Ford — Camshaft Lobe Lift Check

Testing & diagnosis

From a Ford service manual — check it applies to your exact model before use.

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Procedure

1. Remove the air cleaner and the valve rocker arm cover.
2. Remove the valve rocker arm shaft assembly.
3. Make sure the push rod is in the valve lifter socket; install a dial indicator with its ball socket adapter on the push rod end.
4. Crank (bump) the crankshaft until the tappet is on the base circle of the camshaft lobe; the push rod will be in its lowest position.
5. Zero the dial indicator and rotate the crankshaft slowly until the push rod is fully raised; record total lift.
6. Compare the total lift with specifications.
7. If the lift on any lobe is below specified wear limits, replace the camshaft and the valve lifters on the worn lobe(s).

Source: Ford service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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