Removal, inspection and installation
1. Remove the valve cover (section 3).
2. Loosen the valve lever pivot bolt so that you can rotate the valve lever to one side and pull out the valve lifter rod (see illustration).
3. If you remove more than one bar, install them so that they can be reinstalled exactly in place later.
4. If you are going to remove all the valve levers, mark them so that you can install them in their places later - do not mix them up.
5. Clean all parts and check them for wear and damage. Push rods can be rolled on glass to check their straightness. Check the hinge pins and levers for wear and metal galling. The contact points of the rods and levers are most often worn out (see figure). If wear is obvious, replace the part.
6. Before installation, apply moth-based grease or motor oil to the pivot pins and pushrod ends.
7. Before installing the push rod, make sure the valve lifter is lowered. If necessary, turn the crankshaft with a wrench to lower the valve lifter.
8. Tighten the valve lever mounting bolt to the torque specified in the specification.
9. If any parts have been removed, check the valve adjustment as described below.
10. Reinstall the valve cover(s) (section 3).
Adjustment
Note: Adjustment is usually only done if any parts have been replaced/or if the seats and valves have been ground in.
11. Using a Ford T70P-6513-A or similar pushrod puller tool (see illustration), push the valve lever until the pushrod slides down. Check the valve stem to lever clearance with a feeler gauge. Compare with specification and record the reading. Repeat the operation for each valve in the order shown below.
Note: The location of the inlet (I) and outlet (E) valves, starting from the front (drive belt side), is as follows:
Left side (front)
3.0L - I - E - I - E - I - E
3.8L - E - I - E - I - E - I
Right side (rear)
3.0L - E - I - E - I - E - I
3.8L - I - E - I - E - I - E
12. Set piston No.1 to TDC in the compression stroke (section 11). This is position 1 (see figure).
13. Check the following valves:
intake - 1, 3 and 6
issue - 1, 2 and 4
14. Turn the crankshaft to position 2 and check the following valves:
intake - 2, 4 and 5
issue - 3, 5 and 6
If clearances are within specification, install the valve cover.
15. If clearances are small, use shorter pushrods; if too big - longer ones.
[The text was obtained in its entirety from the specified website: fordbook]