The Ford Barn - View Single Post - The Terry Burtz 5 main bearing engine blocks are back on track.

Terry Burtz, Calif · 04-15-2021, 10:46 AM

The National 415035 seal specified in the "Builders Guide" has a nitrile lip and is a commonly stocked part.

If you look on page 58 in the National Seal Catalog (https://www.timken.com/wp-content/up...talog_7707.pdf), you will find many seals for a 4-inch diameter shaft and a 5-inch diameter housing bore that will work in the "New Engine".

The 415035 seal is in bold type which means that it is readily available.

The 415953N, 455035N, and 455953N seals have lips made from Acrylates that can withstand higher temperatures than nitrile. These seals are not in bold type and have an asterisk next to their number. At the bottom of the page, the asterisk is explained as "Non-Stock Item, Special Order".

04-15-2021, 10:46 AM	#319
Terry Burtz, Calif Senior Member Join Date: May 2010 Location: Campbell,CA, USA Posts: 320	Re: The Terry Burtz 5 main bearing engine blocks are back on track. The National 415035 seal specified in the "Builders Guide" has a nitrile lip and is a commonly stocked part. If you look on page 58 in the National Seal Catalog (https://www.timken.com/wp-content/up...talog_7707.pdf), you will find many seals for a 4-inch diameter shaft and a 5-inch diameter housing bore that will work in the "New Engine". The 415035 seal is in bold type which means that it is readily available. The 415953N, 455035N, and 455953N seals have lips made from Acrylates that can withstand higher temperatures than nitrile. These seals are not in bold type and have an asterisk next to their number. At the bottom of the page, the asterisk is explained as "Non-Stock Item, Special Order".