what antifreeze is everybody using?
05-03-2004, 09:25 PM
#1
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what antifreeze is everybody using? is anybody using the dexcool in their coversion or just the green. I have seen some severe damage from the dex. 
05-04-2004, 07:22 AM
#4
I'm running Shell pre-mixed low silicon green stuff.
As for Dexcool, I ran it in my previous engine and it slimed/sludged up in the overflow tank. A GM engineer who happened to be at one of the tracks I raced at explained it to me...it's designed for use in completely closed cooling systems. The newer cars have a pressurized overflow tank, so the coolant isn't exposed to ambient conditions. Running Dexcool in a conventional vented overflow tank will accelerate sludging breakdown.
As for Dexcool, I ran it in my previous engine and it slimed/sludged up in the overflow tank. A GM engineer who happened to be at one of the tracks I raced at explained it to me...it's designed for use in completely closed cooling systems. The newer cars have a pressurized overflow tank, so the coolant isn't exposed to ambient conditions. Running Dexcool in a conventional vented overflow tank will accelerate sludging breakdown.
05-04-2004, 08:13 AM
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I think that Dexcool is used because its supposed to have a longer life, since nobody every flushes their coolant systems in newer cars. It doesn't like being mixed with other things and that's when the sludging begins.
05-04-2004, 01:51 PM
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Originally Posted by crainholio
I'm running Shell pre-mixed low silicon green stuff.
As for Dexcool, I ran it in my previous engine and it slimed/sludged up in the overflow tank. A GM engineer who happened to be at one of the tracks I raced at explained it to me...it's designed for use in completely closed cooling systems. The newer cars have a pressurized overflow tank, so the coolant isn't exposed to ambient conditions. Running Dexcool in a conventional vented overflow tank will accelerate sludging breakdown.
As for Dexcool, I ran it in my previous engine and it slimed/sludged up in the overflow tank. A GM engineer who happened to be at one of the tracks I raced at explained it to me...it's designed for use in completely closed cooling systems. The newer cars have a pressurized overflow tank, so the coolant isn't exposed to ambient conditions. Running Dexcool in a conventional vented overflow tank will accelerate sludging breakdown.
05-04-2004, 02:03 PM
#7
Originally Posted by 68LSS1
What he said. If you have a leak and are using Dexcool, this will also "sludge" the antifreeze. If your using a open system (with overflow) I wouldn't use Dexcool. With a closed system you can easily run more pressure which translates to lower operating temps though.
The only bad side-effect of this was it blew my old-as-dirt heater core after one season. After replacing that, I went with a 16# non-vented cap and that's what I'm running with the LS1 now.
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05-28-2004, 11:59 AM
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Dexcool Chevy Design
Originally Posted by crainholio
I'm running Shell pre-mixed low silicon green stuff.
As for Dexcool, I ran it in my previous engine and it slimed/sludged up in the overflow tank. A GM engineer who happened to be at one of the tracks I raced at explained it to me...it's designed for use in completely closed cooling systems. The newer cars have a pressurized overflow tank, so the coolant isn't exposed to ambient conditions. Running Dexcool in a conventional vented overflow tank will accelerate sludging breakdown.
As for Dexcool, I ran it in my previous engine and it slimed/sludged up in the overflow tank. A GM engineer who happened to be at one of the tracks I raced at explained it to me...it's designed for use in completely closed cooling systems. The newer cars have a pressurized overflow tank, so the coolant isn't exposed to ambient conditions. Running Dexcool in a conventional vented overflow tank will accelerate sludging breakdown.
If this is the case, why does my 97 Chevy Suburban have a non-pressurized overflow tank? Faulty design that I have to live with, or what?
05-28-2004, 12:56 PM
#12
Originally Posted by Thunderbolt
If this is the case, why does my 97 Chevy Suburban have a non-pressurized overflow tank? Faulty design that I have to live with, or what?
01-17-2005, 05:51 AM
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Originally Posted by 92CamaroReallySlow
So its ok to run the green stuff in an ls1 with out it eating anything up?
03-14-2005, 07:35 AM
#19
You must clean all of the Dex out if you will be changing to green stuff. It is said they will react if mixed togeather. maby wait till summer and then run h20 a few times then Green
