Connecting–Rod Big End Bearings - Suzuki F6A Service Manual

Connecting–rod Big End Bearings
S
Inspect bearings for signs of fusion, pitting, burn
or flaking and observe the contact pattern. Bear-
ings found in defective condition through this
inspection must be replaced.
!
CAUTION
Bearings are not meant to be repaired by scrap-
ing or sanding with sandpaper or by any
machining. The remedy is to replace them.
72
S
Crankpin to bearing clearance:
Check this clearance by using gaging plastic
(Plastigage). Here's how to use gaging plastic:
1) Prepare by cutting, a length of gaging plastic
roughly equal to bearing width a place it axially
on crankpin, avoiding the oil hole.
2) Make up the big end in the normal manner,
with bearings in place and by tightening the cap
to the specification.
NOTE:
Never rotate crankshaft or turn rod when a piece of
gaging plastic (Plastigage) is in the radial clearance.
Bearing cap tightening torque
NOTE:
When fitting bearing cap to crankpin, be sure to dis-
criminate between its two ends.
3) Remove the cap and measure the width of flattened
gaging plastic piece with the gaging plastic envelope
scale. This measurement must be taken at the widest
part.
Item
Crankpin–to–
0.020–0.040 mm
bearing clear-
(0.0008–0.0016 in.)
ance
31–35 N–m
3.1–3.5 kg–m
22.5–25.0 lb–ft
Standard Limit
0.065 mm
(0.0025 in.)