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Fig. 452: Measuring Camshaft Runout 13. Measure the camshaft runout. 1. Mount the camshaft in wooden V-blocks or between centers on a fixture. 2. Using the J 7872 , measure the runout of the intermediate camshaft bearing journals. 3. If camshaft runout exceeds 0.05 mm (0.002 in), the camshaft is bent and should be replaced. Measuring Camshaft Lobe Lift
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
Fig. 453: Measuring Camshaft Lobe Lift 1. Using the J 8520 , measure camshaft lobe lift. See Special Tools. 2. Remove the valve rocker arms and bolts. 3. Install the dial indicator mounting stud into the valve rocker arm bolt hole. 4. Assemble the components of the J 8520 and position onto the stud. See Special Tools. 5. Position the shaft of the dial indicator onto the end of the pushrod. 6. Rotate the face of the dial indicator to zero. 7. Slowly rotate the crankshaft clockwise, until the dial indicator obtains its highest and lowest readings. 8. Compare the total to specifications. Refer to Engine Mechanical Specifications. CAMSHAFT BEARING INSTALLATION Tools Required J 33049 Camshaft Bearing Service Set. See Special Tools. IMPORTANT: Measuring camshaft lobe lift is a procedure used to determine if the camshaft lobes have worn. This test is to be
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
Fig. 454: Identifying Engine Block Camshaft Bearing Bores IMPORTANT: The engine block camshaft bearing bores are machined for 3 different outside diameter (OD) size bearings. Position 1 and
2008 Hummer H2 2008 ENGINE Engine Mechanical - 6.2L - H2
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