Coolant problem

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jogris

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Hello guys
I have a 2016. 3500 srw 4x4 with 6.4 hemi
Since it was new I have had to replace the heater core every fall because of no heat and clogged core .. this year I had to replace radiator ,, I was told by dealer that it a coolant problem and all they can do is replace heater core !!!! Are they kidding me????? 5 heater core and one radiator and it only 5 yrs old. I flush the engine and new coolant and when I had garage replace radiator they found there was lots of sediment in new coolant. And the upper and lower hoses were caked with something on inside of hoses. Has anyone had a problem like this. Ram has no answer so far !!!! What you guys think ???
 

Mister Luck

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Wrong coolant or mix of coolant
what type iof coolant is being used ?
 

GTyankee

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Someone is not putting Mopar Oat Coolant in the radiator

If anything is put in the radiator besides OAT Coolant from Mopar, you are asking for the whole system to gel every time
 
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jogris

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My friend the oat coolant is the problem. No forget this is a issue from the beginning before dealer ever touched the truck ,, or anyone else for that matter. No other coolant has been put in the radiator
 
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jogris

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Also it not a gel ,, it is a black sediment that is in the system. I look in the old heater core and it was all crusted in the lower part of heater core. And the radiator was three times the weight of the new radiator. When I changed the clogged radiator
 

pacofortacos

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Has anyone pulled anything off of the block and flushed it?
On the older motors there were plugs and core plugs on them, I honestly haven't looked at my 5.7 block but I would think that they would still have some.
 
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jogris

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I had the engine completely flushed by machine so it was completely free of the oat. I put back HOAT And when I replace radiator that when I found sediment floating in the new coolant. I talked to Ram and so far they have no answer.
 
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jogris

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The new coolant only in engine a week when I discovered the clogged radiator
 

Erikk

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The block is full of casting sand. I’m having the same problem. 2014 2500 6.4. I just put up a post asking if anyone has put a spin on coolant filter in one of these trucks. I think having one on the heater in line is the only solution. I recently put this little in-line filter on the heater inlet but it needs to be cleaned out about every 4 hours of drive time.
 

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HEMIMANN

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If the block is full of casting sand, it should have glazed your cylinder walls and turned the engine into an oil pumper.

We had such an engine at the factory do this. I've never heard of a production engine block casting that wasn't rinsed out. Our engine was a prototype.
 

Erikk

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2014 2500 6.4. There is definitely a sand-like substance in these blocks. This is the only foreign material that I’ve flushed from my heater core and done it like 6 times in the last 2 years, (that’s when I put in a new thermostat then new Mopar oat/ distilled water, then drained again and it got a new radiator and new Mopar oat and distilled water.)CED811E9-AC2D-4E90-84BE-240E5C63DDDC.jpeg
 

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bigdodge

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The block is full of casting sand. I’m having the same problem. 2014 2500 6.4. I just put up a post asking if anyone has put a spin on coolant filter in one of these trucks. I think having one on the heater in line is the only solution. I recently put this little in-line filter on the heater inlet but it needs to be cleaned out about every 4 hours of drive time.
I just bought a similar one but bigger to go on after the thermostat. How long have you had it installed? That's pretty bad if it clogges in 4 hours
 

Erikk

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I just bought a similar one but bigger to go on after the thermostat. How long have you had it installed? That's pretty bad if it clogges in 4 hours
I’ve had it installed for just over a week. It’s not a large quantity of sand after 4 hours but it’s enough to degrade the flow enough that the oil cooler and heater core would quit being able to do their job. I think a spin on coolant filter is the only solution if I don’t want to either keep rinsing this filter out or back flushing the core. I hope someone on here who has installed one on a 6.4 HD can give some advice about where a spin-on filter could go (location) and if it provides enough flow when its on the heater inlet line.
 

mikeru

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The pic of the finger looks more like calcium deposits than sand to me
That's what I was thinking too.Definitely doesn't look like sand to me.
 

HEMIMANN

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Yeah, pretty sure that's not sand. Send in to a spectrometry lab to diagnose. Call Blackstone Lab to see if they'll do it for you. They have a mass spectrometer.
 

Erikk

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Our calcium in this part of Texas is white and that’s where this truck has spent it’s life, plus it’s never had tap water in it. Those little chunks rub down to something like dust. I wish I knew where to get it analyzed. My theory right now is that it’s the dust of the casting sand that was glued on certain internal surfaces after the block rinse that takes time to break loose. It didn’t start having a problem until about 95k miles.
 

Erikk

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I just talked to them. Blackstone doesn’t do anything like testing just the particles I flushed out. Could send them some coolant but it’s pretty fresh 150k mile Mopar oat so I’d hate to blow $40 on sending in my coolant just for them to tell me it still has plenty of miles left in it. I could spend that $40 on a couple gallons of gas!
 
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