Re: 38 Twelve. how to compress rings to install ?

Posted by Owen_Dyneto On 2017/12/25 23:54:20

Really no surprise you didn't find torque specifications in Packard's service literature, though the concept of a torque-measuring wrench goes back to the late 20s, it really wasn't until just a year or two before WW II that the wrenches became commercially available in quantity and manufacturers began to issue specifications. Motor's Manual, a very highly respected independent auto service manual, lists 65-70 lb-ft. for the main bearing bolts. It does not make a recommendation for the rod bearings.

If one wished to guesstimate a torque value for the rod bearing retaining nuts, rather than using bore and stroke of another Packard engine as a basis for extrapolation, I'd think using bearing journal diameter and bolt diameter and thread count would be more appropriate.