Cat coolant question

[Evil PSD]

I just picked up 4 gallons of cat coolant, want to make sure it's the right stuff

[sargar]

Looks like it.

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[dieselmatt]

Yup! I would get at least another gallon to have as a spare in the garage or back of the truck. For the spare, make sure to mix it so 1 gallon will make 2.

[04blackcrewcab]

Thats concentrate though. If you're doing a complete flush you'll want to get some 50/50 as well. 238-8648 is the part number. When I did my flush, since theres some water left in the block that you can't get out, I tossed in 1 gallon of the concentrate, and then 50/50 from there on out.

[04blackcrewcab]

Weird. I pulled the drain plug on the block out and drained out about 7 gallons. 6.4 coolant capacity is right around 8. I just did this 3 weeks ago.

[04blackcrewcab]

I just double checked. Per alldata, the 6.4 capacity is 7.66 gallons. Only 80% of the fluid can be recovered with the engine in the vehicle. So you should only be putting about 6ish gallons back in. I did an EGR full delete though so I put in less. The EGRs actually hold a ton of coolant!

[Evil PSD]

After all the research on here i read to get the full strength, dump about 3.5 gallons of coolant then top it of with distilled water . What should i do?

[04blackcrewcab]

Go buy a bunch of distilled water and measure how much you can drain each time and you'll know for sure. The radiator has a drain and so does the block on the drivers side kindof above the front drive shaft. And report back for sure!

[Doss]

Originally Posted by 04blackcrewcab

Thats concentrate though. If you're doing a complete flush you'll want to get some 50/50 as well. 238-8648 is the part number. When I did my flush, since theres some water left in the block that you can't get out, I tossed in 1 gallon of the concentrate, and then 50/50 from there on out.

What? I don't understand any of that reasoning. That would be way more expensive and only save you the trouble of having to 1:1 add coolant to water.

If all you did was add 1 gallon of concentrate, I think your mixture is off. Here's the rough math:

8 gallons total (rough) = 1gal concentrate + 3gal leftover water from flush + Xgal 50/50
:X= 4gal
:4gal 50/50 = 2gal coolant + 2gal water
8gal total = 3gal coolant + 5 gal water = 40:60 coolant

I did some rounding just to make it look cleaner on the numbers, but your mixture is off if you just added 1 gallon of concentrate and the rest are 50/50. The problem is you're offsetting 3 gallons of left over flush water with 1 gallon of concentrated coolant. That is not a 50/50 combination.

OP, use the concentrate like you have (238-8647) and put it in. Add distilled water to top off. Done.

[04blackcrewcab]

Originally Posted by Doss

What? I don't understand any of that reasoning. That would be way more expensive and only save you the trouble of having to 1:1 add coolant to water.

If all you did was add 1 gallon of concentrate, I think your mixture is off. Here's the rough math:

8 gallons total (rough) = 1gal concentrate + 3gal leftover water from flush + Xgal 50/50
:X= 4gal
:4gal 50/50 = 2gal coolant + 2gal water
8gal total = 3gal coolant + 5 gal water = 40:60 coolant

I did some rounding just to make it look cleaner on the numbers, but your mixture is off if you just added 1 gallon of concentrate and the rest are 50/50. The problem is you're offsetting 3 gallons of left over flush water with 1 gallon of concentrated coolant. That is not a 50/50 combination.

OP, use the concentrate like you have (238-8647) and put it in. Add distilled water to top off. Done.

Well I'm glad you dont understand the part where I said I drained about 7ish gallons total out of my system leaving a gallon or so in the block.... I don't care what others have done or what people say is "suppose" to be left in the block ie: 3 gallons. Its what I personally experienced when I did my own truck just a few weeks ago.