What coolant is in my truck??

[Rampant]

Gentleman jack,

When you realize you paid more money for the same whiskey that is just filtered one more time.

Im not fond of the concept. But it IS decent whiskey

It was free. The neighbor bought it for me because I used my snowblower on his driveway after the storm we had last month.

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[Hemi395]

Well guys wish me luck. I have 10 gallons of Distilled water, 2 gallons of concentrate OAT coolant, 2 gallons of premixed OAT coolant and I'm going to flush my coolant this afternoon when I get home from work. Anyone actually done this on a modern Hemi before? Anyone know where the block drain plug is? Any other tips?

 

[Rampant]

Well guys wish me luck. I have 10 gallons of Distilled water, 2 gallons of concentrate OAT coolant, 2 gallons of premixed OAT coolant and I'm going to flush my coolant this afternoon when I get home from work. Anyone actually done this on a modern Hemi before? Anyone know where the block drain plug is? Any other tips?

Nope, and I haven't seen any tutorials either **wink wink** Did you look on Alldata? If not using the "fill tool", I'd drain it at the petcock and/or lower radiator hose. Then fill with water and run it up until hot and let it cool a bit. Next I'd open the petcock and run it while the thermostat is still open and keep putting distilled water in the reservoir. I'd keep doing that until it comes out clear. Maybe have a healthy dose of RMI or other coolant flush with the first water/warmup fill.

If you have a compressor, you can displace the remaining liquids by forcing some air in through the reservoir by sealing it around the nozzle at the reservoir opening as best you can with the petcock open too. Some sort of low pressure/high volume air pump would actually work better, like a leaf blower, air bed inflator, etc. Just be sure you open that bleeder port before you start to refill it.

 

[Hemi395]

Nope, and I haven't seen any tutorials either **wink wink** Did you look on Alldata? If not using the "fill tool", I'd drain it at the petcock and/or lower radiator hose. Then fill with water and run it up until hot and let it cool a bit. Next I'd open the petcock and run it while the thermostat is still open and keep putting distilled water in the reservoir. I'd keep doing that until it comes out clear. Maybe have a healthy dose of RMI or other coolant flush with the first water/warmup fill.

If you have a compressor, you can displace the remaining liquids by forcing some air in through the reservoir by sealing it around the nozzle at the reservoir opening as best you can with the petcock open too. Some sort of low pressure/high volume air pump would actually work better, like a leaf blower, air bed inflator, etc. Just be sure you open that bleeder port before you start to refill it.

Thanks! I did check alldata and all it says is "drain coolant from radiator petcock" which I already knew. I was toying with the idea of removing the thermostat and letting it run like that while I'm flushing it with water. I did see that video and I'll definitely remove that when I'm filling it up. My concern is getting all the water out once I flush it to ensure I get a 50/50 mix. I bought an antifreeze tester to check the freeze protection.

I'm doing this in my folks
2 car garage and they do have a compressor. I'm thinking about pulling the heater core hoses and gently (10-15psi) blowing the heater core out and then flushing with water, then blowing out the water.

Just a little nervous about this, the last vehicle I did a flush on was my 1988 Trans Am 15 years ago. That was a small block Chevy which was ridiculously easy to work on.

And yes lol I get it I'll take as many pics as I can and maybe do a write up...

 

[Rampant]

Thanks! I did check alldata and all it says is "drain coolant from radiator petcock" which I already knew. I was toying with the idea of removing the thermostat and letting it run like that while I'm flushing it with water. I did see that video and I'll definitely remove that when I'm filling it up. My concern is getting all the water out once I flush it to ensure I get a 50/50 mix. I bought an antifreeze tester to check the freeze protection.

I'm doing this in my folks
2 car garage and they do have a compressor. I'm thinking about pulling the heater core hoses and gently (10-15psi) blowing the heater core out and then flushing with water, then blowing out the water.

Just a little nervous about this, the last vehicle I did a flush on was my 1988 Trans Am 15 years ago. That was a small block Chevy which was ridiculously easy to work on.

And yes lol I get it I'll take as many pics as I can and maybe do a write up...

Legit plan of attack. You'll do fine.

 

[guyc66]

Well guys wish me luck. I have 10 gallons of Distilled water, 2 gallons of concentrate OAT coolant, 2 gallons of premixed OAT coolant and I'm going to flush my coolant this afternoon when I get home from work. Anyone actually done this on a modern Hemi before? Anyone know where the block drain plug is? Any other tips?

I'm not sure if this video will help, but thought it might be of some use to you. Good luck!

 

[S0CAL]

I'm not sure if this video will help, but thought it might be of some use to you. Good luck!

the dude is a rockstar. I wish he'd do more on our truck

 

[U&A]

It was free. The neighbor bought it for me because I used my snowblower on his driveway after the storm we had last month.

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Tell him to keep buying it. I own a good amount of stock in B&F.

