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Unread 11-05-2011, 08:22 PM   #16
chris142
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Quote:
Originally Posted by J03_TJ View Post
Hey Chris,
What's your thoughts on this prestone stuff? I flushed and refilled my '03 with it about 3 years ago. Life-wise it claims up to 150,000 miles/5 years. Is there anything in the '03 block/cooling areas that wouldn't play nice with this stuff? Thanks if your still following this.
Okay, back to the original topic.
That's a Dexclone.I don't recomend that it be used in a system that does not have a pressurized overflow bottle.

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Unread 11-05-2011, 08:24 PM   #17
Patrick H
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Quote:
Originally Posted by chris142 View Post
That's a Dexclone.I don't recomend that it be used in a system that does not have a pressurized overflow bottle.
Except that Prestone is green, not Dex-Cool orange.
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Unread 11-05-2011, 09:07 PM   #18
J03_TJ
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Quote:
Originally Posted by chris142 View Post
That's a Dexclone.I don't recomend that it be used in a system that does not have a pressurized overflow bottle.
EEk, I put that stuff in my jeep, now I find this out. Do you think it hurt anything? Okay so what would you recommend I replace it with. I thought it was the universal green stuff, it was green if I recall. Thanks for the info!
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Unread 11-05-2011, 09:21 PM   #19
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Quote:
Originally Posted by J03_TJ View Post
EEk, I put that stuff in my jeep, now I find this out. Do you think it hurt anything? Okay so what would you recommend I replace it with. I thought it was the universal green stuff, it was green if I recall. Thanks for the info!
check the radiator...here's what dexcool does...

http://www.jeepforum.com/forum/f9/wh...9/#post9555179

flush it quick....
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Unread 11-05-2011, 10:34 PM   #20
J03_TJ
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check the radiator...here's what dexcool does...

http://www.jeepforum.com/forum/f9/wh...9/#post9555179

flush it quick....

Not sure there will be anything quick about it since it's been in there over 2 years.

So this Zerex G-05 is the ticket from what you stated in the link you provided. Now, have to see what they have at Napa, maybe even Walmart tomorrow.
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Unread 11-05-2011, 10:54 PM   #21
JeephtimS
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Zerex G-05 seems to be the best. I've seen what dexcool (orange) and the pink stuff does. And always use distilled water, never ever never use tap water or faucet water!!!!!!
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Unread 11-06-2011, 05:30 AM   #22
BYuen
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Are you guys sure you aren't getting confused between the two different types of Prestone coolant?

Here's the Dex-Cool version:
http://www.prestone.com/products/ant...st#product-411

And here's the regular Prestone (what I've been using after flushing my coolant system completely):
http://www.prestone.com/products/ant...st#product-378

It also says it meets the Chrysler specs (scroll down a bit):
http://www.prestone.com/learn_more/f...elect_region=1

If I recall correctly from the bottle, the non Dex-Cool Prestone is ethylene glycol based. I've been using that coolant for over 70,000 miles now with my original radiator and there is no abnormal corrosion at all. I still have the original radiator in my TJ with over 160,000 miles.
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Unread 11-06-2011, 07:17 AM   #23
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Are you guys sure you aren't getting confused between the two different types of Prestone coolant?

...
If I recall correctly from the bottle, the non Dex-Cool Prestone is ethylene glycol based.
All coolant....HOAT, OAT and IAT...is ethylene glycol based....here's the MSDS for Prestone Dex-Cool - clicky

the chemistry problem arises due to the anti-corrosion additives. mixing the different types of additives is what leads to the contamination issues. the only stuff thats not ethylene glycol based is low-toxicity coolant, which is propylene glycol based (this chemical is also in toothpaste). the color is just a dye and has no relevance.

Here's an application chart - http://www.valvoline.com/pdf/Zerex_CoolantChart.pdf and http://www.englefieldoil.com/PDF/Zerex_chart.pdf
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Unread 11-06-2011, 07:17 AM   #24
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Originally Posted by BYuen View Post
Are you guys sure you aren't getting confused between the two different types of Prestone coolant?

Here's the Dex-Cool version:
http://www.prestone.com/products/antifreeze_coolant/product_list#product-411

And here's the regular Prestone (what I've been using after flushing my coolant system completely):
http://www.prestone.com/products/antifreeze_coolant/product_list#product-378

It also says it meets the Chrysler specs (scroll down a bit):
http://www.prestone.com/learn_more/frequently_asked_questions?select_region=1

If I recall correctly from the bottle, the non Dex-Cool Prestone is ethylene glycol based. I've been using that coolant for over 70,000 miles now with my original radiator and there is no abnormal corrosion at all. I still have the original radiator in my TJ with over 160,000 miles.
Any comments on this ^? I am not using the Dex-cool, I am using the yellow bottle stuff in the pic below.

this
vs.
this
prestone-dex-cool.jpg   prestone-all-makes.jpg  
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Unread 11-06-2011, 09:31 AM   #25
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I would be wary of the Prestone stuff - they may claim they meet Chrysler's specs, but the reason why Chrysler uses a specific HOAT coolant is because of certain materials (such as solder) present in the cooling system that don't work well with OAT formulas...Best to stick with the Zerex G05 or the Mopar stuff.
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Unread 11-06-2011, 12:47 PM   #26
BYuen
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Originally Posted by J03_TJ View Post
Any comments on this ^? I am not using the Dex-cool, I am using the yellow bottle stuff in the pic below.

this
vs.
this
After some searching it appears that all of Prestone's coolant is OAT based, but they say it's compatible with Chrysler's HOAT. I wouldn't mix the two. Just pick one or the other. It would be safest to go with HOAT, but if you've already flushed your system and switched to Prestone and have run it for a long time like I have, I wouldn't worry about it. Approaching 200,000 miles, I won't be too upset if it clogs or eats through my oem radiator. I check the coolant in my radiator often so if there's any abnormalities I should catch it early.
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