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Old 04-03-2011, 10:06 AM   #1
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Radiator coolant

Just a quick question. I need to top off the radiator reservoir it's down at ADD. I'm going to flush and refill it once it gets nice out, for the time being the owners manual calls for Mopar HOAT coolant. Can I just pick up a jug of any HOAT at auto zone to top it off for now? There the pink factory coolant in there now. I just want to make sure I don't mix something that's not compatible.

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Old 04-03-2011, 10:26 AM   #2
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I would top it off with distilled water if your going to flush it soon no point of using coolant to top it off if your going to flush it soon would be a waste of money. Also I live in Philadelphia and we have pepboys auto zone and advance auto parts and non of them carried the HOAT coolant. Checked walmart cause I heard they would carry it and nothing but napa sells it so I heard and a couple other places we don't have here in phildelphia have it I ended up going to the dealer and picking up a gallon of coolant was about 20 dollars I believe picked up distilled water for it as well at walmart was like 80 something cents a gallon real cheap.

People also might tell you to use the preston 50/50 just depends on what you wanna use. I needed up just using the Preston cause I couldn't find the HOAT coolants anywhere and I needed my jeep running ASAP and didn't wanna look around anymore. Did a water pump job so needed new coolant.

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Old 04-03-2011, 10:54 AM   #3
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That's a good idea and cheap! My only concern is it's still pretty cold up here, below freezing at night.
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Old 04-03-2011, 11:48 AM   #4
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I add distilled water also, but it was almost 80 here yesterday
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Old 04-03-2011, 12:50 PM   #5
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Check your coolant with the "anti-freeze gauge thingy" (tech term). If the gauge says the coolant will handle the lowest tempature you can expect between now and when you chang it, add the distilled water.

After the flush, when you add new antifreeze/coolant, if you are going to use the 50/50 stuff, make sure the lowest temp is well with in your coldest temp range for your area. I believe the 50/50 id only good for the low -30's. Also, remember the NWS is usually at an airport, ie not in a ravine/canyon/low area where 15-20 feet drop will/can make a difference of 10-15 degrees colder.
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Old 04-03-2011, 02:19 PM   #6
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the thingy is a hydrometer () and they are cheap at any parts store or walmart. dont mix anti-freezes, ones that can be mixed will say so on the jug. if you coolant still has good color, i wouldnt bother flushing it now. might as well wait to next fall before it gets cold again to add fresh stuff. when you buy it, use what you prefer, though if you have a vehicle that is under warranty be careful you dont use something that voids this. also dont buy premixed anti-freeze or you are paying for half water.
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Old 04-03-2011, 04:39 PM   #7
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when you choose HOAT, make sure not to buy anything by Prestone. nothing they sell is HOAT or Mopar equivalent.

You can HOAT at the local auto parts store - Zerex GO5, or dealer antifreeze from a Mercedes dealer, a Mopar/Chrysler dealer or a John Deere dealer.
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Old 04-03-2011, 04:48 PM   #8
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Quote:
Originally Posted by UnlimitedLJ04 View Post
when you choose HOAT, make sure not to buy anything by Prestone. nothing they sell is HOAT or Mopar equivalent.

You can HOAT at the local auto parts store - Zerex GO5, or dealer antifreeze from a Mercedes dealer, a Mopar/Chrysler dealer or a John Deere dealer.
Yep, what ever you buy make sure it says G-05. Do not buy Dexcool. Dexcool is OAT, not HOAT.

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