Posted by TheOldHokie on January 08, 2011 at 07:41:51 from (71.176.135.226):
In Reply to: Ford 8n Cam Bearings posted by Bob Harvey on January 03, 2011 at 06:15:01:
Quoting Removed, click Modern View to see
I would not be surprised to learn your old cam bearings were made undersize to fit a reground camshaft and that is why they do not fit your new stock cam. The OD on the OEM cam bearings for the Ford 239/255 CID flathead V8 (Clevite SH-21S) is 1.9275/1.9285. If that is the same or larger than the ones that you took out I would suggest you go with the OEM bearing. It's a standard bearing readily available for a modest price and should work perfectly in this application. If the ones in your block are smaller you will have to have it line bored for the OEM bearing. If the OEM bearings are too small there is no need to make new ones to replce what you already have - simply line bore the old ones to get them to fit the new cam. If you had new ones made you would still have to line bore them after installation. If you can use the OEM bearings next time it's just R&R the bearings :roll:
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