1-66 Engine Mechanical Industrial 1.6L
Measure
1. The con–rod bearing journal diameter is measured with a
micrometer at points I and II and then calculated.
Formula for calculating the average con–rod bearing jour-
nal diameter: I + II
2
Example:
I 42.729 mm
II + 42.725 mm
85.454 mm / 2 = 42.727 mm
The average con–rod bearing journal diameter is 42.727
mm.
The con–rod bearing clearance is calculated from the dif-
ference in diameter between the con–rod bearing bore and
the con–rod bearing journal.
Example:
Avg. con–rod bearing dia. 42.737 mm
Avg. con–rod bearing journal dia. - 42.727 mm
0.010 mm
Permissible con–rod bearing clearance: 0.019 to 0.071
mm.
Piston, Replace
Notice: Removal of the piston pin is not permitted. If the
piston, the piston pin or the con–rod is defective, all
above–mentioned parts must be replaced.
Removal Procedure
1. Remove piston with con–rod (1) – see operation Piston
with Con–rod, Remove and Install.
Installation Procedure
1. Coat con–rod eye and upper part of the con–rod shaft
with thermocolor pencil. The green coloring turns black
when the required assembly temperature is reached. The
colored mark (arrow) is not permitted to discolor over the
entire length, but only up to the start of the con–rod shaft.
Heat new con–rod at upper con–rod eye with heater plate.
Assembly temperature: 280 °C / 536 °F to max. 320 °C /
608 °F.
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