Section 05 ENGINE (4-TEC)
Subsection 08 (ENGINE BLOCK)
A
R610motr137A
A. Piston pin diameter in the area of the bushing
CONNECTING ROD SMALL END
DIAMETER mm (in)
NEW MINIMUM
23.01 (.9059)
NEW MAXIMUM 23.02 (.9063)
SERVICE LIMIT 23.07 (.908)
PISTON PIN DIAMETER mm (in)
NEW MINIMUM 22.996 (.9053)
NEW MAXIMUM
23.000 (.9055)
SERVICE LIMIT 22.990 (.904)
PISTON PIN BORE CLEARANCE mm (in)
SERVICE LIMIT
0.080 (.0035)
If the connecting rod small end diameter is out of
specification, replace connecting rod.
Connecting Rod Big End Radial Play
Measure inside diameter of connecting rod big
end. Compare to crankshaft pin.
To measure the connecting rod big end diameter,
use the OLD screws no. 11.
Install the OLD bushings no. 12 as they were
mounted initially.
Do the torque procedure as described below.
R610motr76A
A
A. Connecting rod big end bushing
CONNECTING ROD BIG END DIAMETER mm (in)
SERVICE LIMIT
45.080 (1.774)
CONNECTING ROD BIG END
CLEARANCE mm (in)
SERVICE LIMIT 0.09 (.0035)
Use NEW bushings no. 12, when connecting rod
big end diameter is out of specification.
Piston
Inspect piston for scoring, cracking or other dam-
ages. Replace piston and piston rings if neces-
sary.
Using a micrometer, measure piston at 18 mm
(.709 in) perpendicularly (90°) to piston pin axis.
290 smr2004-Complete Line Up
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