Camshaft Measurement

WARNING: This page is about a different variant/trim than selected.

Fig 1: Supporting Camshaft In Fixture

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Fig 2: Measuring Camshaft Journals

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Measure the camshaft journals for diameter and out of round using an outside micrometer. Refer to Engine Mechanical Specifications (LFX) .
- If the diameter is smaller than specifications, replace the camshaft.
- If the out of round exceeds specifications, replace the camshaft.

Fig 3: Checking Camshaft Runout

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Measure the camshaft runout using the GE 7872 indicator. Refer to Engine Mechanical Specifications (LFX) .

Fig 4: Measuring Camshaft Thrust Width

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Measure the camshaft thrust width for wear using a depth micrometer. Refer to Engine Mechanical Specifications (LFX) .

Fig 5: Measuring Camshaft

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Measure the camshaft thrust wall surface for runout using GE 7872 indicator. Refer to Engine Mechanical Specifications (LFX) .
If the camshaft is damaged or worn beyond specifications, replace the camshaft. No machining of the camshaft is allowed.

Fig 6: Measuring Camshaft Lobes For Wear

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Fig 7: View of Lobe Diagram

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Place the GE 7872 indicator with the indicator tip on the base circle (1) of the camshaft lobe.
1. Place the GE 7872 indicator at zero.
2. 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 (LFX) .
3. If the indicated measurement is significantly lower than these specifications, replace the camshaft or engine performance will be reduced.