Dodge ram truck 3500 1996 Service Manual page 1126

9 • 136 8.0L ENGINE
REMOVAL
A N D I N S T A L L A T I O N
(Continued)
CYLINDER HEAD COVER GASKETS LEFT
Fig. 16 Cylinder Head Cover Gaskets
REMOVAL
(1) Disconnect the negative cable from the battery.
(2) Disconnect closed ventilation system and evap­
oration control system from cylinder head cover.
Identify each system for installation.
(3) Remove the upper intake manifold to remove
the right side head cover (refer to Group 11, Exhaust
System and Intake Manifold).
(4) Remove cylinder head cover bolts and stud
bolts. Remove the covers and gaskets. The gasket
may be used again.
INSTALLATION
(1) Clean cylinder head cover gasket surface.
(2) Clean head rail, i f necessary.
(3) Check the gasket for use in head cover instal­
lation. I f damaged, use a new gasket.
(4) Install the gasket onto the head rail. For the
left side the number tab is at the front of
engine with the number up. For the right side
the number tab is at the rear of engine with the
number up,
CAUTION: The cylinder head cover fasteners have
a special plating. DO NOT use alternative fasteners.
(5) Position the cylinder head cover onto the gas­
ket. Install the stud bolts and hex head bolts in the
proper positions (Fig. 15). Tighten the stud bolts and
the bolts to 16 N-m (144 in. lbs.) torque.
(6) I f removed, install the upper intake manifold
(refer to Group 11, Exhaust System and Intake Man­
ifold).
(7) Install closed crankcase ventilation system and
evaporation control system onto the proper head
cover. DO NOT switch the systems.
(8) Connect the negative cable to the battery.
ROCKER
ARMS
AND PUSH RODS
REMOVAL
(1) Disconnect spark plug wires by pulling the boot
straight out in line with plug.
(2) Remove cylinder head cover and gasket.
(3) Remove the rocker arm bolts and the rocker
arm assembly (Fig. 17). Place rocker arm assemblies
on a bench in the same order as removed.
(4) Remove the push rods and place them on a
bench in the same order as removed.
ROCKER
• ARM
PEDESTALS
J9409-60
Fig. 17 Rocker Arm Assembly
INSTALLATION
CAUTION: DO NOT rotate or crank the engine dur­
ing or immediately after rocker arm installation.
Allow the hydraulic roller tappets adequate time to
bleed down (about 5 minutes).
(1) Install the push rods i n the same order as
removed.
(2) Install rocker arm assemblies i n the same
order as removed. Tighten the rocker arm bolts to 28
N-m (21 ft. lbs.) torque.
(3) Install cylinder head cover and gasket. DO
NOT use alternative fasteners.
(4) Connect spark plug wires.
VALVE STEM SEAL AND SPRING REPLACEMENT
This procedure is done with the cylinder head
installed.
(1) Disconnect the negative cable from the battery.
(2) Set engine basic timing to Top Dead Center
(TDC) and remove air cleaner.
(3) Remove cylinder head covers and spark plugs.
(4) Using suitable socket and flex handle at crank­
shaft retaining bolt, turn engine so the No.l piston is
at TDC on the compression stroke.
(5) Remove rocker arms.
(6) With air hose attached to an adapter installed
in N o . l spark plug hole, apply 620-689 kPa (90-100
psi) air pressure.
(7) Using Valve Spring Compressor Tool
MD-998772A with adapter 6716A, compress valve
spring and remove retainer valve locks and valve
spring.