|
|
Fig. 393: View Of Honing Of Cylinders 1. When honing the cylinders, follow the manufacturer's recommendations for equipment use, cleaning, and lubrication. Use only clean, sharp stones of the proper grade for the amount of 2. During the honing operation, thoroughly clean the cylinder bore. Repeatedly check the cylinder bore for fit with the selected piston. All measurements of the piston or the cylinder bore should be made with the components at 3. When honing a cylinder for fit to an oversize piston, first perform the preliminary honing with a 100-grit stone. 4. Perform final cylinder honing with a 240-grit stone and obtain a 45 degree cross hatch pattern. A 240-grit stone is preferred for final honing. If a 240-grit stone is not available, a 220-grit
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
stone may be used as a substitute. 5. The finish marks should be clean but not sharp. The finish marks should also be free from imbedded particles and torn or folded metal. 6. By measuring the selected piston at the sizing point and by adding the average of the clearance specification, you can determine the final cylinder honing dimension required. 7. After final honing and before the piston is checked for fit, clean the cylinder bores with hot water and detergent. Scrub the bores with a stiff bristle brush and rinse the bores thoroughly 8. Perform final measurements of the piston and the cylinder bore. 9. Permanently mark the top of the piston for the specific cylinder to which it has been fitted. 10. Apply clean engine oil to each cylinder bore in order to prevent rusting. Deglazing Procedure
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
Fig. 394: Illustrating Deglazing Cylinder Bore Using a ball type or self centering honing tool, deglaze the cylinder bore lightly. Deglazing A 240-grit stone is preferred for final honing. If a 240-grit stone is not available, a 220-grit stone CRANKSHAFT AND BEARING CLEANING AND INSPECTION
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
Tools Required J 7872 Magnetic Base Dial Indicator Set J 43690 Rod Bearing Checking Tool. See Special Tools. J 43690-100 Rod Bearing Checking Tool - Adapter Kit. See Special Tools. Cleaning Procedure Fig. 395: Oil Passages & CKP Reluctor Ring Teeth IMPORTANT: Use care when handling the crankshaft. Avoid damage to the bearing surfaces or the lobes of the crankshaft position
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
|
|
|