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Fig. 631: Measuring Cylinder Bore IMPORTANT: Measurements of all components should be taken with the components at normal room temperature.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
1. Use the J 8087 in order to measure the cylinder bore diameter. Measure at a point 64 mm (2.5 in) from the top of the cylinder bore and 90 degrees to the crankshaft centerline. Fig. 632: Measuring Bore Gauge With Micrometer 2. Measure the J 8087 with a micrometer and record the reading. not have excessive wear or taper.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 633: Measuring Piston Outside Diameter Using Micrometer 3. With a micrometer or caliper at a right angle to the piston pin bore, measure the piston 11 mm (0.433 in) from the bottom of the skirt. 4. Subtract the piston diameter from the cylinder bore diameter in order to determine piston- to-bore clearance. Refer to Engine Mechanical Specifications. 5. If the proper clearance cannot be obtained, then select another piston and measure the clearances. If the proper fit cannot be obtained, the cylinder bore may require honing or boring. 6. When the piston-to-cylinder bore clearance is within specifications, permanently mark the top of the piston for installation into the proper cylinder.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Installation Procedure 1. Apply clean engine oil to the following components: The piston The piston rings The cylinder bore The bearing surfaces Fig. 634: Compressing The Piston Rings Using J 8037
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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