Dodge ram truck 3500 1996 Service Manual page 1143

BR — — — _ _
DISASSEMBLY AND ASSEMBLY (Continued)
8.0L ENGINE 9 - 153
INTAKE
VALVE
TORQUE
WRENCH
FACE
* STEM-
VALVE SPRING
RETAINER LOCK
GROOVE
EXHAUST
VALVE
J 9 2 0 9 - 1 2 7
Fig. 61 intake and Exhaust Valves
ing stones. A true and complete surface must be
obtained.
(2) Measure the concentricity of valve seat using a
dial indicator. Total runout should not exceed 0.038
mm (0.0015 inch) total indicator reading.
(3) Inspect the valve seat with Prussian blue to
determine where the valve contacts the seat. To do
this, coat valve seat LIGHTLY with Prussian blue
then set valve in place. Rotate the valve with light
pressure. I f the blue Is transferred to the center of
valve face, contact is satisfactory, i f the blue is trans­
ferred to the top edge of Valve face, lower valve seat
with a 15° stone. I f the blue is transferred to bottom
edge of valve face raise valve seat with a 60° stone.
(4) When seat Is properly positioned the width of
valve seats should be 1.016-1.524 mm (0.040-0.060
Inch).
VALVE SPRING INSPECTION
Whenever valves have been removed for inspection,
reconditioning or replacement, valve springs should
be tested. As an example the compression length of
the spring to be tested is
1 - 5 / 1 6
inch. Turn table of
Universal Valve Spring Tester Tool until surface is in
line with the
1 - 5 / 1 6
inch mark on the threaded stud.
Be sure the zero mark is to the front (Fig. 6 2 ) . Place
spring over stud on the table and lift compressing
lever to set tone device. Pull on torque wrench until
ping is heard. Take reading on torque wrench at this
instant. Multiply this reading by 2 . This will give the
spring load at test length. Fractional measurements
are indicated on the table for finer adjustments.
Refer to specifications to obtain specified height and
allowable tensions. Discard the springs that do not
meet specifications.
VALVE SPRING
TESTER
9509-79
Fig. 62 Testing Valve Spring for Compressed
Length
CYLINDEi BLOCK
Remove the engine assembly from the vehicle.
DISASSEMBLE
( 1 ) Remove the cylinder head and valve train.
( 2 ) Remove the intake system.
(3) Remove the timing cover and timing chain with
sprockets.
(4) Remove the oil pan.
( 5 ) Remove the piston-connecting rod assemblies.
( 6 ) Remove the crankshaft and bearings.
ASSEMBLE
( 1 ) Install crankshaft and bearings.
(2) Install the piston/connecting rod assembly
(3) Install the oil pan.
^ (4) Install timing cover, timing chain and sprock­
ets.
• ( 5 ) Install the cylinder head and valve train.
(6) Install the engine into the vehicle.
(7) Install intake system.
C L E A N I N G A N D I N S P E C T I O N
CYLINDEi HEAPS
CLEANING
Clean all surfaces of cylinder block and cylinder
heads. Be sure material does not fall into the lifters
and surrounding valley.
Clean cylinder block front and rear gasket surfaces
using a suitable solvent.
Clean the exhaust manifold to cylinder head mat­
ing areas.
INSPECTION
Imped all surfaces with a straightedge i f there is
any reason to suspect leakage. The out-of-flatness