Cylinder Block Inspection
Cylinder Block InspectionReference: Main Bearings, Crankshaft and Cylinder Block Removal and Installation:N32A
Visual inspection
Inspect cylinder walls for scratches, roughness or ridges which indicate excessive wear. If cylinder bore is very rough, deeply scratched, ridged, replace cylinder block, piston rings and/or pistons.
Distortion of Cylinder Head Mating Surface
Using straightedge and thickness gauge, check cylinder head mating surface for distortion and, if flatness exceeds its limit, correct It.
Cylinder block flatness
Limit: 0.05 mm (0.0020 in.)
Cylinder bore diameter, taper and out-of-round
Using a cylinder gauge (1), measure cylinder bore in thrust and axial directions at two positions ("a" and "b") and cylinder taper ("A" and "B") as shown in figure.
If any of the following conditions is noted, replace cylinder block.
^ Cylinder bore dia. exceeds limit.
^ Difference of measurements at two positions exceeds taper limit.
^ Difference between thrust and axial measurements exceeds out-of-round limit.
Cylinder bore diameter
Standard: 88.992 - 89.008 mm (3.5036 - 3.5043 in.)
Limit: 89.050 mm (3.5059 in.)
Cylinder out-of-roundness
Limit: 0.020 mm (0.0008 in.)
Cylinder taper
Limit: 0.013 mm (0.0005 in.)
