(9) Test the cylinder sleeve bore by inserting the feeler stock in several positions around the sleeve walls. Any
variation in roundness will be noted by increased or decreased weight readings.
i. Connecting Rod Bushing.
(1) To remove the connecting rod bushing from the connecting rod, press the bushing from the rod using a
suitable driver. Be careful not to nick or scratch the inside bore of the connecting rod.
(2) The phosphor-bronze connecting rod bushing (15, fig. 82) has been diamond bored at the factory. Press
the new bushing into the connecting rod using an arbor press.
(3) Ream the connecting rod bushing with a suitable reamer until the desired clearance is obtained.
j. Connecting Rod Bearings.
(1) The lower end of the connecting rod is fitted with thin steelbacked bearing shells (17, fig. 82) lined with
cadmium nickel. The machined notches in the connecting rod cap (39) are matched with the ears stamped
into the steel back of the bearing shells (17). When the bearing is assembled on the connecting rod, the
notches and ears lock the shells and prevent them from rotating in the connecting rod.
(2) When the bearing shells are assembled to the crankshaft, the bearing clearance is 0.0015 to 0.002 inch.
(3) If the shell wears out or becomes defective, it must be replaced. Never replace only half of a bearing shell.
Replacement must be made in complete bearing shell units. Because of the extremely close machining of
this bearing shell, no fitting, filing, scraping, boring, or other adjustment is required or permissible.
Note. Do not try to fit the bearing by scraping or filing the shell or connecting rod cap, or the
connecting rod will be permanently ruined.
k. Reassembly.
(1) Install the bushings in the connecting rods (see i above).
(2) Immerse the piston (12, fig. 82) in hot water (about 100 F.) and allow it to expand.
(3) Install the piston pin (13) in the piston (12) and connecting rod bushing (15).
(4) Install the piston pin retaining rings (14) in the grooves at each end of the piston pin (13).
(5) Clamp the connecting rod in a vise for installation of the piston rings.
(6) Spread the oil ring (8) with a piston ring spreading tool and install it in the bottom groove of the piston (12).
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