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Old 12-04-2007, 07:31 AM   #1
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antifreeze

My jeep is 5 years old and the coolant is low. Can I just add to it or should I flush it first? It has never been changed or flushed.

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Old 12-04-2007, 08:44 AM   #2
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Flush it. It's part of routine maintenance.

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Old 12-04-2007, 10:12 AM   #3
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If it been 5 years, you're overdue for a full flush.
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Old 12-04-2007, 12:21 PM   #4
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Anybody got a step by step on how to do a flush. (I mean more than "lean over and press the lever down")
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Old 12-04-2007, 12:38 PM   #5
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Go get a Flush kit from Napa or other parts house and follow instructions, Or take it to a shop and have a power flush done. we use Wynns and it works really well.
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Old 12-04-2007, 02:35 PM   #6
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I just got a coupon from my local Jeep dealing offering a full flush for $69.95.
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Old 12-04-2007, 04:35 PM   #7
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You are in Florida so this is not so temperature and time controlled. You generally don't have to worry about it freezing over nite.
Drain the system using the drain valve on the bottom of the radiator.
Remove, drain and clean out the overflow tank.
Refill with tap water after adding a gallon of white vinegar or Prestone 7 hour flush to the radiator.
If you use the prestone drive it by the time specified on the bottle. If using vinegar I think 1 day or so. Depends on how crudded up the system is.
Remember to keep your heater all the way in the hot position.
Re-drain the system.
Change the thermostat with another 195F and replace the pressure cap.
Avoid the fast 15 minute flushes, every time I have use one of them I have ended up with the seal or the bearings or both going on the pump, I think they use abrasives to clean with in them.
Then refill the system with a 50/50 mix of Prestone Green and DISTILLED water.
You can go even futher and disconnect the heater hoses from the engine side then use tap water to flush the heater core, back and forth so you get flow going both ways, don't try to seal the garden hose to the heater hoses either, most house pressure is like 50PSI, that core is used to only having to deal with 18PSI, you may blow it up..
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Old 12-04-2007, 07:27 PM   #8
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you said refill with prestone green?? mine has dexcool (orange) and i've got a TJ. did they use both styles of coolant on TJ's?
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Old 12-04-2007, 11:14 PM   #9
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then yours probly has a aluminum block?? or aluminum radiator. and a cool way to check if your anti freeze is still good is by using a volt meter to see if its acidic.
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Old 12-05-2007, 07:30 AM   #10
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According to the manual...you need to use an A/F with H.O.A.T additive. It's much more expensive than the geneirc A/F. but keep with the spec. requirement.
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Old 12-05-2007, 09:10 AM   #11
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Just because it is orange, it doesn't mean it's Dexcool. Chrysler HOAT is orange also.
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Old 12-05-2007, 10:39 AM   #12
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All my jeep XJ and TJ FSM's up till 2000 specify ethylene glycol. Thats the green stuff.
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Old 12-05-2007, 11:00 AM   #13
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Just go and buy the one from prestone thats says safe for all makes and models on the front. It is yellow when you pour it.
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Old 12-05-2007, 11:48 AM   #14
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Change the t stat while your at it. A good way for checking coolent is a volt meter. here is mine it's ready for a change.

0.4v and up it's to acidic.
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Old 12-05-2007, 01:53 PM   #15
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Quote:
Originally Posted by richp View Post
All my jeep XJ and TJ FSM's up till 2000 specify ethylene glycol. Thats the green stuff.
That's interesting... The tag on the overflow bottle for my '02 states "Use of special coolant required" so I checked the manual and it mentions to use Mopar ..... with H.O.A.T. I have never owned a vehicle that had this requirement for A/F so this caught my attention.

Goodlife states that his Jeep is 5 years old so I assume he's got an '02. The specification should be the same for all '02 Jeeps no?
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Old 12-05-2007, 01:56 PM   #16
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Quote:
Originally Posted by 4.0l sahara View Post
Change the t stat while your at it. A good way for checking coolent is a volt meter. here is mine it's ready for a change.

0.4v and up it's to acidic.
That's wild...I have used a viscometer before but I have never used a voltmeter to measure A/F.

What are the specs (DCV) for acceptance/replacement? Or are you just being a wise guy?

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