Connecting rods
Big-end thrust clearance:
Check the big end of each connecting rod for thrust clearance,
with the rod fitted and connected to its crank pin in the normal
manner. If the clearance measured is found to exceed the limit,
the connecting rod or the crankshaft, whichever is responsible
for the excessive clearance, must be replaced.
Connecting rod alignment:
Mount the connecting rod on the aligner to check it for bow and
twist and, if the limit is exceeded, replace it.
Inspect the small end of each connecting rod for wear and evi-
dence of crack or any other damage, paying particular attention
to the condition of its bush. Check the piston pin clearance in the
small end. Replace the connecting rod if its small end is badly
worn or damaged or if the clearance checked exceeds the limit.
Connecting-rod big end bearings
Inspect the bearing shells for signs of fusion, pitting, burn or flak-
ing and observe the contact pattern. Bearings found in defective
condition through this inspection must be replaced.
CAUTION:
Bearing shells are not meant to be repaired by scrap-
ing or grinding with sandpaper or by any machining.
The remedy is to replace them.
6A-28
ENGINE MECHANICAL (F8B ENGINE)
Item
Standard
Limit
Big-end thrust clearance
0.10 – 0.20 mm
(0.004 – 0.008 in.)
0.30 mm
(0.012 in.)
(1) Width of big end
21.95 – 22.00 mm
(0.864 – 0.866 in.)
(2) Width of crank pin
22.10 – 22.15 mm
(0.870 – 0.872 in.)
Limit on bow
0.05 mm (0.002 in.)
Limit on twist
0.10 mm (0.004 in.)
Item
Standard
Limit
Pin clearance in small
end
0.003 – 0.016 mm
(0.0001 – 0.0006 in.)
0.05 mm
(0.0020 in.)
Small-end I.D.
16.003 – 16.011 mm
(0.6300 – 0.6304 in.)
Piston pin dia.
15.995 – 16.000 mm
(0.6297 – 0.6299 in.)
