Service manual

6. Inspect the engine camshaft for the following:
• Worn, scored, or damaged bearing journals (1)
• Worn engine camshaft lobes (2)
• Damaged bolt hole threads (3)
• Damaged camshaft sprocket locator pin (4)
7. Measure the engine camshaft journals with a
micrometer.
If the camshaft journals are more than 0.025 mm
(0.0010 in) out-of-round, then replace the
engine camshaft.
8. Measure for a bent engine camshaft or excessive
engine camshaft runout using the
J 7872 .
8.1. Mount the engine camshaft in a suitable
stand between centers.
8.2. Use the
J 7872 in order to check the
intermediate engine camshaft journals.
If the runout exceeds 0.065 mm (0.0026 in),
the engine camshaft is bent and must be
replaced.
9. Measure the engine camshaft lobe lift using the
J 7872 .
9.1. Place the engine camshaft on the V-blocks.
9.2. Use the
J 7872 in order to measure the
engine camshaft lobe lift.
10. Replace the engine camshaft if the engine
camshaft lobe lift is not within specifications.
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6-68 Engine Mechanical - 5.0L and 5.7L Engine
2002 - Unit Repair (May 25, 2001)