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14 JK, Rubi, Red, 6spd, JCR Front and rear bumpers, JCR control arms, TFlex HD Steering and drag lin
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I'm running a Mitsmoto myself. The stocker was leaking in the same area. I replaced the hoses with silicone ones and put in a new TStat housing. I live in AZ and the last thing I wanted to do is lose cooling. I would run a flush through the system before you dismantle it. I was lucky and didn't have the sludge/casting crap in my system.
 

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Hello, I am literally on my 4th radiator replacement due to a small leak on my 2013 JKU. The casting sand would make sense except for the fact I keep having the entire system flushed each time the radiator is replaced. I am considering going with the coolant filter kit but getting frustrated. Also being told to specify a KOYO brand replacement. Any additional advice? Thanks!
i
 

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Crazy, I know! I have been using the OEM brand of OAT that the manual recommends. (See below) You bring up a good point though as I heard Jeep changed mid year to this from the HOAT so I wonder if the shop is refilling with the wrong stuff.

View attachment 367891
Mixing HOAT with OAT shouldn't crack radiators I think. it causes coagulation and blocks the flow, but that should be it. I was thinking maybe there is something corrosive in the system, but seems unlikely. Are the radiator mounts ok? Perhaps the radiator is being pinched / twisted / stretched?
 

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Mixing HOAT with OAT shouldn't crack radiators I think. it causes coagulation and blocks the flow, but that should be it. I was thinking maybe there is something corrosive in the system, but seems unlikely. Are the radiator mounts ok? Perhaps the radiator is being pinched / twisted / stretched?
Your response makes sense on the mixing of coolant types. I wondered about the mounts as well as it does seem feasible there is excessive vibration and movement that could be causing the tank seal to leak. I gave the repair shop an earful on my last replacement since they are charging me for some of the labor. I would expect they would be know to ensure that is mounted properly given the number of replacements. Perhaps I assume too much! Thanks for the response!
 

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I still have the original 2013 OEM Radiator in mine. never had a leak or issues with it. Do yours all leak in the same area?
 

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I still have the original 2013 OEM Radiator in mine. never had a leak or issues with it. Do yours all leak in the same area?
They tend to seperate at the plastic "weld" to the metal on the majority of the failures. I blew one up running too straight a water mixture. The pressure from the steam just took out the whole upper left corner-

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