Dodge ram truck 3500 1996 Service Manual page 1107

BR 5 J L ENGINE 9 - 1 1 7
DISASSEMBLY AND ASSEMBLY
( C o n t i n u e d )
CONTACT
POINT
4 5 7 / - 4 5 7 /
A - SEAT WIDTH - INTAKE 1.016- 1.524 mm (0.040 - 0.060 in.)
EXHAUST 1.524 - 2.032 mm (0.060 - 0.080 in.)
B - FACE ANGLE (INTAKE & EXHAUST) 4 3 7 / - 4 3 7 /
C - SEAT ANGLE (INTAKE & EXHAUST) 4 4 7 / - 4 4 7 /
D - CONTACT SURFACE
J9309-95
Fig. 53 Vaive Face and Seat Angles
J L
INTAKE
VALVE
F A C E '
- STEM *
VALVE SPRING
RETAINER LOCK
GROOVE
EXHAUST
VALVE
J 9 2 0 9 - 1 2 7
Fig. 54 Intake and Exhaust Valves
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 transferred 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
intake seats should be 1.016-1.524 mm (0.040-0.060
inch). The width of the exhaust seats should be
1.524-2.032 mm (0.060-0.080 inch).
WAIVE S P R I N G INSPECTION
Whenever valves have been removed for inspection,
reconditioning or replacement, valve springs should
REFACING STONE
/ MUST NOT CUT
/ / VALVE SHROUD
RK635
VALVE SEAT
Fig. 55 Refacing Valve Seats
be tested. As an example the compression length of
the spring to be tested is 1-5/16 inch. Turn table of
Universal Valve Spring Tester Tool until surface is in
line with the 1-5/16 inch mark on the threaded stud.
Be sure the zero mark is to the front (Fig. 56). 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.
TORQUE
WRENCH
VALVE SPRING
TESTER
9509-79
Fig. 56 Testing Vaive Spring for Compressed Length
OIL P U i P
DISASSEMBLE
(1) Remove the relief valve as follows:
(a) Remove cotter pin. Drill a 3.175 mm (1/8
inch) hole into the relief valve retainer cap and
insert a self-threading sheet metal screw.
(b) Clamp screw into a vise and while support­
ing oil pump, remove cap by tapping pump body