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Old 09-26-2013, 05:36 PM   #1
Join Date: Feb 2013
Posts: 13
Radiator leak, how to patch?

Got a 98 TJ, 6 cyl. I've got a small leak in the upper corner of the radiator. I've put Bar's leak stop in the radiator and that didn't work. I've also tried cover the hole with JB Weld and it still leaks.

I'm trying to find a cheap way to patch the hole until I've got the funds to replace the radiator. Anybody know of anything I could spray on the radiator in that corner to stop the leak?

Appreciate the comments.


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Old 09-26-2013, 05:40 PM   #2
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my buddy used gorilla glue when he busted his on a trail .... and we covered that with duct tape .

97 #1 TJ 4.0 5spd - built,beat,rolled,totaled,stripped, and SOLD

97 #2 TJ 4.0 5spd and some stuff from - savvy, rokmen, corbeau, a-z fab, rock hard 4x4,metal cloak, and others ....slowly building it up

06 Civic - tint + 36mpg
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Old 09-26-2013, 05:40 PM   #3
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Honestly, ya just gotta replace the radiator. If funds are low, try a junk yard TJ radiator as a temp fix. None of the temp fixes will last more than a few days at most, and makes a mess for your waterpump, thermostat, and heatercore.
'99 Chili Pepper TJ - I4 PowerTech motor
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Old 09-26-2013, 05:40 PM   #4
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Due to the pressure of the radiator there really isnt going to be anything that'll stop the leak for you...

cheapest way would be to go to a u-pull yard and find a radiator that you could swap in but best way would of course be a new one.

They're not that expensive and if you took a little time to replace it you could do it yourself and save more cash as well.

Good luck, man.
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Old 09-26-2013, 05:41 PM   #5
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If it is leaking from the tubes you can cut and crimp or braze the leaking tubes.

That bars crap is horrible for your coolant system. Be prepared for future problems.

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Old 09-26-2013, 07:15 PM   #6
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A. Get a used one from a junk yard
B. Take your leaking one to get fixed. If it can be fixed.
C. Buy a new one.

I dont know what the quality is or how long it will last, but here is one on ebay for $60.72 + free shipping. Brand New High Quality Radiator Jeep TJ Wrangler 2 4 2 5 4 0 4 2 L6 L4 at MT | eBay
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Old 09-26-2013, 10:16 PM   #7
Join Date: Jun 2013
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Look at it this way-if you think you are saving money patching it to get by-if it pops and cooks your motor-how much do you think that will cost? or it it pops and you do shut it down it time-the tow bill will be about the same (maybe more) than the cost of a new radiator. And flush that stop leak junk out, now you will be forced to flush the system before putting coolant and DISTILLED water back in.
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Old 09-27-2013, 11:24 PM   #8
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Thanks for the feedback fellas. I will be getting a new radiattor and flushing the system out.
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Old 09-28-2013, 02:33 PM   #9
Knows a couple things...

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Make sure when you add water to the coolant for its 50:50 mix to ONLY use distilled water like you can buy by the gallon at your grocery store. Tap water is high in mineral content which will eventually clog a radiator with hard water deposits.

When you have a choice, buy American.

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