Ford 172 block question

Ncwellman · Jan 29, 2023

I am in the process of installing a new engine on my Ford 850. My old block was bad and I found a replacement. I just got it back from the machine shop and noticed something. The replacement block has a "circle" on the block surface that is not found on my old block. It goes into the water jacket near where the water pump mounts. There is no corresponding hole in the head or in the head gasket for it either. See the pictures below. Does anybody know what it s for? I scanned a few pictures online and noticed some blocks have it and some blocks don t. Is this something I need to be worried about? This is my go to site for information and I figure somebody here will have some insight.

Ncwellman · Jan 29, 2023

Here is a picture of the hole in the surface and below is the old one

Ncwellman · Jan 29, 2023

This post was edited by Ncwellman on 01/29/2023 at 11:08 am.

shaun wallace · Jan 29, 2023

Scrape that old gasket off and that hole will be there. Put head gasket on head and there is several holes that go no where.

showcrop · Jan 30, 2023

This question comes up about other blocks.

Ford 172 block question

Ncwellman

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Ncwellman

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shaun wallace

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showcrop

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