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Terry Burtz, Calif · 09-09-2019, 12:45 PM

That would be like saying the engine cylinder cases (blocks) were bored to 3.8735" in size. While that is accurate statement, that was not the finished bore size after honing.

Per Ford drawing A-6015 (April 1929), the cylinder bore was specified to be reamed to 3.873 to 3.874 inch diameter, and then rolled to 3.875 to 3.876 inch diameter. There is no mention of boring or honing.

09-09-2019, 12:45 PM	#23
Terry Burtz, Calif Senior Member Join Date: May 2010 Location: Campbell,CA, USA Posts: 420	Re: babbit tolerance? .000? That would be like saying the engine cylinder cases (blocks) were bored to 3.8735" in size. While that is accurate statement, that was not the finished bore size after honing. Per Ford drawing A-6015 (April 1929), the cylinder bore was specified to be reamed to 3.873 to 3.874 inch diameter, and then rolled to 3.875 to 3.876 inch diameter. There is no mention of boring or honing.