Ford 7L2Z-6250-B Camshaft

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Install the hydraulic valve lifters in their original bores, making sure they are coated with engine assembly lube.

Coat the hydraulic lash adjusters with engine assembly lube or moly-base grease, then install them in their original locations.

Loosen the bearing cap bolts in 1/4-turn increments, following the reverse sequence of the tightening procedure, until they can be removed by hand.

If the clearance is too great and the diameter of any journal is less than specified, replace the camshaft. If the journal diameters are within specifications but the oil clearance is too great, the cylinder head must be replaced.

Apply a little oil to the camshaft, then install each of the camshaft bearing caps to its original position using the chart created during removal. Ensure each cap is kept square to the cylinder head as it is tightened down, working in the specified sequence.

a) Clean the bearing surfaces and camshaft journals with lacquer thinner or acetone. b) Carefully lay the camshaft(s) in place in the cylinder head without installing the rocker arms or lash adjusters and without lubrication. c) Lay a strip of Plastigage on each journal. d) Install the camshaft caps. e) Tighten the caps gradually to the specified torque. f) Remove the bolts and detach the caps. g) Compare the width of the crushed Plastigage to the scale on the Plastigage envelope to determine the oil clearance. h) If the clearance is greater than specified and any journal diameter is less than specified, replace the camshaft. If journal diameters are within specifications but oil clearance is too great, the cylinder head is worn and must be replaced.

Measure the major (A) and minor (B) diameters of each cam lobe. The difference between the readings is the lobe lift. Compare your measurement to the lobe lift in this Chapter's Specifications.

Record the figure for future reference and then reposition the piston at TDC on the compression stroke.

Liberally coat the camshaft journals and bearings with engine assembly lube or moly-base grease, then carefully install the camshaft in the cylinder head.

Remove the valve covers.

Camshaft bearing replacement requires special tools and expertise, so it is recommended to take the block (V6) or head (four-cylinder) to an automotive machine shop to ensure the job is done correctly.

Tighten the bolts slowly and by one turn at a time until each cap touches the cylinder head, then follow the specified torque settings in sequence.

On all 1993 models and 1994 Federal emissions models, remove the oil pump drive gear from the block. On 1994 California emissions models and all 1995 and later models, mark the exact orientation of the camshaft position sensor in relation to the block. Remove the camshaft position sensor and synchronizer assembly.

If the timing chain breaks, there will be damage to the valves and possibly the pistons, requiring the removal of the cylinder heads.

If the face of the cam follower that bears on the valve stem is pitted, the cam follower must be replaced with a new one.