slightly lower availability, and the tendency of the coolant to wick through the smallest openings (like diesel fuel). I don't own a vehicle that doesn't use it, including all those made before 1996. The DexCool also has other anticorrosion and lubricating additives that make the concentrate less viscous and have a greater latent heat capacity (it absorbs, holds, and moves slightly more heat energy). The difference between the two is mainly that the Dex-Cool has no silicate additives, so deposits form more slowly. As soon as you add silicates to the mix, you need to drain it more frequently. They can be mixed without causing any adverse effects, other than that the long life properties of the Dex-Cool will be compromised so you'll have to flush every two years instead of five. ![]() DexCool will precipitate solids in a system, so cooling system service is a MUST.įrom what I've learned, the two coolants are compatible. Is that enough choices of places to get it.It may be there store brands or even prestone.Just read the FRONT labels on the jugs it will state in plain view if it is compatible with other antifreeze since gm,ford,chrylser all have used different coolants (dex cool ) type and pretty much yeah your good.I would strongly suggest flushing your system with a flush and change over to just the normal green(I use walmarts super tech antifreeze) bc it is made by prestone for walmart! Less expensive and over time dexcool has caused more problems like clogged rad,heater cores.Just my two cents.Just add some,unless ur fix is to get it by for now.I would flush it out,and if your hoses are over 4 years old replace them(recommend) by gates,goodyear and my policy and new therm,and new rad cap.Good luck sorry for the book but,have plenty of time to write it.TwinTurbo has some points. ![]() Walmarts brand supertech antifreeze is compatible with dexcool.Along with brands sold at napa,carquest,autozone, and advance auto.
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