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#1 |
Registered User
![]() Join Date: Apr 2001
Location: Beavercreek, Ohio 45431
Posts: 737
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Anyone ever use Bar's HD Stop Leak?
Actually its called Bar's Leaks Radiator Heavy Duty Stop Leak.
I found a small leak in the radiator. Not sure I want to pull it right now. Any negative side effects using Barr's? I'm not so worried about the radiator, as it may be replaced later, but I do wonder if it will cause any problems inside the engine (i.e. clogging water jacket/ports) over time. Any information, as always, is greatly appreciated.
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1967 K30 461/TH400/Np205/D60/14FF/BDS MTZ 375/75/16 on 16x10 Pro Comps |
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#2 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,922
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Re: Anyone ever use Bar's HD Stop Leak?
I wouldn't do it. It's going to end up in your heater core and everywhere in the engine.
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#3 |
Senior Member
![]() Join Date: Oct 2013
Location: Garden City, GA
Posts: 296
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Re: Anyone ever use Bar's HD Stop Leak?
Maybe in an emergency just to get you home, but the leak will return quickly and then you've got contaminants in your cooling system.
I would advise against it. |
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#4 |
Registered User
![]() Join Date: Apr 2013
Location: Gainesville, TEXAS
Posts: 658
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Re: Anyone ever use Bar's HD Stop Leak?
Use it, all the big manufacturers use it, it doesn't clog up anything but the holes.
It's a little preventive that can fix problems before they become problems.
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1972 Chevrolet Cheyenne LB 1/2 ton finished restoration/rebuild 1995 350 throttle body FI, 4L6E (running on modified GM wiring harness) 3.08 posi rearend, factory A/C on 134A, p/s, p/b, late 70's power windows and locks and cruise, speakers in the dash + 6x9's behind the seat, factory tilt, 40 gallon fuel tank in the bed with integrated tool box, air assist bags on the rearend, sway bar up front and much more. 1972 chevrolet SNB finished 2002, 350 TB FI, TH400, factory A/C, p/b, p/s, (FOR SALE) 1969 Chevrolet 1 ton in work, home made PTO dump bed extended frame, 350 CI , 1972 Chevrolet 3/4 ton suburban future project 1972 Chevrolet 3/4 ton p/u maybe a project one day 1966 Toyota Landcruiser my playtoy |
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#5 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,006
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Re: Anyone ever use Bar's HD Stop Leak?
X2. I remember using it growin up, it does work.
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#6 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Anyone ever use Bar's HD Stop Leak?
I've used it on emergencies but it's definitely not a permanent fix. Probably won't clog jackets inside the engine but it will leave deposits inside and in the radiator.
If it's not an emergency, I would take it off and have a radiator shop look at it. I've had several radiators soldered in the past. Fairly inexpensive work. Last one was a 2 core and charge was $40 for solder, pressure testing and cleaning. If you do use the bars leak and replace the radiator later, flush the engine out real good.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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#7 |
Proprietor of Dale's Corner
![]() Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,130
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Re: Anyone ever use Bar's HD Stop Leak?
The manufacturers use it on new vehicles and I put it in as preventive measure on all of mine. I have never had a problem with anything clogging
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man |
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#8 |
Registered User
Join Date: Oct 2009
Location: canton ga
Posts: 12,728
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Re: Anyone ever use Bar's HD Stop Leak?
I have used it before and would again ,no problems at all .
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#9 |
Registered User
Join Date: Jan 2013
Location: Rye Colorado
Posts: 43
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Re: Anyone ever use Bar's HD Stop Leak?
X2, Used it growing up and never had a problem, I probably wouldn't put it in a high dollar high performance motor / radiator ,but for everyday driver yes
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39 GMC pickup,70 GMC K1500 short bed 4x4 ,72 K10 short bed step side 4x4 ,71 short bed fleet side , 72 K20 long bed ,74 K10 long bed , 69 C30 dump bed dually, 79 K30 standard cab dually , 02 Dodge 4x4 dually |
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#10 |
Senior Member
![]() Join Date: Jan 2000
Location: Arlington, VA
Posts: 398
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Re: Anyone ever use Bar's HD Stop Leak?
