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FredoinSF 02-14-2011 05:15 PM

Coolant questions
My 02 WJ Ltd 4.7 V8 had some cooling / heating issues a couple of months ago. It started out with a radiator leak and after radiator replacement there was no heat. I thought it was blend door related but they turned out to be functional. I posted a thread and feedback pointed to a clogged heater core. Heat magically returned one day and has not left since, so I am guessing there was air trapped in the system from the radiator replacement and it worked itself out after multiple heating / cooling cycles.

It's been about 2 months / 3,000 miles since this happened and while I should be happy that all is working fine now, I am convinced the shop did not use the proper procedure to bleed the sytem and as a result, I am not trusting what they said about the coolant they used. They put in Prestone coolant, they said it is an ethylene glycol formula they put in everything :eek: and it would be fine for the Jeep.

Since I intend on keeping this car for 2 to 3 more years, I would really feel better if it had the HOAT special sauce Chrysler recommends. So, should I drain the Prestone and put in the HOAT coolant? If yes, do I need to do anyting other than drain and fill per the procedure at Knowing I had that no heat episode, should I leave it alone since everything is working just fine right now.

cheapjeep 02-15-2011 04:11 AM

Re: Coolant questions
I think you'll be fine. I've been using the regular green stuff in mine for years now.

01grand 02-15-2011 08:25 PM

Re: Coolant questions
If it is the newer kind of prestone it is a HOAT formula. Many manufacturers are going to this now. Ethylene glycol is I believe present in most or all coolants, and color is determined by the manufacturer of the coolant, not its chemical makeup.

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