Re: Motor rebuild questions

Posted by flackmaster On 2017/3/30 9:34:30

Dave - I know I am shooting from the hip here...and believe me, I am NOT an expert on the 320 motors, but...
I do believe the later rods will serve as an updated replacement, primarily to take advantage of the insert bearings, and second, my recollection is the parts book difference is that replacement rods were supplied with the pin bushing installed, which is offset to one side. ...and I also have a brain cell buzzing to explain that the centerline of the rod neck is slightly offset, which is why you simply cannot turn a rod over to account for the bushing offset.
Would someone please chime in to clarify this....

And with all the effort and cost to change to the later rods, why not just have the original rods re-babbitted? Folklore suggests its the quality of the babbitt that is of issue, but there are so few shops now doing babbitt, the amateurs have been pretty much weeded out.

DAF

...and for purely self serving purposes, i have a set of later rods available.