 

[Hemi395]

Well, shes got OAT in her now for sure. Only problem I ran into was the drivers side engine block drain was PERFECTLY behind the starter. I was not going to pull the starter out and reinstall every time I went to flush it wish water. **** that. I would love to find the engineer that thought this was a good idea.

Anyways because of this I pulled the thermostat out and flushed about 5 gallons of distilled water through the system with the tstat removed. Drained it out of the radiator, passengers side block, and heater core hoses until it was clear. Then for the final drain I pulled the lower radiator hose and let it drain for about 5 mins. Reinstalled the tstat and refilled the radiator with premixed 50/50 Mopar OAT. Ran the engine until the tstat opened and continued to fill with 50/50. When it was full I tested the freeze protection and it was only about -10F which I was expecting since the drivers side of the block was full of distilled water. So I drained about 3 quarts out of the radiator and refilled it with 3 quarts of concentrated Mopar OAT. Ran it again for a about 15 mins with random 1-2min 2000RPM runs to help circulate and mix everything. Rechecked the freeze level and it was around -25. I figure at this point in the winter it will never get down to that here so I'll just drive it around for a few days and check it again. If the freeze protection has gone up or down I'll drain a couple quarts from the radiator and add more concentrated OAT or distilled water accordingly.

All in all it wasn't that bad. The radiator has a nipple to add a hose to drain into a container for a mess free drain. The block drain was messy as hell but that's to be expected. If the drivers side block drain was easier to get to it would be a super easy flushing process.

 

[R.L.K.]

Well, shes got OAT in her now for sure. Only problem I ran into was the drivers side engine block drain was PERFECTLY behind the starter. I was not going to pull the starter out and reinstall every time I went to flush it wish water. **** that. I would love to find the engineer that thought this was a good idea.

Anyways because of this I pulled the thermostat out and flushed about 5 gallons of distilled water through the system with the tstat removed. Drained it out of the radiator, passengers side block, and heater core hoses until it was clear. Then for the final drain I pulled the lower radiator hose and let it drain for about 5 mins. Reinstalled the tstat and refilled the radiator with premixed 50/50 Mopar OAT. Ran the engine until the tstat opened and continued to fill with 50/50. When it was full I tested the freeze protection and it was only about -10F which I was expecting since the drivers side of the block was full of distilled water. So I drained about 3 quarts out of the radiator and refilled it with 3 quarts of concentrated Mopar OAT. Ran it again for a about 15 mins with random 1-2min 2000RPM runs to help circulate and mix everything. Rechecked the freeze level and it was around -25. I figure at this point in the winter it will never get down to that here so I'll just drive it around for a few days and check it again. If the freeze protection has gone up or down I'll drain a couple quarts from the radiator and add more concentrated OAT or distilled water accordingly.

All in all it wasn't that bad. The radiator has a nipple to add a hose to drain into a container for a mess free drain. The block drain was messy as hell but that's to be expected. If the drivers side block drain was easier to get to it would be a super easy flushing process.

So all in all how much distilled water ,50/50 mix and Concentrated mix OAT did you require , as I plan to do this very thing this summer .

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[R.L.K.]

Did you take detailed photos ?

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[monteholic]

I'd like to see picture of the block drains

 

[R.L.K.]

Did you use low air pressure to blow out the heater core , you mentioned you might if I remember correctly.

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[U&A]

I read a tip. Jack up the front of the truck as high as you can with your floor jack. Do this durring the fill procedure. Up and down a few time to possibly help air work its way up to the fill cap in the system.

Let us know how the color responds Cory. Keep an eye on air bubbles and cloudiness

 

[Hemi395]

So all in all how much distilled water ,50/50 mix and Concentrated mix OAT did you require , as I plan to do this very thing this summer .

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All in all I used about 6 gallons of Distilled water, 1.5 gallons of premixed Mopar OAT, 3qts of Mopar OAT concentrate. I still haven't gotten the mix perfect yet so I may use more concentrate. If I had to do it again I'd just get the concentrate, it's easier to dial in the mix after flushing with water.

And if you can figure out a way to get to the block drain without removing the start please let us know...

 

[Hemi395]

Did you take detailed photos ?

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I did take some pics I'll post them later

 

[Hemi395]

Did you use low air pressure to blow out the heater core , you mentioned you might if I remember correctly.

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I did and not much came out of the heater core. Most of it drained out on it's own because the hoses are lower than the heater core...

 

[Hemi395]

I read a tip. Jack up the front of the truck as high as you can with your floor jack. Do this durring the fill procedure. Up and down a few time to possibly help air work its way up to the fill cap in the system.

Let us know how the color responds Cory. Keep an eye on air bubbles and cloudiness

Cool I ended up having to do that anyway just to get to the block drain...

 

[U&A]

Cool I ended up having to do that anyway just to get to the block drain...

But you never ended up using the block drain correct...?

 

[Hemi395]

But you never ended up using the block drain correct...?

Yes I was able to get to the passenger side drain just not the driver's side because of the starter