Cylinder Block Inspection
Cylinder Block InspectionDistortion of Gasket Surface
Using straightedge and thickness gauge, check gasket surface for distortion. If flatness exceeds its limit, correct or replace it.
Gasket surface flatness
Limit: 0.06 mm (0.0024 in.)
Honing or reboring cylinders
1. When any cylinder needs reboring, all other cylinders must also be rebored at the same time.
2. Select oversized piston according to amount of cylinder wear.
Oversize piston diameter
88.470 - 88.490 mm (3.4831 - 3.4838 in.)
3. Using micrometer, measure piston diameter.
4. Calculate cylinder bore diameter to be rebored as follows.
D = A + B - C
D: Cylinder bore diameter to be rebored
A: Piston diameter as measured
B: Piston clearance = 0.02 - 0.04 mm (0.0008 - 0.0015 in.)
C: Allowance for honing = 0.02 mm (0.0008 in.)
5. Rebore and hone cylinder to calculated dimension.
NOTE:
Before reboring, install lower crankcase in place and tighten to specification to avoid distortion of bearing bores.
6. Measure piston clearance after honing.