Lincoln BB5Z-6250-A Camshaft

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Measure the outside diameter at the top and bottom of the adjuster, then take a second set of measurements at a right angle to the first. If any measurement is significantly different, the adjuster is tapered or out of round and must be replaced.

Use a strand of Plastigage across each journal and measure the width of the compressed strands.

Measure at the top and bottom of each lifter, then a second set at right angles to the first.

Tighten the retaining bolts loosely.

1. Remove the rear cylinder bank timing chain. 2. Note the location of each camshaft cap. Use a marker on each cap or make notes if they're not marked. Do not mix any of the camshaft caps. 3. Gradually loosen the bolts that secure the camshaft bearing caps to the cylinder head in the reverse of the tightening sequence, then remove the camshaft caps. It may be necessary to tap the caps lightly with a soft-faced mallet to loosen them from the locating dowels. 4. Mark the intake and exhaust camshafts to prevent reinstalling them in the wrong locations, then lift the camshafts straight up and out of the cylinder head. 5. Mark the positions of the rocker arms so they can be reinstalled in their original locations, then remove the rocker arms. 6. Place the rocker arms in a suitable container so they can be separated and identified. 7. Lift the hydraulic lash adjusters from their bores in the cylinder head. Identify and separate the adjusters so they can be reinstalled in their original locations.

No, this procedure can only be done with the engine removed.

Loosen the camshaft bearing cap bolts progressively by half a turn at a time, working in the specified sequence.

Disconnect the cable from the negative battery terminal.