Honda Workshop Service and Repair Manuals

Main bearing-to-journal oil clearance engines

No. 1 journal 

Standard or New .............................................................................................................................  0.013 - 0.037 mm (0.0005 - 0.0015 inch) 
Limit .........................................................................................................................................................................  0.045 mm (0.0018 inch) 

F23A1 (2500001 -), F23A4 (2500001 -) 

No. 2 journal 

Standard or New .............................................................................................................................  0.021 - 0.045 mm (0.0008 - 0.0018 inch) 
Limit .........................................................................................................................................................................  0.050 mm (0.0020 inch) 

No. 3 journal 

Standard or New .............................................................................................................................  0.025 - 0.049 mm (0.0010 - 0.0019 inch) 
Limit ..........................................................................................................................................................................  0.055 mm (0.0022 inch)

No. 4 journal 

Standard or New .............................................................................................................................  0.013 - 0.037 mm (0.0005 - 0.0015 inch) 
Limit ..........................................................................................................................................................................  0.045 mm (0.0018 inch)

No. 5 journal 

Standard or New .............................................................................................................................  0.009 - 0.033 mm (0.0004 - 0.0013 inch) 
Limit .........................................................................................................................................................................  0.040 mm (0.0016 inch) 

Rod bearing clearance 

Standard or New .........................................................................................................................................  0.021 - 0.049 mm (0.0008 - 0.0019 inch) 
Limit ......................................................................................................................................................................................  0.060 mm (0.0024 inch)

Oil Clearance

Main Bearing-to-Journal Oil Clearance:
Except F23A1-2500001~:

Standard (New):

No.1, 2, 4: 0.021 - 0.045 mm (0.0008 - 0.0018 inch)
No.3: 0.025 - 0.049 mm (0.0010 - 0.0019 inch)
No.5: 0.009 - 0.033 mm (0.0004 - 0.0013 inch)

Service Limit:

No.1, 2, 4: 0.050 mm (0.0020 inch)
No.3: 0.055 mm (0.0022 inch)
No.5: 0.040 mm (0.0016 inch) 

F23A1-2500001 ~:

Standard (New):

No.1, 4: 0.013 - 0.037 mm (0.0005 - 0.0015 inch)
No.2: 0.021 - 0.045 mm (0.0008 - 0.0018 inch)
No.3: 0.025 - 0.049 mm (0.0010 - 0.0019 inch)
No.5: 0.009 - 0.033 mm (0.0004 - 0.0013 inch)

Service Limit:

No.1, 4: 0.045 mm (0.0018 inch)
No.2: 0.050 mm (0.0020 inch)
No.3: 0.055 mm (0.0022 inch)
No.5: 0.040 mm (0.0016 inch)