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Old 08-08-2013, 11:02 AM
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TJ radiator replacement

Hello this is my first post. Thank you in advance for the help. I have a 97 Wrangler 4 cyl that I need to replace a leaking rad on. Just picked up a new one along with a thermostat to replace while I'm at it. Everything seems pretty straight forward on the install my question is related to the coolant. If I drain the rad do I also drain the coolant in the engine and replace all of it? Do I just replace what's in the rad and mix it? The guy at the auto store sold me a gallon of peak full strength concentrate and told me to pour the whole thing in and the rest water. Also if the coolant I take out looks clean should I just reuse it? Any advise is appreciated. Thanks
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Old 08-08-2013, 11:09 AM   #2
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You should by a coolant system flush kit and flush the whole system. When adding water to that coolant you bought make sure that you use distilled water. Tap water will overtime leave hard water deposits (calcium buildup) throughout your coolant system and cause you problems. Tap water is fine to use to flush the system though. Also since you have to open the system anyways I would go ahead and flush the heater core.

Make sure that the thermostat you got is the proper thermostat for our Jeeps. Also make sure it has the bleeder he at the top of it. If not drill a 1/8" he at the 12 o'clock position (there are threads on this). Last but not least also do yourself a favor and go ahead and install a new radiator cap on that new radiator.

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Old 08-08-2013, 11:24 AM
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The tstat I got is a stint superstar 195 degrees. I believe the v notch in in serves that purpose correct. Is it OK if I bypass the flush for another time . Kind of pressed on time to get it done
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Old 08-08-2013, 11:35 AM   #4
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Sure it could be done later, but I wouldn't want to run potentially nasty crap through my brand new radiator. Everything I mentioned is just my opinion and not anything that you have to do. I learned years ago to do things right the first time and it will save you time in the end.

Ask yourself this..... Would you take a shower/bath and because you are pressed for time not use soap?

Again do it right the first time and you will save yourself time and money by not having to do it twice.
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Old 08-08-2013, 11:59 AM   #5
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Easy job. You'll have it done in less than an hour.
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Old 08-08-2013, 01:01 PM   #6
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Quote:
Originally Posted by Big Sarge View Post
Make sure that the thermostat you got is the proper thermostat for our Jeeps. Also make sure it has the bleeder he at the top of it. If not drill a 1/8" he at the 12 o'clock position (there are threads on this). Last but not least also do yourself a favor and go ahead and install a new radiator cap on that new radiator.
Big Sarge, would you point me to those threads?
Thanks!!
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Old 08-08-2013, 01:31 PM
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OK I'll try and find a write up to do it the right way . I'm still a little iffy on how to mix the coolant and how much the jeep takes . Also how do I empty the rest of the system aside from the rad? Thanks
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Old 08-08-2013, 01:36 PM   #8
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Big Sarge, would you point me to those threads?
Thanks!!

Here ya go

http://www.wranglerforum.com/f5/blee...ml#post3257056
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Old 08-08-2013, 03:08 PM   #9
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Thanks to Big Sarge!!
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Old 08-14-2013, 08:14 PM
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Well got it done on Saturday. Took your advice and got a flush kit and flushed the system. Seemed to be clean so it was probably done recently but glad I did it anyway for piece of mind. The rad replacement was easy but I had an issue with the tstat replacement. I had to take apart and reseat the housing 5 or 6 times bc it kept leaking badly. 3 different gaskets and a new housing (overtightened one of the times) later I got it done. I think the tstat was falling out of place just a little bit enough to create a problem. Thanks for your advice Big Sarge.
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Old 08-14-2013, 08:22 PM   #11
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Well got it done on Saturday. Took your advice and got a flush kit and flushed the system. Seemed to be clean so it was probably done recently but glad I did it anyway for piece of mind. The rad replacement was easy but I had an issue with the tstat replacement. I had to take apart and reseat the housing 5 or 6 times bc it kept leaking badly. 3 different gaskets and a new housing (overtightened one of the times) later I got it done. I think the tstat was falling out of place just a little bit enough to create a problem. Thanks for your advice Big Sarge.
No problem and glad you got it done. Sorry about the Tstat housing problems though. If you ever do it again or help someone else you can use a dab of grease to hold it in place until you get the housing put on.

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