nitrous

Hi guys I just picked up a new to me 2005 3500 Laramie a couple weeks ago and noticed the antifreeze is the green kind.
After searching HOAT is the recommended type.
Is this going to cause me any issues ? should I drain the green stuff and refill with HOAT ??

Please help I am a little concerned here
Thanks

klx650a2

The HOAT can go longer without needing to be replaced. Personally I would drain, flush and replace as you don't know what kind of "green" antifreeze is in there (gas or diesel).

Dr.Dizzle

Unfortunately the color of coolant no longer indicates that it is of a certain formulation. Green colored coolants are typically available in three formulations (IAT) Inorganic acid technology aka. old school conventional green, (OAT) Organic acid technology and (POAT) Phosphated organic acid technology which is formulated and specified for asian cars. At the present time,I am not aware of any green dyed HOAT G0-5 formulated coolants.

Given the aforementioned information, I do not recommend using the "all makes all models" OAT formulated coolants touted as a one size fits all or any other non approved formulation in a vehicle factory filled with HOAT G-05 coolant. The dilution/mixing with non-equivalent coolants will significantly reduce or eliminate the extended life properties. For example, If you mix a 5 year/ 150,000 mile Hoat coolant with an IAT 2year/36000 mile coolant, you must replace the coolant at the 2 year 36.000 mile interval. Most importantly, the mixing of G0-5 HOAT and other formulations may result in unwanted compatability issues.

The third generation Dodge Ram specs. a (Glysantin) G-05 HOAT coolant. At the present time, there are four G0-5 HOAT coolants available. All of which are suitable for use in the Dodge Ram CTD.The following list contains those coolants:

Mopar 5 Year/100,000 Mile with (HOAT) Embittered

Ford / Motorcraft Premium Gold Engine Coolant - Ford Part #VC-7A

Mercedes Benz Antifreeze Agent - Part # Q 103 0002

Valvoline Zerex G-05 Hoat -
Available in concentrate. The NAPA part # is ZXG051. NAPA carries all of the Valvoline product line. If they do not have it on the shelves or behind the counter, a store associate can order it for you.

I recommend you perform a coolant flush and replace it with a HOAT coolant as per the list above. I have attached a link which illustrates the coolant flush procedure as demonstrated by member AH64ID.


https://www.dieseltruckresource.com/...=coolant+flush

nitrous

Thanks guys

Jeff in TD

Yeah, I'd dump it and flush it since there is no way to tell what is in there. Someone could have mixed types.

Zerex's web page says their HOAT G0-5 is used as Chrysler's factory fill, died red. The GO-5 is kind of a golden color.