Mazda L8 Workshop Manual page 38

5. Measure the journal diameter in X and Y
directions at the two points (A and B) as indicated
in the figure.
• If not as specified, replace the crankshaft or
grind the journal and install the undersize
bearing.
Main journal
Bearing size
Standard 51.980—52.000 {2.0464—2.0472}
0.25 {0.01}
51.730—51.750 {2.0366—2.0373}
undersize
Maximum out-of-round:
0.05 mm {0.0019 in}
Crank pin
Bearing size
Standard 49.980—50.000 {1.9677—1.9685}
0.25 {0.01}
49.730—49.750 {1.9579—1.9586}
undersize
Maximum out-of-round:
0.05 mm {0.0019 in}
6. Install the main bearing caps and crankshaft.
7. Position a plastigage atop the journals in the axial direction.
8. Install the main bearing caps and cylinder block. (See
9. Remove the main bearing caps. (See
10. Measure the main journal oil clearance.
• If the clearance exceeds the maximum,
replace the main bearing using the main
bearing selection table or grind the main
journal and install the oversize bearings so
that the specified oil clearance is obtained.
Standard clearance:
0.019—0.035 mm {0.0007—0.0013 in}
Maximum clearance:
0.10 mm {0.0039 in}
Bearing
Color
size
Standard Green 2.506—2.509 {0.0987—0.0988}
0.25 {0.01}
2.628—2.634 {0.1034—0.1037}
oversize
0.50 {0.02}
2.753—2.759 {0.1084—0.1086}
oversize
ENGINE
mm {in}
Standard diameter
mm {in}
Standard diameter
B–11 Main Bearing Cap Disassembly
mm {in}
Bearing thickness
B–30 Main Bearing Caps Assembly
Note.)
B
AME2224E036
Note.)
AME2224E038
B–21