Chrysler 1991 Service Manual Supplement page 79

I - 18
5.9L (DIESEL) ENGINES
Fig. 1 Valve Cowers
LOCKNUT ADJUSTING
J9109-31
Fig. 2 Location of Rocker Lever Components
powdered metal and may continue to show wetness
after they have been cleaned and dried.
(6) Inspect for excessive wear in the bore and the
contact surface for the valve stem.
(7) Measure the rocker lever bore diameter. The
maximum diameter is 19.05 mm (0.75 inch). Replace
if out of limits.
(8) Inspect the pedestal and shaft.
(9) Measure the shaft diameter. The minimum di-
ameter is 18.94 mm (0.746 inch). Replace i f out of
limits.
ASSEMBLE—ROCKER LEWERS
(1) Install the adjusting screw and locknut.
(2) Lubricate the shaft with clean engine oil. Be
sure to assemble the intake and exhaust rocker le-
vers in the correct location.
(3) Position the levers on the rocker shaft. Install
the thrust washers.
(4) Clean the push rods in the hot soapy water.
(5) Inspect the push rod ball and socket for signs of
scoring or cracks where the ball and the socket are
pressed into the tube.
(6) Check the push rods for roundness and straight-
' ness.
(7) Install the push rods into the sockets of the
valve tappets. Lubricate the push rod sockets with
clean engine oil.
(8) Make sure the rocker lever adjusting screws are
completely backed out.
INSTALLATION
(1) Make sure the dowel rings in the pedestals are
installed into the dowel bores in the cylinder head.
(2) If the push rod is holding the pedestal off of the
cylinder head, bar the engine until the pedestal will
set on the head surface without interference.
(3) Use clean engine oil to lubricate the cylinder
head bolt threads and under the bolt heads.
(4) Install the long bolts (12 mm) into the rocker
lever pedestals. Tighten the bolts as follows:
• Step 1—Tighten the bolts, in sequence (Fig. 3), to
90 N-m (66 ft. lbs.) torque. Check the torque. If lower
than 90 N-m (66 ft. lbs.), tighten to this torque.
• Step 2—Tighten the bolts, in sequence (Fig. 3), to
120 N-m (89 ft. lbs.) torque. Check the torque. I f
lower than 120 N-m (89 ft. lbs.), tighten to this
torque.
• Step 3—Tighten the bolts, in sequence (Fig. 3), an
additional 90°.
C n FRONT
J 9 1 0 9 - 3 2
Fig. 3 Rocker Lever (Head Bolts) Tightening
Sequence
(5) Tighten the 8 mm bolts to 24 N-m (18 ft. lbs.)
torque.
(6) Install the valve cover. Tighten the valve cover
bolt to 24 N-m (18 ft. lbs.) torque.