Crankshaft Inspection

Crankshaft Total Indicator Runout 

1. Remove the crankshaft from the cylinder block (see Oil Pan Removal  ).
2. Clean the crankshaft oil passages with pipe cleaners or a suitable brush.
3. Check the keyway and threads; repair as necessary.
4. Support the crankshaft with V-blocks.
5. Measure the runout on all of the main journals to make sure the crank is not bent. Rotate the crankshaft two complete revolutions. The difference between measurements on each journal must not be more than the service limit.

   Out-of-Round and Taper 

   1. Standard (New): 0.03 mm (0.001 in.) max.
   2. Service Limit: 0.04 mm (0.002 in.)
   Fig 1: Measuring Runout On All Main Journals

   Courtesy of AMERICAN HONDA MOTOR CO., INC.

   Straightness 

6. Measure out-of-round at the middle of each rod and main journal in two places. The difference between measurements on each journal must not be more than the service limit.

   Journal Out-of-Round 

   1. Standard (New): 0.0025 mm (0.0001 in.) max.
   2. Service Limit: 0.005 mm (0.0002 in.)
   Fig 2: Measuring Out-Of-Round At Middle Of Each Rod

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
7. Measure taper at the edge of each rod and main journal. The difference between measurements on each journal must not be more than the service limit.

   Journal Taper 

   1. Standard (New): 0.0025 mm (0.0001 in.) max.
   2. Service Limit: 0.005 mm (0.0002 in.)