I had an experience with a leaking radiator with my Colony Park Wagon one third of the way through a 6500 mile roadtrip from Arlington, VA to New Mexico and back.
I did three things to maintain enough coolant to function the way home. 1. went to the first old looking auto parts store and bought the lowest pressure Radiator cap they had and put that on the car. 2. went to the supermarket and bought a package of ground black pepper (2 or 3 oz.). Poured half of the bottle into the radiator while car was running. 3. Checked coolant level daily at start of day until i returned to Arlington. The ground pepper would get stuck trying to escape through the pinhole leaks. doesn't stick to the coolant passageways. Flushes out fairly easily when you finally fix theat leak. |
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#11 |
Registered User
Join Date: Feb 2008
Location: Tacoma Washington
Posts: 890
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Re: Anyone ever use Bar's HD Stop Leak?
Any of the modern stop leaks work well and if brand new cars get it, I'm sure you'll be ok.
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I know a guy who's addicted to brake fluid. He says he can stop any time. 72 K10 396 75 Cj5 MPI 350 Chev 67 Chevelle 396, 4 speed 74 FXE 08 Tahoe |
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#12 |
Registered User
![]() Join Date: Feb 2014
Location: West Iowa
Posts: 1,106
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Re: Anyone ever use Bar's HD Stop Leak?
I have been told the major manufacturers use it preventive leaks in cast iron pin holes, slight casting imperfections, hose/fitting problems. Follow the Bar's Leak instructions. Should be no problem, just avoid the temptation to do the "5 can dump" in the cooling system. Too much of a good thing is not a good thing. With that said, a reputable repair with solder or possibly a re-core is the long term solution. Bruce
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#13 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,219
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Re: Anyone ever use Bar's HD Stop Leak?
I have used it for years & never had any problems. It works good. I would not use the HD if its just a small leak on a regular sized system. No use putting in more then necessary.
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#14 |
Registered User
![]() Join Date: Apr 2001
Location: Beavercreek, Ohio 45431
Posts: 737
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Re: Anyone ever use Bar's HD Stop Leak?
Okay, I decided to pull the radiator and have it repaired the right way and just keep the stop leak for any road emergency that may come up.
Thanks for all the advice guys. I think it would be fine to use but I have the time and resources to have it "boiled and brazed" so I'd better do that.
__________________
1967 K30 461/TH400/Np205/D60/14FF/BDS MTZ 375/75/16 on 16x10 Pro Comps |
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#15 |
Registered User
![]() Join Date: Jul 2009
Location: Houston, Tx
Posts: 1,133
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Re: Anyone ever use Bar's HD Stop Leak?
I havent used the Bar's but gm has one you can get at the dealer. worked great for me.
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1972 SWB Medium Olive South Houston Instagram: Antbish84 |
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#16 |
Registered User
Join Date: Feb 2011
Location: North Carolina
Posts: 993
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Re: Anyone ever use Bar's HD Stop Leak?
Used it three months in my c10 I was fixing up to sell...but ended up as a gas sipper DD, not ever had any issue...but on high HP or tq motor....mehhh be careful, im aware manufacturers use it, but...who knows...ya know?? Good luck and hopefully you can fix the leak!!
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#17 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,440
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Re: Anyone ever use Bar's HD Stop Leak?
As has been mentioned, black pepper is a good short-time solution, This will get you to the radiator shop, is all. You found the proper solution all by yourself. In the past, I have used and recommended "AlumaSeal" as a temporary sealer.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#18 |
Registered User
Join Date: Jan 2014
Location: Stigler,OK
Posts: 125
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Re: Anyone ever use Bar's HD Stop Leak?
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#19 |
Registered User
Join Date: Jul 2012
Location: Ft Wayne Indiana
Posts: 1,204
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Re: Anyone ever use Bar's HD Stop Leak?
It's been in mine for about a year and no problems. They seem to have fixed it so it doesn't clump up lol
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71 K20 64 GMC mud truck |
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