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Old 07-07-2014, 04:42 PM   #1
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Angry radiator problems please help

hey jeeple

been having some issues with my radiators, to start off i replaced my oem radiator after the top had split, and moved to a mishimoto radiator. after about of year of normal driving/ offroading i noticed everytime after she sits for a while theres a nice 3inch puddle of coolant on the ground and dropplets on the bottom of the radiator. so i replaced it. now after 3 months its doing it again. i go thru about a gallon of coolant every 2month topping it off. Now what i need help with is identifying the problem,(duh) could it be that the radiator cap is to highly pressurized(19lbs) could my heater core be shot, i know its not hoses, nor the water pump. its driving me crazy anyhelp would be great thanks

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Old 07-07-2014, 04:46 PM   #2
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Does your oil smell like coolant?

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Old 07-07-2014, 04:50 PM   #3
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Clean up any existing coolant and make sure it's dry. Then:

- start it up and let it get hot
- shut it off
- watch for leaking coolant or wet spots

I know it sounds kind of simple, but leaking that much you should be able to see where it's coming from.
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Old 07-07-2014, 04:56 PM   #4
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thanks guys
no my oil doesnt smell of coolant i know that much
and i know where the leak is.
just trying to figure out why ol dahlia likes to crack radiators
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Old 07-07-2014, 05:42 PM   #5
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thanks guys
no my oil doesnt smell of coolant i know that much
and i know where the leak is.
just trying to figure out why ol dahlia likes to crack radiators
I've never owned a Mishimoto radiator, but have heard of inconsistent quality on the brazing for these over the years. I've replaced a number of TJ radiators with OEM style radiators and never had a problem. Much cheaper also.

After looking at their website they claim you need a special 19lb radiator cap as well.

http://www.mishimoto.com/mishimoto-radiator-caps.html
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Old 07-07-2014, 08:35 PM   #6
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I've never owned a Mishimoto radiator, but have heard of inconsistent quality on the brazing for these over the years. I've replaced a number of TJ radiators with OEM style radiators and never had a problem. Much cheaper also.

After looking at their website they claim you need a special 19lb radiator cap as well.

Mishimoto Radiator Caps & Fill Necks
yeah after the first one i had i started researching and read a bunch of reviews saying the same thing, but since i had a free replacement i thought id give them a second chance, o well on to the next, guess ill be overhauling the coolant system soon
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Old 07-07-2014, 08:45 PM   #7
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Your OE radiator lasted something like ten years, not sure exactly how long since you don't mention your TJ's model year... but that's a good track record... I would have gone with another Mopar radiator, many aftermarket radiators are shoddily made and fail prematurely.
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Old 07-07-2014, 09:57 PM   #8
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Your OE radiator lasted something like ten years, not sure exactly how long since you don't mention your TJ's model year... but that's a good track record... I would have gone with another Mopar radiator, many aftermarket radiators are shoddily made and fail prematurely.
thats a great point my man and yes shes an 02, the previous owner replaced it about 5 years ago so yeah i agree thats a good track record
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Old 07-07-2014, 10:15 PM   #9
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thats a great point my man and yes shes an 02, the previous owner replaced it about 5 years ago so yeah i agree thats a good track record
You are certainly impressed easily. By any reasonable standard, that's an abyssmal track record.
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Old 07-08-2014, 09:56 AM   #10
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You are certainly impressed easily. By any reasonable standard, that's an abyssmal track record.
i dont know man, for an stock radiator to last about 8 years driving coast to coast multiply times i think thats pretty decent, and for a full billet radiator to last only year is kinda sad, my question is what could be causing them to crack. could a old corroded heater core be adding to much pressure, is there anything to look for besides the radiator its self
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Old 07-08-2014, 07:55 PM   #11
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I had 3 all aluminum Drake radiators that all failed within one year. I went back to OEM and have had zero problems since (2 years so far).
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Old 07-08-2014, 10:09 PM   #12
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I had 3 all aluminum Drake radiators that all failed within one year. I went back to OEM and have had zero problems since (2 years so far).
Had a Drake and Griffen fail in months. Running Napa. Was out of necessity in Alaska at the time but it's impressed and cheap. So... Regret buying those "upgrades" ate it. Shipping and such is horrid in Alaska. Pos "upgrades" factory leaked for me at 30k but it was slow and stood like that until I replaced it. It wasn't the new kind though. It was plastic tanks clamped in bronze. New OEM is aluminum with plastic tanks like my Napa. Sure Ak weather was torture but I know what can take temp extreme now. Napa.
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Old 07-09-2014, 04:33 PM   #13
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Had a Drake and Griffen fail in months. Running Napa. Was out of necessity in Alaska at the time but it's impressed and cheap. So... Regret buying those "upgrades" ate it. Shipping and such is horrid in Alaska. Pos "upgrades" factory leaked for me at 30k but it was slow and stood like that until I replaced it. It wasn't the new kind though. It was plastic tanks clamped in bronze. New OEM is aluminum with plastic tanks like my Napa. Sure Ak weather was torture but I know what can take temp extreme now. Napa.
well i guess im going napa. thanks guys thanks

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