Corvette V8-5.7L VIN G (1997)
NOTE: Measuring camshaft lobe lift is a procedure used to determine if the camshaft lobes have worn. This test is to be performed prior to
engine disassembly and with the camshaft and valve train components installed in the engine.
13. Measure camshaft lobe lift using a camshaft lobe lift indicator.
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Remove the valve rocker arms and bolts
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Install the dial indicator mounting stud into the valve rocker arm bolt hole.
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Assemble the components of the J 8520 and position onto the stud.
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Position the shaft of the dial indicator onto the end of the pushrod.
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Rotate the face of the dial indicator to zero.
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Slowly rotate the crankshaft clockwise until the dial indicator obtains its highest and lowest readings.
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Compare the total lift shown to specifications.
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Remove the tool.
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If measurements are not within specifications, remove the camshaft. Inspect and/or replace components as required.
