Engine Block

Block and Piston Inspection (cont'd)

 7-15  

  1. Scored or scratched cylinder bores must be honed.
  2. Check the top of the block for warpage. Measure along the edges and across the centre as shown.

Engine Block Warpage:

Standard (New): 0.07 mm (0.003 in.) max.
Service Limit: 0.10 mm (0.004 in.)

  1. PRECISION STRAIGHT EDGE
  1. 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 cylinder 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.)

  1. PISTON-TO-CYLINDER CLEARANCE