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Connecting Rods, Bearings, and
Bushings
Measuring connecting rod bushing inside
diameter
Measure the inside diameter of each bushing in two
directions and on two locations(see picture). If the
service limit is exceeded, replace the bushing.
Connection rod bushing inside diameter, mm [in.]
Normal value ............. Ø70 [2.76]
Assembly standard ... 70.020–70.040 [2.75669–2.75747]
Service limit .............. 70.070 [2.75866]
Replacing connecting rod bushings
1. Use the Connecting rod bushing installer(A) to re-
move(1) the bushing for replacement as shown.
2. When installing a new bushing(2), align the oil
holes in the bushing and connecting rod.
3. After installing the bushing, measure it and ream
to correct size if necessary. Insert the piston pin,
and make sure that the pin rotates freely without
rattling.
Connecting rods bend(1) and twist(2)
Measure C and L. If the measurement at C is larger
than 0.05 mm [0.0020 in.] per 100 mm [3.9 in.] of L,
straighten the rod with a press
NOTE! To inspect for bend and twist, install the cap
to the connecting rod, then tighten the cap bolts to the
specified torque.
To inspect the rod bend when assembled with the
piston, place the piston on a surface plate. Insert a
round bar of the same diameter as the crank pin into
the big end bore, then measure heights A and B of
the bar.
Connecting rod bend C/D, mm [in]
Assembly standard ... 0.05/100 max. [0.0020/3.9]
Group 21 Engine Body
101
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