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Fig. 548: Measuring Valve Stem-To-Guide Clearance Using J 8001 10. Measure the valve stem-to-guide clearance. Excessive valve stem-to-guide clearance may cause an excessive oil consumption and may 1. Clamp the J 8001 on the exhaust port side of the cylinder head. 2. Position the dial indicator so that the movement of the valve stem from side to side, crosswise to the cylinder head, will cause a direct movement of the dial indicator stem.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
The dial indicator stem must contract the side of the valve stem just above the valve 3. Drop the valve head about 1.6 mm (0.063 in) off the valve seat. 4. Use light pressure and move the valve stem from side to side in order to obtain a valve stem-to-guide clearance reading. Refer to Engine Mechanical Specifications . VALVE GUIDE REAMING, AND VALVE AND SEAT GRINDING Tools Required J 5830-02 Valve Guide Reamer Set. See Special Tools. Servicing
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 549: Inspecting For Excessive Valve Stem To Guide Clearance 1. Measure the valve stem-to-guide clearance. Refer to Cylinder Head Cleaning and Inspection. 2. Improper valve stem (1) to valve guide (2) clearance may cause excessive oil consumption.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 550: Reaming Exhaust Valve Guide Using J 5830-3 CAUTION: Refer to SAFETY GLASSES CAUTION . IMPORTANT: Exhaust valves with excessive valve stem-to-guide clearance must be replaced with the available service valve that has an
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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