Reply to "Oiling system mods"

bosswrenchMember

The sleeved lifter bores fix most of the oiling deficiencies in a 351C. The verticle hole in each main bearing web only blocks off oil to the cam bearing directly above; your rebuilder may have decided to not do them for whatever reason. Those drillings typically are plugged with varnish just below the cam bearing anyway, and changing cam bearings in a Cleveland is much more difficult than on most other engines. #5 main has a 3-way oil drilling- the verticle one is for the rear cam bearing, the rt drilling is for the pssenger lifter bores that you have fixed by sleeving. So your rebuilder didn't go all the way with the restrictors, but the possible gains are pretty small.

8/27/038:25 PM

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