Dodge RAM TRUCK 1500 1995 Service Manual page 966

mm
8 J L ENGINE
i -125
REMOVAL
(1) Disconnect the negative cable from the battery.
(2) Remove the air cleaner.
(8) Remove cylinder head cover.
(4) Remove rocker arm assembly and push rods.
Identify push rods to ensure installation in original
location.
(5) Remove upper and lower intake manifold.
(6) Remove the cylinder head, if the end tappets
are to be removed.
(7) Remove yoke retainer spider and tappet align­
ing yokes (Fig. 1).
Fig. 1 Tappets, Aligning Yoke and Woke Retaining
Spider
(8) Pull tappet out of bore with a twisting motion.
If all tappets are to be removed, identify tappets to
ensure installation in original location.
(9) If the tappet or bore in cylinder block is scored,
scuffed, or shows signs of sticking, ream the bore to
next oversize. Replace with oversize tappet.
(10) Check camshaft lobes for abnormal wear.
INSTALLATION
(1) Lubricate tappets.
(2) Install tappets in their original positions. En­
sure that' the oil bleed hole (if so equipped)
faces forward.
(8) Install tappet aligning yokes. Position the yoke
retainer spider over the tappet aligning yokes (Fig.
1). Install the yoke retaining spider bolts and tighten
to 22 N-m (18 ft. lbs.) torque.
(4) Install cylinder head if removed.
(5) Install the push rods in their original location.
(6) Position the rocker arm assembly on the pedes­
tal and align to the push rods. Install the bolts and
tighten to 28 N-m (21 ft. lbs.) torque.
(7) Install lower and upper intake manifold.
(8) The cylinder head cover gasket can be used
again. Install the gasket onto the head rail. For the
left side the member tab is at the front of en­
gine with the number up. For the right side the
mnsber tab is at the rear of engine with the
number up.
CAUTION: The cylinder head cower fasteners have a
special plating. DO NOT use alternative fasteners.
(9) Position the cylinder head cover onto the gas­
ket. Install the stud bolts and hex head bolts in the
proper positions (Fig. 1). Tighten the stud bolts and
the bolts to 16 N*m (144 in. lbs.) torque.
(10) Install the air cleaner.
C A U T I O N To prevent damage to valve mechanism,
engine must not be run above fast idle until all hy­
draulic tappets have filled with oil and have become
quiet
(11) Connect the negative cable to the battery.
(12) Road test vehicle and check for leaks.
VALVE TlillG
(1) Turn crankshaft until the No.6 exhaust valve is
closing and No.8 intake valve is opening.
(2) Insert a 6.350 mm (1/4 inch) spacer between
rocker arm pad and stem tip of No.l intake valve. Al­
low spring load to bleed tappet down giving in effect
a solid tappet.
(3) Install a dial indicator so plunger contacts
valve spring retainer as nearly perpendicular as pos­
sible. Zero the indicator.
(4) Rotate the crankshaft clockwise (normal run­
ning direction) until the valve has lifted 0.863 mm
(0.034 inch). The timing of the crankshaft should
now read from 10° before top dead center to 2° after
top dead center. Use a protractor as there are no tim­
ing marks on the engine.
CAUTaOrl: DO HOT turn crankshaft any further
clockwise as valve spring might bottom and result
in serious damage.
(5) If reading is not within specified limits:
(a) Check sprocket index marks.
(b) Inspect timing chain for wear.
(c) Check accuracy of TDC mark on timing indi­
cator.
ORATION DAMPER
REMOVAL
(1) Disconnect the negative cable from the battery.
(2) Remove fan shroud retainer bolts and set
shroud back over engine.