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Radiator Stop Leak Recommendation #4441333
06/25/17 04:51 PM
06/25/17 04:51 PM
Joined: Oct 2012
Posts: 339
North Carolina
Egg_Head Offline OP
Egg_Head  Offline OP
Joined: Oct 2012
Posts: 339
North Carolina
My 1979 Jeep CJ-7 w/304 V-8 appears to have a slight coolant leak at the seam towards the bottom, 10 drips on the garage floor after 1 week of not driving. Radiator is the original Blackstone and I believe it is brass. Jeep has 38k original miles and I am driving it to the beach next Friday, trip is about 4 hours. I am willing to roll the bones and try some stop leak, any recommendations? Bars has about 4 different products for this, thanks.


1979 Garelli Rally Sport
2009 Cub Cadet LT1042
2002 BMW 540 M Sport (totaled)
2011 MB E350 4Matic wagon
1979 CJ-7
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441342
06/25/17 04:57 PM
06/25/17 04:57 PM
Joined: Jan 2011
Posts: 1,066
Columbus Nebraska
old1 Offline
old1  Offline
Joined: Jan 2011
Posts: 1,066
Columbus Nebraska
Although probably most people will say don't use any, just fix it, If you are going to use a stop leak, I would use the Bars leaks pellets or powder, or the pelletized stuff. I think it is all mostly the same ingredient. Just don't use the aluminized stuff. I personally have used all that I mentioned, and found it to work pretty good and cause no problems.


2017 Nissan Frontier 4.0 5w30
1965 Mustang 200 c/4 10w30 QS defy
1964 Ford Ranchero 302 c/4 15/40 Delo
1929 ford model A No filters, and 15/40 oil
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441344
06/25/17 04:58 PM
06/25/17 04:58 PM
Joined: Sep 2004
Posts: 7,828
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,828
Marshfield , MA
Use the pellets not the aluminum powder


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441347
06/25/17 05:04 PM
06/25/17 05:04 PM
Joined: Jul 2016
Posts: 1,702
Jacksonville, FL
FlyNavyP3 Offline
FlyNavyP3  Offline
Joined: Jul 2016
Posts: 1,702
Jacksonville, FL
Bars leak pellets or tablets have worked for me on many occasions. I've also had excellent luck with the GM radiator pellets from the parts counter.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441351
06/25/17 05:06 PM
06/25/17 05:06 PM
Joined: Jul 2009
Posts: 432
Seattle
Superflop Offline
Superflop  Offline
Joined: Jul 2009
Posts: 432
Seattle
Yeah the gm/ac delco stop leak tablets


2002 saab 9-5 2.3t wagon
2014 dodge grand caravan
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441353
06/25/17 05:07 PM
06/25/17 05:07 PM
Joined: Oct 2011
Posts: 1,460
CA
user52165 Offline
user52165  Offline
Joined: Oct 2011
Posts: 1,460
CA
Free rental of pressure tester from AZ. Find out exactly where the leak is. A good handyman could solder it if brass. Those band aids you propose do more harm than good. Been there done that.

Last edited by user52165; 06/25/17 05:08 PM.
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441357
06/25/17 05:11 PM
06/25/17 05:11 PM
Joined: Aug 2014
Posts: 1,453
Gulf Coast, MS
3800Series Offline
3800Series  Offline
Joined: Aug 2014
Posts: 1,453
Gulf Coast, MS
K-Seal perhaps? I know some people who has had success with it and it's not one of those types of sealers that just harden at the top of the radiator. I've used there product once when I was going up to Iowa recently. Car hit a deep pot hole out of no where and the water pump was pouring water very quickly.

We where about half way and I tried it since I heard some good stuff about it in the past. Sure enough it solved the problem in about 35-45 mins and the thing stopped leaking and got me to Iowa where I was able to replace the pump and gasket correctly.

I read a lot about it at the time and it's suppose to be mainly a chopper, fiberglass??, and epoxy mix that cure on contact with air instead of just melting when it's hot and gets clogged in the leak over time.

I guess the best thing about it is it can be kept in the system and is safe for the heater core since it only cures after prolonged contact with air and doesn't require the system to be flushed out afterwards.

Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441372
06/25/17 05:29 PM
06/25/17 05:29 PM
Joined: Apr 2014
Posts: 1,898
Spring,Texas
Bud_One Offline
Bud_One  Offline
Joined: Apr 2014
Posts: 1,898
Spring,Texas
+1 for the pellets , they've fixed a couple of vehicles of mine in the past that had slight coolant leaks.


16 Civic-QSUD 0W-20, XG7317
14 Civic-Idemitsu Zepro 0W-20, XG7317
05 Chevy 2500HD-QSUD 10W-30, XG3675
97 Accord Wagon-Havoline ProDS 10W-30, TG7317
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441380
06/25/17 05:39 PM
06/25/17 05:39 PM
Joined: Mar 2004
Posts: 21,123
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 21,123
Upstate NY
A brass radiator can be fixed by a radiator repair shop (if they still exist).


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441381
06/25/17 05:41 PM
06/25/17 05:41 PM
Joined: Aug 2010
Posts: 12,910
Northern Kentucky
901Memphis Online content
901Memphis  Online Content
Joined: Aug 2010
Posts: 12,910
Northern Kentucky
Yup should be a good candidate for an actual repair


2012 Chevy Cruze LT 1.4T - 59k - Edge 0w30 SL + Mahle OX401D
2002 Buick Century 144k - Built 4T65e(Maxlife) - GTX 5w30 + Fram XG3980
Re: Radiator Stop Leak Recommendation [Re: Donald] #4441383
06/25/17 05:47 PM
06/25/17 05:47 PM
Joined: Oct 2012
Posts: 339
North Carolina
Egg_Head Offline OP
Egg_Head  Offline OP
Joined: Oct 2012
Posts: 339
North Carolina
Getting the OE radiator repaired is my ultimate goal. There is a great family owned, old school radiator repair shop in my town. I'm traveling this week and will not have time to get that taken care of prior to the road trip. I have AAA 100 mile tow service if the stuff hits the fan, part of the adventure.


1979 Garelli Rally Sport
2009 Cub Cadet LT1042
2002 BMW 540 M Sport (totaled)
2011 MB E350 4Matic wagon
1979 CJ-7
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441412
06/25/17 06:12 PM
06/25/17 06:12 PM
Joined: Mar 2008
Posts: 7,347
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 7,347
USA
aluma-seal is good stuff, available as both a liquid and as a powder thumbsup

Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441433
06/25/17 06:47 PM
06/25/17 06:47 PM
Joined: Nov 2004
Posts: 7,806
Texas
GMBoy Offline
GMBoy  Offline
Joined: Nov 2004
Posts: 7,806
Texas
Great Jeep! I have a similar one but a 1978.

Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441440
06/25/17 06:58 PM
06/25/17 06:58 PM
Joined: Nov 2006
Posts: 20,594
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,594
MA, Mittelfranken.de
Bars Leak or GM tabs or Subaru sealer only no metallic sealers. The metallic ones will plug an older system up quicker than you can think about it.
The products mentioned use ginger root as the main ingredient, it shrinks when when and only expends wet in the presence of air so it basically just roams around waiting for a leak without doing any damage, OE manufacturers use this formula in some of their problematic engines.

The GM and Subaru ones are available from any dealer, for a V8 GM makes a larger packet and 2 bottles of the Subaru stuff.

https://www.walmart.com/ip/Bar-s-leaks-R...13=&veh=sem

https://www.amazon.com/Genuine-3634621-Cooling-System-Tablet/dp/B000QIH3C4

https://www.amazon.com/Subaru-SOA635071-Coolant-System-Conditioner/dp/B00IGZP2UE


ASE L1, Master. Deutsch Meisterbrief.
Re: Radiator Stop Leak Recommendation [Re: Egg_Head] #4441447
06/25/17 07:13 PM
06/25/17 07:13 PM
Joined: Oct 2008
Posts: 12,654
The Old North State
Sayjac Offline
Sayjac  Offline
Joined: Oct 2008
Posts: 12,654
The Old North State
Edit. Trav's got it covered. Bar's Leak Stop Leak Tabs or ACDelco tabs also my recommendation.


Last edited by Sayjac; 06/25/17 07:23 PM. Reason: Change post to reflect a prior reply
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