GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 7872 Magnetic Dial Indicator Set


    Object Number: 35212  Size: SH
  1. Measure the camshaft journals with a micrometer.
  2. If journals are more than 0.025 mm (0.0010 in) out-of-round, replace the camshaft.


    Object Number: 35211  Size: SH
  3. Measure camshaft runout using J 7872 .
  4. 2.1. Mount the camshaft in wooden V-blocks or between centers on a fixture.
    2.2. Use the J 7872 in order to check the intermediate camshaft journal.
  5. If runout exceeds 0.05 mm (0.002 in), camshaft is excessively bent and should be replaced.