Mazda LF Wartungshandbuch PDF herunterladen (Seite 38)

ENGINE

B–21

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

mm {in}

Maximum out-of-round:

0.05 mm {0.0019 in}

Crank pin

mm {in}

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 B–30 Main Bearing Caps Assembly Note.)

9. Remove the main bearing caps. (See B–11 Main Bearing Cap Disassembly Note.)

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}

mm {in}

Bearing size Standard diameter

Standard 51.980—52.000 {2.0464—2.0472}

0.25 {0.01}

undersize

51.730—51.750 {2.0366—2.0373}

Bearing size Standard diameter

Standard 49.980—50.000 {1.9677—1.9685}

0.25 {0.01}

undersize

49.730—49.750 {1.9579—1.9586}

Bearing

size

Color Bearing thickness

Standard Green 2.506—2.509 {0.0987—0.0988}

0.25 {0.01}

oversize

2.628—2.634 {0.1034—0.1037}

0.50 {0.02}

oversize

2.753—2.759 {0.1084—0.1086}

AME2224E036

AME2224E038

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