Measuring Camshaft Lobe Lift
WARNING: This page is about a different variant/trim than selected.
- Using the J 8520 indicator , measure camshaft lobe lift.
- Remove the valve rocker arms and bolts.
- Install the dial indicator mounting stud into the valve rocker arm bolt hole.
- Assemble the components of the J 8520 indicator and position onto the stud.
- Position the shaft of the dial indicator onto the end of the pushrod.
- Rotate the face of the dial indicator to zero.
- Slowly rotate the crankshaft clockwise, until the dial indicator obtains its highest and lowest readings.
- Compare the total to specifications. Refer to Engine Mechanical Specifications (L99)Engine Mechanical Specifications (LS3)Engine Mechanical Specifications (LSA)Engine Mechanical Specifications (LS7) . The total lobe lift is the difference between the highest and lowest reading.
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.