I have a very small, "weeping type", water jacket leak from the engine block near the casting date. Does anyone have a suggestion on how to stop the leak. Should I use an additive to the water such as "radiator stop leak"? Any help would be appreciated. Thanks!
Try some stop leak. Aluma-Seal. Or, ignore it. Mine weeps there too, but never leaves a drop on the pavement. I leave it alone, it leaves me alone.
Use a dab or two of JB weld over the leak. Or just let it alone.
Is it the water jacket or head gasket ??
Mine weeps from the same spot
My experience indicates radiator stop leak depends on the pressure in the radiator to push it into the leak sealing it. It seems a T with non pressurized cooling system will not get much benefit from a stop leak type additive. If you can find the leak from the inside of the block, a good cleaning might let a capable welder put a little braze on the flaw fixing it for good.
Drain the coolant, keep wiping the leak a few times each day until the surface stays dry, then clean the area with alcohol and give it a skim coat of Ultra Black. Allow a full 24 hours to cure, then refill the cooling system.
Mark, have you sealed a crack with the ultra black? and did it hold up? my 26 rpu weeps at the rear of the block athead and has for several years. It gives no problems but I hate the leak. Thanks in advance..
Yes. Since the T cooling system isn't pressurized, Ultra Black can work if the surface is dry and clean when you apply it and you allow it to cure completely before refilling the cooling system.
Thanks everyone for your response and advice. John
Mark thanks I drained the coolant tonight the previous owner forgot to tell why it was low on fluid of course. That's ok it's a great driving T and I will use the ultra black. Tim