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  • Do we need to change that Long Life Coolant anyway?
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Do we need to change that Long Life Coolant anyway?

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 #350897  by 300maximilien
 
Change it if you want to next time you service the Coolant.

IIRC green is only good 2-3 years and 30k miles
 #353803  by nokestev
 
I use the Walmart stuff with distilled water (the key), with good results. Operating temp is rock solid. They say it's extended life 5 year/150,000 mile, but I'd go 3 with it.
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 #353835  by Sneke_Eyez
 
I thought the early green stuff was an early version of HOAT?
I never use anything but HOAT after seeing the grime that grows when you use the mix with everything stuff, but that's just me and I've never owned an LH older than 01.

I just changed the coolant in the 02 Pro Am and it had the orange HOAT stuff - my 01 Intrepid SE had it as well.
 #353890  by nokestev
 
It seems that the Walmart stuff is ethylene glycol, IAT type (the common old fashioned kind) with 2-ethylhexanoate (2-EHA). That last ingredient seems to be controversial, in that it softens plastics, particularly silicone, therefore gaskets, o-rings, hoses are in danger of failing prematurely. Some manufacturers like Dexcool, Prestone, and others that use the Dexcool formula contain 2-EHA.

The manual for my '99 calls for ethylene with OAT additives. Considering the age of my car, I think I'm going to stay away from coolants containing that 2-EHA (Walmart).

Looks like I agree with the initial post of using Zerex HOAT G-05 type, or Mopar.

What a difference some reading makes, made a convert out of me.
 #353902  by nokestev
 
I just replaced my intake manifold gaskets and looking at the old ones, the rubber part around the coolant passages had failed. I have had this car for a little over a year, and have used Wal-Mart green antifreeze, I can't prove cause and effect here, but if I use the HOAT stuff, this kind of repair may be avoided.
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 #353930  by Sneke_Eyez
 
Glad to see you convinced yourself, Norm.
Hate to see the grime and gunk growing in your system and failures of gaskets as a result of not using the right stuff.

The HOAT coolant isn't that much more expensive when it comes down to it, especially if it prevents issues.
 #376195  by mac.os.x
 
hi guys I don't know if this is correct place to post this but I have a 1999 Chrysler 300M 3.5l and I was curious is the coolant, (HOAT) you guys recommend okay in the older 300M? and if not what would you recommend I need to know color.
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 #376199  by beespecial
 
mac.os.x wrote: October 20th, 2018, 3:51 am hi guys I don't know if this is correct place to post this but I have a 1999 Chrysler 300M 3.5l and I was curious is the coolant, (HOAT) you guys recommend okay in the older 300M? and if not what would you recommend I need to know color.
Yes, HOAT type coolant is the proper antifreeze for your car. Zerex makes a HOAT coolant, it comes a gold bottle, but read the bottle to make sure you're getting HOAT.
If you currently have some other type of coolant in your car, or you don't know what it is, you should flush the system very well with distilled water to insure all the other type is removed before adding HOAT type coolant.