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hole in block?

2K views 5 replies 4 participants last post by  steelybill 
#1 ·
Any idea what this is? The hole is the bolt closest to the oil pan by the freeze plug. We were cleaning the engine and I think it was packed with dirt and whatever and it started dripping coolant. We stuck a short bolt in but I don't think it's threaded much if at all. Any ideas on what it is and what to do? It's still oozing. Safe to maybe add some sealer to the bolt? I believe this is a 73 472 that I'm dropping in my 78. Hole is on the passenger side

Thanks
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