Improving the cooling on our TJs

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TexasTJ2004

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I would say drain this and radiator, and almost everything comes out.
After thermocure, the water was so black, so I just decided to drain it all. After you do it first time, the second time is easy
 
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Frankred

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I'm not having cooling issues on my 04 but it is time for a flush. Does this look like it needs Thermocure?

20220806_085000.jpg
 
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TexasTJ2004

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I'm not having cooling issues on my 04 but it is time for a flush. Does this look like it needs Thermocure?

View attachment 348724
I started to deal with all my cooling system because my Jeep was running hotter that it should in my opinion.
In the process I found that I have a leaking heater core, Ton of rust inside the block etc.
in my opinion running good flush is always a healthy idea. Take into account that Thermocure removes only rust. You need something else to remove other deposits, I used BlueDevil.
When you remove the engine block drain plug , you can check how much rust you have on the inside. In my case I had quite a lot and thermocure removed all of it

74588AE8-B4BF-42ED-825D-4438C067AA10.jpeg
 
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TexasTJ2004

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Thermocure is fertilizer and salt.


The Diammonium Phosphate is why the coolant is coming out black

Here is the MSDS

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The issue is that if there is no rust, it does not turn black. Some of the folks here did 3 consecutive flushes with thermocure and in the second one the mix of water and thermocure came without any significant blackening.
 

Frankred

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I started to deal with all my cooling system because my Jeep was running hotter that it should in my opinion.
In the process I found that I have a leaking heater core, Ton of rust inside the block etc.
in my opinion running good flush is always a healthy idea. Take into account that Thermocure removes only rust. You need something else to remove other deposits, I used BlueDevil.
When you remove the engine block drain plug , you can check how much rust you have on the inside. In my case I had quite a lot and thermocure removed all of it

View attachment 348814

Thanks for the reply.
So I need Blue Devil and not Thermocure?
I just saw another thread talking about Prestone Flush+Cleaner too...
 
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TexasTJ2004

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Thanks for the reply.
So I need Blue Devil and not Thermocure?
I just saw another thread talking about Prestone Flush+Cleaner too...

I think that BlueDevil/Prestone and thermocure are doing different things. I think that thermocure removes rust, but not other deposits. BlueDevil/Prestone removes other deposits but useless against rust.
 
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TexasTJ2004

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difference between the 2 thermocure flushes. The first one on the right and the second one on the left. You can see that that the second there was almost rust,. So it didn’t turn too black.

EC5A5CA5-268E-4B9E-8CB1-0616EEEE1C38.jpeg