Main Bearing And Connecting Rod Bearing Inspection - Mazda B-Series 1997 Workshop Manual

INSPECTION I REPAIR
B1
CRATERS OR POCKETS BRIGHT (POLISHED)
SECTIONS
I
FATIGUE FAILURE IMPROPER SEATING
SCRATCHES DIRT
IMBEDDED OLJT
INTO BEARING
MATERIAL
SCRATCHED BY DIRT LACK OF OIL OR
IMPROPER CLEARANCE
OVERLAY GONE
w3
FROMEDGES RADIUS R113E
HOURGLASSING RADIUS R113E
5. If the diameter is less than the minimum, grind the journals
to accept undersize bearings.
Undersize bearing
0.050mm (0.002 in) (main journal and crankpin)
Main journal diameter undersize
rnm
{in)
Bearing size Journal diameter
- - - - - - - - - - - -
0.050 10.0021 k5.97-55.95 12.2039-2.2031
I
Crankpin journal diameter undersi2.e
rnrn (in1
Bearing size Journal diameter
-----h-~9~2.01~2-2.04921
10.050 10.0021
BEARING
Main Bearing and Connecting Rod Bearing
Check the main bearing and connecting rod bearings for
peeling, scoring and other damage.
TIMING BELT
Caution
Never forcefully, twist, turn inside out, or bend the
timing belt.
Be careful not to allow oil or grease on the belt.
1. Replace the timing belt if there is any grease on it.