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Old Nov 23, 2010 | 02:38 PM
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From: George West, Texas....
Question ELC

I've got the red extended life coolant in my PSD, I think it is Rotella.
I need to add a little but can't find the red elc close.
Is it safe or will it mess up my ELC if I add another brand ?
I don't want to add the green, I'd rather add distilled water.
Any suggestions or hints or tips ?
Thanks
 
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Old Nov 23, 2010 | 03:50 PM
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You'll be fine as long as it's an OAT ELC, but don't mix chemistries.
 
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Old Nov 23, 2010 | 04:41 PM
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I was in SoCal one weekend a few years back when I realized my degas bottle (radiator reservoir) was almost completely empty, about an inch or so from the very bottom.

I went the rest of the weekend before driving home the 9+ hours and I was good to go. I just monitored the level making sure the res never completely went empty and when I got home, I filled it back up with ELC.

How low is your res?

Stewart

PS - X2 what Clux said.
 
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Old Nov 23, 2010 | 07:01 PM
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From: George West, Texas....
Mine is only down about 4 in...
I've filled it up several times but it always drops about 2 in and holds there. So I just leave it there but now it's down about 4 in... When I get back, I'll run it up on the ramps and see if I can find a leak or something.
Thanks for all the info..
 
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Old Nov 23, 2010 | 07:21 PM
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LOL, my dad and I were discussing this the other day. No matter how many times we fill it, it still drops an inch or two. So we both just stopped filling it, and it's never dropped lower. Weird.
 
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Old Nov 23, 2010 | 08:04 PM
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Could probably get by w/ the distilled as long as the temps aren't below freezing. Can always drain a little later & add some more elc
 
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Old Nov 23, 2010 | 10:32 PM
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How do you test whether your ELC mix is right, anyway? Would plain ol' antifreeze test devices from a parts store work?

Mark
 
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Old Nov 23, 2010 | 11:15 PM
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As long as you can see some in reservoir, I wouldn't bother, it would not overheat. Just find what you like and add then, (but I ran all kind of brands and mixes in my 99 and not one problem and it has way over 400k.)
 
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Old Nov 24, 2010 | 12:04 AM
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Originally Posted by Vitaliykit
Just find what you like and add then, (but I ran all kind of brands and mixes in my 99 and not one problem and it has way over 400k.)
Add enough of the "find what you like" that isn't an OAT ELC and you lose the benefits of the ELC. You just can't do that to a rig that's been backflushed and filled with a heavy duty Extended Life Coolant and you do a disservice even suggesting that to the OP.

Stewart
 
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Old Nov 24, 2010 | 12:35 AM
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sorry, i didn,t make myself clear, by saying what you like I meant - red extended life coolant, that's why I started by saying that "As long as you can see some in reservoir, I wouldn't bother" - meaning not to be in the hurry and add just anything, but I made it confusing by the way I ended it. Sorry. Hope this helps.
 
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Old Nov 24, 2010 | 01:00 AM
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Yeah, it absolutely does!

Stewart
 
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Old Nov 24, 2010 | 07:56 AM
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Originally Posted by ScaldedDog
How do you test whether your ELC mix is right, anyway? Would plain ol' antifreeze test devices from a parts store work?

Mark
Depends on what you mean by "plain ol' antifreeze test devices".

Red ELC is still ethelene glycol, it's the additive package that's different.

That means the specific gravity will be virtually the same as conventional coolants, and the hydrometer-type testers (for freezing point) will work just fine.

However, the specialized test strips for testing the previously-added SCA's will likely not indicate properly.

If you've done a thorough flush of the system when installing the red, you won't ever need those test strips again, anyway.

Pop
 
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Old Nov 24, 2010 | 03:44 PM
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Originally Posted by SpringerPop
Red ELC is still ethelene glycol, it's the additive package that's different.

That means the specific gravity will be virtually the same as conventional coolants, and the hydrometer-type testers (for freezing point) will work just fine.
That's exactly the answer I was looking for. Thanks!!!

I'm putting one of Clay's water pumps in soon, and need to top off the bottle when that's done. I'd like to know whether I should top it off with CAT ELC, distilled water, or a mixture, and this will tell me that.

Mark
 
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