Camshaft Cleaning and Inspection
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Camshaft Cleaning and Inspection
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Special Tools
EN-49474
Magnetic Base Dial Indicator
For equivalent regional tools, refer to
Special Tools
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1.
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Clean the camshaft in solvent.
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2.
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Warning
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Wear safety glasses when using compressed air, as flying dirt particles may cause eye injury.
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Dry the camshaft with compressed air.
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1.
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Inspect the camshaft oil feed holes (1) to the camshaft position actuator for dirt, debris or blockage.
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2.
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Inspect the threaded hole (2) for damage.
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3.
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Inspect the camshaft position actuator locating notch (3) for damage or wear.
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4.
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Inspect the camshaft sealing grooves (4) for damage.
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5.
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Inspect the camshaft thrust surface (5) for damage.
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6.
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Inspect the camshaft lobes (6) and journals (7) for the following conditions:
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Excessive scoring or pitting
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Discoloration from overheating
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Deformation from excessive wear, especially the camshaft lobes
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7.
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If any of the above conditions exist on the camshaft, replace the camshaft.
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1.
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With the camshaft in a suitable fixture, measure the camshaft for wear.
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If the diameter is smaller than specifications, replace the camshaft.
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If the out-of-round exceeds specifications, replace the camshaft.
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6.
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If the camshaft is damaged or worn beyond specifications, replace the camshaft. No machining of the camshaft is allowed.
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7.
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Measure the camshaft lobes for wear using the
EN 49474
indicator.
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8.
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Place the
EN 49474
indicator with the indicator tip on the base circle (1) of the camshaft lobe.
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8.1.
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Place the
EN 49474
indicator at zero .
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8.2.
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Rotate the camshaft until the indicator tip is at the highest point (3) on the lobe. This reading is the lift of the camshaft lobe. Refer to
Engine Mechanical Specifications
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8.3.
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If the indicated measurement is significantly lower than these specifications, replace the camshaft or engine performance will be reduced.
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