jwynnejr1
Senior Member
- Joined
- Jul 28, 2019
- Posts
- 104
- Reaction score
- 35
- Location
- Mississippi
- Ram Year
- 2018
- Engine
- 6.7 Cummins
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Flush, Clean and refill, if in doubt.
Tutorial here:
https://www.ramforum.com/threads/ram-5-7hemi-coolant-flush-diy.116399/#post-1673088
I'm guessing, due to its age, that there is no cracked head or engine gaskets allowing oil or other contaminants into the radiator fluid.
More likely, someone, has mixed fluids and now they combined fluid is breaking down.
Based on where you live, it could also just flat out be used up, from doing its job of keeping your engine cool in the Mississippi heat.
regardless, I would suggest a Flush, Clean and refill.
then add RMI-25 to anti-freeze.
Bottom line, it's contaminants or corrosion.
I'm going with just plain old used fluid corrosion and that brown gunk will turn into a scale, if left alone, and coat everything and lead to other issues.
Looks pretty good, for its age and area but would still clean it out.
Like your shorts, occasional change will make everything better.
Failure to do so will result in more Brown markings.
EDIT:
If yo do not plan on keeping the truck, long term and well over a 100K miles AND could care less about the next guy, then let it go. Doubt you will ever notice any issues from it.
Thanks. I’ll change it. Regardless of whether I plan to keep it or pass it on, it’ll be taken care of while I have it. [emoji1307]
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Brown is not good.
Flush or multiply changes.
Sent while firmly grasping my redline lubed RAM [emoji231]
I drew some antifreeze out of the reservoir today. The antifreeze looks okay, but there are some particles of gunk suspended in it. I think a flush is definitely due.
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Like the other fella said, rmi-25 it. You just add it now, and over the next 500 miles, it takes particles and traps them in over flow, you wet vac it out. Works like a top. Then you could flush or not. If I had to guess, some new trucks get stop leak added to them, and your was one of them. Way too early for this.
Mine is 8 ounces, your's may be 16, how many gallons is your system?
COOLING SYSTEM CAPACITY RMI-25 DOSAGE
4 Gallons 8 oz.
5 Gallons 8 oz.
6 Gallons 12 oz.
8 Gallons 16 oz.
I usually put it in radiator, drain some off the petcock and let sit a minute then add, I'm not sure how that over flo works if coolant is always in and out of that.
Like the other fella said, rmi-25 it. You just add it now, and over the next 500 miles, it takes particles and traps them in over flow, you wet vac it out. Works like a top. Then you could flush or not. If I had to guess, some new trucks get stop leak added to them, and your was one of them. Way too early for this.
Other Fella.
Other Fella?
Jeesh.
More Like Ram forum God ...in my own mind, at least.
Will that stuff work if I put it in the reservoir? My radiator doesn’t have a cap like the old style does for whatever dumb reason.
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Mine looks exactly the same— I have a 2016 6.4 with 23k miles. I have four gallons of 50/50 mix coming that I’m going to cycle through. CARiD had the 50/50 mopar for $13 and change for a gallon and after shipping and tax is worked out to $18 and change, best price I could find.
anyone know how much comes out of the radiator and coolant reservoir when I dump it? I’m not planning on draining the block in either side. I was able to drain the block on the passenger side in my old 5.7 and found dumping the 3-4 quarts on my arm and ground not worth it.