Stop Leak

Yes, but I do not like doing it. It tends to leave some gumminess to the cooling system. I like K-Seal when I use the stuff.
 
When I must use it I like black pepper. Depending on your leak a couple spoonfuls should do it. When you fix the leak later it washes right out, it's definitely my go to for anything with a heater core.

Sent from my E6810 using Tapatalk
 
My engine rebuilder said to put 1/2 of a vile of stop leak in the radiator, helps to seal the head gasket ! I didn't have a leak or seep.
 
My radiators are mostly old originals and of course some leak from the core mostly now and again . Some are drip.drip drip drip style . I use BARRS Stopleak which I think is USA made and works every time . My sons 31 coupe had a good leak just prior to the big Pendine Beach speed trial weekend just finished . 750 mile round trip BARRS to the rescue no leaks yet stopped at his sister in Bath overnight and 250 miles to go for home . I never ever had any nasty sticky side effects from this product(made in USA !!!) Says on the bottle helps to lube waterpump cant be bad .

John in Suffolk County England .
 
I have used oatmeal in a pressurized radiator as a stop leak. Removing the radiator cap resulted in a geyser of cooked oatmeal all over the engine compartment and me. This was in a 54 Packard. POS car, IMO.
 
Are you leaking fluid somewhere?? If not I would leave it alone.
If needed I would use Alumaseal NOT Barr's. JMO
Paul in CT
 
Yes i have a leak. Poured some water in it the other day and a stream was trickling out from the top right section. I have a video but cant post it
 
Years ago back in the mountains hunting turkeys our old Jeep radiator sprung a leak. We stopped in a country store. We asked the owner, whom we knew, if he had any radiator stop leak. Yes, three different brands but I won’t sell you any of them, he said. He sat a can of black pepper on the counter. Pour this in and leave the cap loose and by the time you get to the top of the mountain the leak will stop. We drove that thing for years like that and it never did leak anymore. We asked him later why he stocked the other stop leak brands. Those are for the tourists, he said. They wouldn’t believe you about the pepper, he said.
 
My 28 original radiator had a small wet spot in the upper left. Wish I knew for sure what I used, but it may have been Alumaseal. Anyway it sealed it up and never leaked again, even after cleaning my cooling system by using only vinegar for a month.

Unfortunately I think the fire did it in though, as I see solder where it shouldn't be.
 
For many years I have been using Bar's pelletized stop leak instead of anti-freeze in the cooling systems of both my Model A's. Bar's has a water pump lubricant. The only negative is it makes the water look rusty brown.
I live on Long Island where we have a significant winter, and not once has the water coolant frozen. Bar's does not require periodic replacement like anti-freeze. Bar's is much less expensive and it has a small jar convenient for carrying as a spare.





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Bar's
 
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