5030804 JOHNSON LEAD ASSY., Spark plug, No. 4

Table 1
Specifications for 360-1978 Bearing Kit    
Callout     Part Number     Part Name     Specification Description    
-     -     -     The original size of the main bearing journal is 83.980 to 84.000 mm (3.30629 to 3.30708 inch)    
-     -     -     Maximum permissible wear of the main bearing journals is
0.040 mm (0.0016 inch)    
-     -     -     Surface finish of bearing journals and crank pins is Ra 0.25 microns.    
-     -     -     Width of new main bearing journal where the thrust washer is installed is
39.765 to 39.835 mm (1.56555 to 1.56830 inch)    
-     -     -     Width of new main bearing journal where the thrust washer is not installed is
39.19 to 39.39 mm (1.54291 to 1.55078 inch)    
-     -     -     First oversize bearing shell dimension is
0.25 mm (0.010 inch)
Second oversize bearing shell dimension is
0.50 mm (0.020 inch)
Third oversize bearing shell dimension is
0.50 mm (0.020 inch)    
-     -     -     Thickness at center of the shells of oversize bearing shell
0.25 mm (0.010 inch) is
2.226 to 2.232 mm (0.08764 to 0.08787 inch)    
-     -     -     Thickness at center of the shells of oversize bearing shell
0.50 mm (0.020 inch) is
2.353 to 2.359 mm (0.09264 to 0.09287 inch)    
-     -     -     Thickness at center of the shells of oversize bearing shell
0.76 mm (0.030 inch) is
2.480 to 2.486 mm (0.09764 to 0.09787 inch)    
-     -     -     Width of the main bearing shells is
26.32 to 26.58 mm (1.03622 to 1.04645 inch)    
-     -     -     Clearance between the bearing shell and the main bearing journals is
0.036 to 0.094 mm (0.00142 to 0.00370 inch)    Removal Procedure
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
A (1)     9U-6198     Crankshaft Turning Tool     1    
A (2)     9U-7336     Housing     1    
5P-7305 Engine Turning Tool     1    
B     194-3542     5mm Allen Socket     1    
( 1 ) The Crankshaft Turning Tool is used on the front pulley.
( 2 ) This Tool is used in the aperture for the electric starting motor.Start By:
Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump" for the correct procedure.
Remove the crankshaft rear seal. Refer to Disassembly and Assembly, "Crankshaft Rear Seal" for the correct procedure.Note: Either Tooling (A) can be used. Use the Tooling that is most suitable.
This procedure must only be used to remove and install the main bearing shells with the crankshaft in position.The removal procedure and the installation procedure must be completed for each pair of main bearing shells before the next pair of main bearing shells are removed.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g02441836
Use Tooling (B) in order to remove allen head screws (1) . Remove bridge piece (2) .
Ensure that the main bearing cap is marked for the correct location and orientation.
Illustration 2 g02447416
Remove bolts (3) and main bearing cap (4) from the cylinder block.