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Old 07-08-2018, 10:15 AM
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Need help with coolant question

Jk 2013 with a leak at the water pump. Lost almost all the coolant getting it home with adding water to keep it working. (About 8 liters of water went into the system) so I have replaced the water pump and I have filled it up with distilled water and ran up to temp , cooled and removed the lower hose 5 times to flush and drain as much of the old water/ coolant out. Per the Jeep book the system hold about 13 liters of coolant and since you can’t drain 100% of the coolant how do I add the right amount now that I’m ready to fill with OAT coolant at a 50/50 mix?

Jim

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Old 07-08-2018, 04:21 PM   #2
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You won't be able to get an exact measurement...as you note, unless you somehow blew the system out with air (don't do that) there is always going to be some left. It's just a guideline so you know how many jugs to buy.

You'll find lots of threads on how to burp the system properly... if you've changed your own water pump it will be no big deal...

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Old 07-08-2018, 09:27 PM
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The water pump was a very simple swap. Have to pull the alt. Which is not hard either. I was worried about leaks afterward due to the o ring seal but it went well and no leaks.
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Old 07-09-2018, 02:21 PM   #4
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Quote:
Originally Posted by MyWhiteRubi View Post
Jk 2013 with a leak at the water pump. Lost almost all the coolant getting it home with adding water to keep it working. (About 8 liters of water went into the system) so I have replaced the water pump and I have filled it up with distilled water and ran up to temp , cooled and removed the lower hose 5 times to flush and drain as much of the old water/ coolant out. Per the Jeep book the system hold about 13 liters of coolant and since you can’t drain 100% of the coolant how do I add the right amount now that I’m ready to fill with OAT coolant at a 50/50 mix?

Jim
I did a redneck flush a while back and took a few measurements. (https://imgur.com/a/Ehcvy, third picture caption)

To summarize, the book says my 2013 coolant system requires 10.5 Quarts, if you remove the lower hose from the radiator, you can drain about 5-6 quarts. That's roughly half, so now you can fill it the rest of the way with full concentrate to get your 50/50 (OAT, Purple, 150K Mile, 68163848AB)
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Old 07-09-2018, 03:50 PM   #5
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What he said. If you have pretty flushed all the old coolant out and doing that 5 times that is what you did. Just add 6-7 quarts of coolant and call it a day. If it take more just add water.
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Old 07-10-2018, 04:31 AM
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What is a redneck flush?
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Old 07-10-2018, 12:13 PM   #7
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What is a redneck flush?
lol, just drain it and fill it a couple times.

The "proper" method involves a hose, some flushing fluid (reminds me of CLR), some special adapter tools, and making it all flow backwards.

*insert meme* I ain't got time for dat!

At least I used distilled water.
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Old 07-18-2018, 11:13 PM   #8
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that fluid can actually use clr it works great on heater cores too. , lemon juice if you have access to lots of lemons will work , the old school kits used to be able to purchase granuals of oxalic acid, which is probably the best . Dont use muratic acid on aluminum radiators unless you really know what your doing, I use it but also am a chemist and have access to rodine to use as an inhibitor. Thats what i thought of when he said redneck flush. For things like farm equipment that use brass radiators hence redneck. If your mixing acid and water remember to always add the acid to the water and not the other way around, if so you get an exothermic reaction (gets hot) and risk direct spray /fumes that are not good for you.
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Old 07-29-2018, 11:10 AM
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I replaced the water pump, filled it with distilled water, ran it up to temp. Drained it and filled it with Preston radiator cleaner (green) from there I just filled with distilled water and ran it up to temp and then drained. I kept doing this until it can out clear, so I knew the cleaner was out. No green tint assumed it was good. I then drained the final time and filled with OAT mopar coolant. I got a gallon and a half in it so I think I’m close to a 50/50 mix.

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