Crankshaft Inspection: Inspection

How to use this manual .

1. Out-of-Round and Taper - Inspect

   Preconditions 

   • Crankshaft Removed

   Courtesy of HONDA, U.S.A., INC.

   Procedure/Specifications 

   1. Clean the crankshaft oil passages with pipe cleaners or a suitable brush.

   2. Check the keyway slot and the threaded holes.

   3. Measure the out-of-round at the middle of each rod and main journal in two places, and check the difference.Normal conditions: the difference between measurements on each journal must not be more than the service limit.

   Journal Out-of-Round 

   	Standard Value (New)	Service Limit
   a1, b1	0.005 mm (0.00020 in) max.	0.010 mm (0.00039 in)

   4. Measure the taper at the edges of each rod and the main journal. The difference between measurements on each journal must not be more than the service limit.

   Normal conditions: the difference between measurements on each journal must not be more than the service limit.

   Journal Taper 

   	Standard Value (New)	Service Limit
   a, b	0.005 mm (0.00020 in) max.	0.010 mm (0.00039 in)

   Result 

   • If the measurement is not within specifications, replace the crankshaft.
2. Straightness - Inspect

   Preconditions 

   • Crankshaft Removed

   Courtesy of HONDA, U.S.A., INC.

   Procedure/Specifications 

   1. Place the V-blocks on a flat surface.

   2. Check the total runout.

   Tool Details 

   Name
   a	Dial Indicator
   b	V- Block (Commercially Available)

   3. Measure the runout on all of the main journals. Rotate the crankshaft two complete revolutions.

   Normal conditions: the difference between measurements on each journal must not be more than the service limit.

   Crankshaft Total Runout 

   Standard Value (New)	Service Limit
   0.025 mm (0.00098 in) max.	0.030 mm (0.00118 in)

   Result 

   • If the measurement is not within specifications, replace the crankshaft.