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5. A correctly honed surface will have a crosshatch appearance with the lines at 15° to 25° angles. For the rough hone, use 80 grit honing stones. To finish hone, use 280 grit honing stones. 6. Use a drill, a fine grit Flex-hone and a mixture of equal parts of mineral spirits and SAE 30W engine 7. The crosshatch angle is a function of drill speed and how fast the hone is moved vertically. 8. Vertical strokes MUST be smooth continuous passes along the full length of the bore. 9. Inspect the bore after 10 strokes. 10. Use a strong solution of hot water and laundry detergent to clean the bores. Clean the cylinder 11. Rinse the bores until the detergent is removed and blow the block dry with compressed air. 12. Check the bore cleanliness by wiping with a white, lint free, lightly oiled cloth. If grit residue is 13. Be sure to remove the tape covering the lube holes, rod journals, and piston cooling nozzles after the cleaning process is complete. STANDARD PROCEDURE—CYLINDER BORE REPAIR Cylinder bore(s) can be repaired by one of two methods: • Method 1:—Over boring and using oversize pistons and rings. • Method 2:—Boring and installing a repair sleeve to return the bore to standard dimensions. METHOD 1—OVERSIZE BORE Cylinder bore(s) can be repaired by one of two methods: Oversize pistons and rings are available in two sizes - 0.50 mm (0.0197 inch) and 1.00 mm (0.0393 inch). Any combination of standard, 0.50 mm (0.0197 inch) or 1.00 mm (0.0393 inch) overbore may be used in the same If more than 1.00 mm (0.0393 inch) overbore is needed, a repair sleeve can be installed (refer to Method 2—Repair Cylinder block bores may be bored twice before use of a repair sleeve is required. The first bore is 0.50 mm After boring to size, use a honing stone to chamfer the edge of the bore. CYLINDER BORE DIMENSION CHART DESCRIPTION MEASUREMENT BORING DIAMETER DIMENSION 1st. REBORE - 102.469 mm (4.0342 in.) 2nd. REBORE - 102.969 mm (4.0539 in.) HONING DIAMETER DIMENSIONS STANDARD - 102.020 ± 0.020 mm (4.0165 ± 0.0008 in.) 1st. REBORE - 102.520 ± 0.020 mm (4.0362 ± 0.0008 in.) 2nd. REBORE - 103.020 ± 0.020 mm 4.0559 ± 0.0008 in.) CHAMFER DIMENSIONS Approx. 1.25 mm (0.049 in.) by 30° 9 - 2586 ENGINE - 5.9L DIESEL - SERVICE INFORMATION DR/DH |