Engine Block: Diagnosis Honda Fit I

Crankshaft Inspection

Straightness

Scheme 218

Scheme 219

1. Remove the crankshaft from the engine block (see «CRANKSHAFT AND PISTON REMOVAL»(ref-291421-S33744286702008072800000) ).
2. Clean the crankshaft oil passages with pipe cleaners or a suitable brush.
3. Check the keyway and thread; repair or replace it if necessary.
4. Support the crankshaft with V-blocks.
5. Measure runout on all 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. Crankshaft Total Indicator Runout Standard (New): 0.03 mm (0.0012 in.) max. Service Limit: 0.04 mm (0.0016 in.) Out-of-Round and Taper
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 Standard (New): 0.005 mm (0.0002 in.) max. Service Limit: 0.010 mm (0.0004 in.)
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 Standard (New): 0.005 mm (0.0002 in.) max. Service Limit: 0.010 mm (0.0004 in.)

Scheme 220

Scheme 221

Scheme 222

Scheme 223

1. Remove the crankshaft and the pistons (see «CRANKSHAFT AND PISTON REMOVAL»(ref-291421-S33744286702008072800000) ).
2. Check the piston for distortion or cracks.
3. Measure the piston diameter (A) at a point 16 mm (0.6 in.) from the bottom of the skirt. Piston Diameter Standard (New): 72.98-72.99 mm (2.8732-2.8736 in.) Service Limit: 72.97 mm (2.8728 in.) Oversize Piston Diameter 0.25: 73.23-73,24 mm (2.8831-2.8835 in.)
4. Measure wear and taper in direction X and Y at three levels in each cylinder as shown. If measurements in any cylinder are beyond the Oversize Bore Service Limit, replace the engine block. If the engine block is to be rebored, refer to step 7 after reboring. Cylinder Bore Size Standard (New): 73.00-73.02 mm (2.8740-2.8748 in.) Service Limit: 73.07 mm (2.8767 in.) Oversize 0.25: 73.25-73.27 mm (2.8839-2.8846 in.) Reboring limit: 0.25 mm (0.01 in.) max. Bore Taper Limit: (Difference between first and third measurement) 0.05 mm (0.002 in.)
5. Scored or scratched cylinder bores must be honed.
6. Check the top of the engine block for warpage. Measure along the edges and across the center as shown. Engine Block Warpage Standard (New): 0.07 mm (0.003 in.) max. Service Limit: 0.10 mm (0.004 in.)
7. Calculate the difference between the cylinder bore diameter and the piston diameter. If the clearance is near or exceeds the service limit, inspect the piston and engine block for excessive wear. Piston-to-Cylinder Clearance Standard (New): 0.010-0.040 mm (0.0004-0.0016 in.) Service Limit: 0.05 mm (0.002 in.)