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Old 09-17-2018, 11:01 PM   #3
Kurt in NJ
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Join Date: May 2010
Location: on the Littlefield
Posts: 6,159
Default Re: Model A engine cam bearing dimension

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I have max clearance .003 from service bulletins

new cam diameter of 1.560 ---from bill stipe site

a low mileage block that I took apart that still has machining marks has .0015 clearance with original cam that shows no wear

a center cam bearing with .005 clearance has the same "open" cross section as the oil feed to the valve chamber ----
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