Camshaft Measurement
WARNING: This page is about a different car, the 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
With the camshaft in a suitable fixture, measure the camshaft for wear.
Measure the camshaft journals for diameter and out-of-round using an outside micrometer. Refer to Engine Mechanical Specifications .
- If the diameter is smaller than specifications, replace the camshaft.
- If the out-of-round exceeds specifications, replace the camshaft.
Measure the camshaft runout using the GE-7872 indicator. Refer to Engine Mechanical Specifications .
Measure the camshaft thrust width for wear using a depth micrometer. Refer to Engine Mechanical Specifications .
Measure the camshaft thrust wall surface for runout using GE-7872 indicator. Refer to Engine Mechanical Specifications .
- If the camshaft is damaged or worn beyond specifications, replace the camshaft. No machining of the camshaft is allowed.
Measure the camshaft lobes for wear using the GE-7872 indicator.
Place the GE-7872 indicator with the indicator tip on the base circle (1) of the camshaft lobe.
- Place the GE-7872 indicator at zero.
- 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 .
- If the indicated measurement is significantly lower than these specifications, replace the camshaft or engine performance will be reduced.