Strange 351C Crack Location?

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Fast1972

New member
Joined
Dec 22, 2024
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Location
Valencia Ca
My Car
1972 Mustang
Howdy folks,
Wondering if I could borrow your collective knowledge for a bit.

I've recently gotten a coolant drip from under my mustang (1972, 351C, 4 speed toploader) when it gets up to temperature, when coolant is pressurized.

Crawling under the car it looks like drips of coolant are appearing near the driver side coolant drain plug. It looks like it SHOULD be coming from the plug, but i have resealed/retaped it twice and still have the leak. And there seems to be about 1/8th in between the threads and where the water droplet starts.

Has anyone ever seen a cleveland crack from this plug? Or am I just not sealing this plug right?

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