7. CYLINDER/PISTON Downtown 300i ABS
Measure the piston pin O.D.
Service Limit: 16.994 mm replace if
below
Measure the piston O.D.
Take measurement at 9mm from the
bottom and 90° to the piston pin hole.
Service Limit: 72.70mm replace if below
Measure the piston-to-piston pin
clearance.
Service Limit: 0.02mm replace if over
CYLINDER INSPECTION
Inspect the cylinder bore for wear or
damage.
Measure the cylinder I.D. at three levels
of top, middle and bottom at 90° to the
piston pin (in both X and Y directions).
Service Limit:
72.70 mm repair or replace if over
Measure the cylinder-to-piston clearance.
Service Limit:
0.1 mm repair or replace if over
The true roundness is the difference
between the values measured in X and Y
directions. The cylindricity (difference
between the values measured at the
three levels) is subject to the maximum Top
value calculated.
Service Limits:
True Roundness: Middle
0.05mm repair or replace if over
Cylindricity: 0.05 mm repair or replace if Bottom
over
7-5
4.7 / 5