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post #173 of Old 04-08-2013
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Re: Perkins 4.108M DIY Rebuild -- A Narrative

More info on oblique cut connecting rod caps:

Because of the large diameter of the crankpin to increase bearing area and decrease bearing load, the width of the bottom end of the con rod is greater than the diameter of the cylinder liner.

So that the piston can be withdrawn from the liner, 3 different designs are used:

The con rod can be fitted with a marine palm as in the photo above.

The con rod can be split in two parts as shown opposite.

The bottom end can be split obliquely. Serrations are used to locate the two halves relative to one another.
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