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  #1  
Old May 19th, 2014, 11:52 PM
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Dexcool Or Not

I just found Dexcool in my tank and was curious if anyone else uses this stuff? I've read about the alleged issues it causes but from what I can see it all looks normal.

Are the Defenders made to use Dexcool? Should I get this stuff out or just leave it? Thanks in advance.
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  #2  
Old May 20th, 2014, 12:17 AM
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Good info here on the subject: http://www.robisonservice.com/articles/Overheating.pdf
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  #3  
Old May 20th, 2014, 01:38 AM
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absolutely not!!!!
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  #4  
Old May 20th, 2014, 08:54 AM
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Thanks for the article and the response. I'll get the stuff out today.
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  #5  
Old May 20th, 2014, 10:33 AM
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Definitely get rid of it. if you have a compressor, you can blow out most of the coolant in the heater core.
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Old May 20th, 2014, 10:44 AM
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Dont have a compressor. Would a simple garden hose rinse out all the coolant?
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Old May 20th, 2014, 10:51 AM
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yes rinse until clear ... i would also remove one heater hose and flush the heater core ..
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  #8  
Old May 20th, 2014, 10:53 AM
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Quote:
Originally Posted by Jymmiejamz View Post
Definitely get rid of it. if you have a compressor, you can blow out most of the coolant in the heater core.
Do you recommend getting rid of it on LR3 too?
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  #9  
Old May 20th, 2014, 11:03 AM
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Quote:
Originally Posted by jafir View Post
Do you recommend getting rid of it on LR3 too?
I've never seen an LR3 with anything other than Dexcool in it, and they don't have too many cooling system issues other than the thermostat housings and upper bleed hose leaks. If I had one I would probably keep the Dexcool and change the coolant regularly.

------ Follow up post added May 20th, 2014 11:04 AM ------

Quote:
Originally Posted by Daniel1 View Post
Dont have a compressor. Would a simple garden hose rinse out all the coolant?
That's even better, I just always use an air hose since I don't have a garden hose at work.
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  #10  
Old May 20th, 2014, 11:26 AM
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I actually never knew this---I thought since they are the same aluminum block, that they would all use Dexcool. Now I need to flush my system!
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  #11  
Old May 20th, 2014, 12:22 PM
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I think the newer diesels (td5/puma) use dexcool
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  #12  
Old May 20th, 2014, 12:37 PM
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Nothing wrong with using Dex-cool. I'd leave it.
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  #13  
Old May 20th, 2014, 01:32 PM
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Nothing wrong with using Dex-cool. I'd leave it.
Dexcool is good stuff.



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  #14  
Old May 20th, 2014, 01:54 PM
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That looks like it was never changed.
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  #15  
Old May 20th, 2014, 02:13 PM
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That looks like oil got in the coolant to me.
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  #16  
Old May 20th, 2014, 02:14 PM
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Quote:
Originally Posted by o2batsea View Post
That looks like it was never changed.
That happens when it is overheated and is low on coolant. I've seen this a handful of times. I just happen to be working on a RRS that was overheated due to a hose blowing off. The vehicle is maintained here at the dealership, so it's probably be changed.
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  #17  
Old May 20th, 2014, 02:23 PM
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Looks more like someone put standard green coolant in with the Dexcool, which often causes that sludge buildup.
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  #18  
Old May 20th, 2014, 02:39 PM
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I have been using Dexcool for years---my hoses all look good, but I did have a clogged radiator and ended up over heating... So I really don't know if that was just age (about 9 years old on a 4-core radiator) or dexcool. They are both ethylene glycol based, no methanol, and no phosphate, but looking at the Prestone bottles for Dex vs non-Dex, they really don't say what the differences are. Does anyone know?
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  #19  
Old May 20th, 2014, 02:46 PM
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Just for kicks, Google Dexcool Lawsuit. There is a huge class action lawsuit against GM over Dexcool.
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  #20  
Old May 20th, 2014, 03:04 PM
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Dex Cool is not ethylene glycol based. It is an organic acid based formula that is not compatible with the glycol based coolants. The two shouldn't be mixed (even tho it sez you can on the dex cool bottle).
In the interest of full disclosure, I'm a green-dyed glycol man myself.

The Dex cool stuff has been around for years and much of the bad press is apocryphal. You gotta open the bonnet and check fluids folks! If you don't....
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