'Special Coolant Required'.....? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 01-01-2014, 06:15 PM   #1
Jeeper
 
Join Date: May 2010
Posts: 82
'Special Coolant Required'.....?

One of the possible options in my hunt trying to find out why my Jeep heat isn't working before the subzero freeze this weekend....... is low coolant.

Obviously the radiator, but there is also the fill canister which has printed in large letters 'SPECIAL COOLANT REQUIRED', but no clue as to what is this is.

I've of course looked on line and heard talk of HOAT, only available from the dealer (not an option on New Years) or Zerex, which is apparently no longer available commercially. And theres confusing talk about 'never mixing coolant colors'.

What is the special coolant people are using for Jeep Wranglers here, and is there anything that in particular won't gum up a heater core.... which may be the problem I have already even though I've tried flushing? Appreciate any advice. Not an expert, so asking....thanks!

jeffpas is offline   Quote Quick Reply
Old 01-01-2014, 06:20 PM   #2
Jeeper
 
Join Date: May 2010
Posts: 82
Plenty of chit-chat about coolant colors here, though no real answers...

Coolant - HOAT - JeepForum.com

jeffpas is offline   Quote Quick Reply
Old 01-01-2014, 06:21 PM   #3
Jeeper
 
OlYellerTJ's Avatar
 
Join Date: Nov 2010
Location: East of the CT River
Posts: 471
Zerex G-05 is a HOAT antifreeze. I get it at NAPA.
__________________
This message is composed of recycled electrons. None of these electrons has been harmed or injured in the creation and transmission of this message but they have been shamelessly exploited for this use.

Ol' Yeller TJ
OlYellerTJ is offline   Quote Quick Reply
Old 01-01-2014, 06:22 PM   #4
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 33,204
Images: 2
Zerex G-05 HOAT is still available in better auto parts stores, I get mine from NAPA. But to top it off today, you can use distilled water like you can find in any grocery store's water aisle. I never recommend using plain tap water since that can contain a high content of dissolved mineral content which can eventually clog up a radiator.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 01-01-2014, 06:35 PM   #5
Jeeper
 
Join Date: May 2010
Posts: 82
I had already picked up some prediluted Prestone 50/50 "ALL makes ALL models add to ANY color"........ insofar as having heater core problems, should I hold out for Zerex G-05 HOAT, or just top off the radiator with what I've got and fill the reservoir? Just a last ditch effort to see if it helps with the heat. Its odd, but it seems like the core hoses really aren't getting hot though the radiator is new.

Why the "SPECIAL COOLANT REQUIRED" if not required?
jeffpas is offline   Quote Quick Reply
Old 01-01-2014, 07:57 PM   #6
Jeeper
 
Join Date: May 2010
Posts: 82
I surrender, I'm just topping off with Prestone 50/50.......... cant flush the radiator out now and impossible to find the answer online.
jeffpas is offline   Quote Quick Reply
Old 01-01-2014, 08:15 PM   #7
Jeeper
 
freeskier's Avatar
 
Join Date: Mar 2011
Location: Longmont, CO
Posts: 2,636
DON'T mix the Prestone stuff with what's in there now. The "special coolant" is HOAT, it's what the factory specifies for newer TJs. If you want to use the Prestone "green stuff" you need to COMPLETELY flush out the whole system.
__________________
CU Boulder Aerospace Engineering
freeskier is offline   Quote Quick Reply
Old 01-01-2014, 08:28 PM   #8
Jeeper
 
LukeEC's Avatar
 
Join Date: Aug 2013
Location: New Jersey
Posts: 633
Quote:
Originally Posted by jeffpas View Post
I surrender, I'm just topping off with Prestone 50/50.......... cant flush the radiator out now and impossible to find the answer online.
see


Quote:
Originally Posted by Jerry Bransford View Post
Zerex G-05 HOAT is still available in better auto parts stores, I get mine from NAPA. But to top it off today, you can use distilled water like you can find in any grocery store's water aisle. I never recommend using plain tap water since that can contain a high content of dissolved mineral content which can eventually clog up a radiator.
That add to any color stuff is DEX COOL I would of topped it off with distilled water if there is sufficient coolant already present. Do it first thing in the morning and add the HOAT it's in your service manual
LukeEC is offline   Quote Quick Reply
Old 01-01-2014, 09:04 PM   #9
Jeeper
 
freeskier's Avatar
 
Join Date: Mar 2011
Location: Longmont, CO
Posts: 2,636
Quote:
Originally Posted by LukeEC View Post
see




That add to any color stuff is DEX COOL I would of topped it off with distilled water if there is sufficient coolant already present. Do it first thing in the morning and add the HOAT it's in your service manual
Dex-Cool is GM OAT coolant, I've never seen it marketed as add to any color. Typically the add to any coolant is the old school "green stuff" IAT coolant. Personally I would never mix anything, it's just asking for bad things to happen.

Either the Prestone "green stuff" or Zerex G-05 are compatible with our cooling systems. Chrysler didn't make the switch to HOAT coolant till later in the TJ production cycle so older TJs are specced for the "green stuff" and newer TJs are specced for HOAT. I wouldn't mix them together though.
__________________
CU Boulder Aerospace Engineering
freeskier is offline   Quote Quick Reply
Old 01-01-2014, 09:41 PM   #10
Jeeper
 
bluevr6's Avatar
 
Join Date: Oct 2013
Location: WNC
Posts: 668
Jeff: You have a TJ, right? If so, they "special coolant" is phosphate free stuff. That being the case, top off with the prestone fiddy/fiddy and wait till you can do a full flush and then fill with a quality coolant.o

The type of coolant (since you just had an engine installed a little while ago, you likely have "green" stuff in there, will not cause your heat issues.
bluevr6 is offline   Quote Quick Reply
Old 01-04-2014, 01:38 PM   #11
Jeeper
 
Chilly03's Avatar
 
Join Date: Mar 2013
Posts: 476
I came out yesterday to go to the store( in 18 degree weather) and noticed my check engine light on half way there, got home parked it and went out this morning and my coolant is super low, but has the green stuff. My TJ is an 03X should I use the Prestone 50/50 for now? My garage has my XJ in there a bit ripped apart, and flushing it on the street is not an option.

__________________
03 Wrangler 3" lift 33's
95 Cherokee sport 2dr. lifted 31's

(OIIIIIIIO)
Chilly03 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:04 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC