JHZR2
Staff member
In my fleet of cars I run a variety of coolants. It’s ok, finding the ”best” and/or running OEM is part of the fun. So I keep Dexcool, G-48, G-05, JD Cool Gard II, and…. ?
In my 445k mile Ram Cummins, I took it over to cool Gard and it’s great. My 265k mile Cummins has automotive green, and I’m thinking that perhaps I could do better. First thought is JD cool Gard II… but I’m also looking at the Cummins fleet guard line. And then I saw peak final charge at WM, and it has the Cummins approval…. So options… they’re a great thing.
here’s the issue… I think my truck has the original heater core, and I think it’s a soldered brass type…. My understanding is that these trucks came with plain green automotive coolant back in the day… but that was 96, now its 2022… the Chrysler green of back then may be somewhat different from say, zerex green today…. So might as well make a better informed decision on modern coolant…
I know @Chris142 has talked about dexcool eating solder in repaired brass radiators. My understanding is that silicate is a best bet, but some other compounds may also help. It seems like from my reading, that it is the 2-EHA that attacks the solder primarily.
JD cool Gard being a HOAT with apparently very good solder protection seems like the obvious choice. This document is pretty detailed:
But I’d like to understand what compounds must be avoided to protect a soldered brass heater core... Besides 2-EHA. And what Hd type OAT coolants, if any, can be trusted around brass and solder…
thanks!
In my 445k mile Ram Cummins, I took it over to cool Gard and it’s great. My 265k mile Cummins has automotive green, and I’m thinking that perhaps I could do better. First thought is JD cool Gard II… but I’m also looking at the Cummins fleet guard line. And then I saw peak final charge at WM, and it has the Cummins approval…. So options… they’re a great thing.
here’s the issue… I think my truck has the original heater core, and I think it’s a soldered brass type…. My understanding is that these trucks came with plain green automotive coolant back in the day… but that was 96, now its 2022… the Chrysler green of back then may be somewhat different from say, zerex green today…. So might as well make a better informed decision on modern coolant…
I know @Chris142 has talked about dexcool eating solder in repaired brass radiators. My understanding is that silicate is a best bet, but some other compounds may also help. It seems like from my reading, that it is the 2-EHA that attacks the solder primarily.
JD cool Gard being a HOAT with apparently very good solder protection seems like the obvious choice. This document is pretty detailed:
But I’d like to understand what compounds must be avoided to protect a soldered brass heater core... Besides 2-EHA. And what Hd type OAT coolants, if any, can be trusted around brass and solder…
thanks!
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