Dodge Viper SRT-10 (ZB). Manual — part 177
(4) Run the transmission to oil pan bolts in finger
tight (Fig. 68).
(5) Torque 5/16–18 oil pan bolts to 23 N·m (200 in.
lbs.). Torque 1/4–20 oil pan bolts to 11 N·m (95 in
lbs.).
(6) Torque transmission to oil pan bolts to 23 N·m
(200 in. lbs.) (Fig. 68).
(7) Install fasteners securing A/C line to oil pan.
(8) Install flywheel inspection cover.
(9) Lower vehicle.
(10) Fill the crankcase with oil to proper level.
OIL PUMP
REMOVAL
NOTE: The oil pump is serviced with the timing
chain cover (Fig. 70).
(1) Remove timing chain cover (1) (Refer to 9 -
ENGINE/VALVE TIMING/TIMING CHAIN COVER -
REMOVAL).
(2) Disassemble
oil
pump
(3)
(Refer
to
9
-
ENGINE/LUBRICATION/OIL PUMP - DISASSEM-
BLY).
(3) Inspect oil pump parts (Refer to 9 - ENGINE/
LUBRICATION/OIL PUMP - INSPECTION).
DISASSEMBLY
(1) Remove oil pump cover screws (1) and lift off
cover (Fig. 71).
(2) Remove pump rotors.
Fig. 70 Timing Chain Cover and Oil Pump
1 - TIMING CHAIN COVER
2 - SEAL
3 - OIL PUMP
Fig. 71 Oil Pump Cover Screws
1 - SCREWS
Fig. 72 Oil Pressure Relief Valve
1 - OIL PRESSURE RELIEF VALVE
2 - SPRING
3 - PLUG WITH O-RING
9 - 50
ENGINE
ZB
OIL PAN (Continued)
(3) Remove oil pressure relief valve (1) and spring
(2) (Fig. 72).
(4) Wash all parts in a suitable solvent and inspect
carefully for damage or wear.
CLEANING
Clean all parts thoroughly. Mating surface of the
chain case cover should be smooth. Replace pump
cover if scratched or grooved.
INSPECTION
(1) Lay a straightedge (1) across the pump cover
surface (Fig. 73). If a 0.076 mm (0.003 in.) feeler
gauge (2) can be inserted between cover and straight
edge, cover should be replaced.
(2) Measure thickness and diameter of rotors. if
the outer rotor diameter is 82.45 mm (3.246 in.) or
less, replace rotor set (Fig. 74) and (Fig. 75).
(3)
If either rotor thickness measures 18.92 mm
(0.744 in.) or less, replace rotor set
(4) Measure clearance between outer rotor (2) and
case (Fig. 76). If measurement is 0.19 mm (0.007 in.)
or more, and outer rotor (2) is within specification,
replace chain case cover.
Fig. 73 Checking Oil Pump Cover Flatness - Typical
1 - STRAIGHT EDGE
2 - FEELER GAUGE
3 - OIL PUMP COVER
Fig. 74 Measuring Outer Rotor Thickness
Fig. 75 Measuring Inner Rotor Thickness
Fig. 76 Measuring Outer Rotor Clearance in Case
1 - FEELER GUAGE
2 - OUTER ROTOR
ZB
ENGINE
9 - 51
OIL PUMP (Continued)
(5) Measure clearance between the outer rotor (2)
and inner rotor (3) (Fig. 77). If clearance between
inner (3) and outer rotors (2) is 0.150 mm (0.006 in.)
or more, replace rotor set.
(6) Place a straightedge across the face of the chain
case cover, in between the bolt holes. If a feeler gauge of
0.077 mm (0.003 in.) or more can be inserted between
rotors and the straightedge, and the rotors are within
specification, replace the case cover.
(7) Inspect oil pressure relief valve for scoring and
free operation in its bore. Small marks may be
removed with 400 grit wet or dry sandpaper.
(8) The relief valve spring has a free length of
approximately 68.7 mm (2.70 in.) and should test
between 10.2 kg and 12.4 kg (22.5 and 27.5 lbs.)
when compressed to 57 mm (2.24 in.). Replace spring
that fails to meet specifications.
(9) If oil pressure is low and pump is within spec-
ifications, inspect for worn engine bearings or other
reasons for oil pressure loss.
ASSEMBLY
(1) Assemble pump using new parts as required.
(2) Install spring (2) onto oil pressure relief valve (1).
(3) Lubricate oil pressure relief valve and spring
with clean engine oil.
(4) Install oil pressure relief valve (1) and spring (2).
(5) Inspect relief valve plug o-ring (3). Replace as
necessary. Torque plug to 34 N·m (25 ft. lbs.) (Fig. 72)
(6) Install pump rotors with chamfer side to the
inside of chain case cover.
(7) Install oil pump cover and screws (1). Tighten
cover screws to 23 N·m (200 in. lbs.) (Fig. 71).
(8) Prime oil pump before installation by filling
rotor cavity with engine oil.
Fig. 77 Measuring Clearance Between Rotors
1 - FEELER GUAGE
2 - OUTER ROTOR
3 - INNER ROTOR
Fig. 78 Oil Pressure Relief Valve INSTALL
1 - OIL PRESSURE RELIEF VALVE
2 - SPRING
3 - PLUG WITH O-RING
Fig. 79 Oil Pump Cover Screws
1 - SCREWS
9 - 52
ENGINE
ZB
OIL PUMP (Continued)
INSTALLATION
(1) Assemble oil pump (Refer to 9 - ENGINE/LU-
BRICATION/OIL PUMP - ASSEMBLY).
(2) Prime oil pump before installation by filling
rotor cavity with engine oil.
(3) Install
timing
chain
cover
(Refer
to
9
-
ENGINE/VALVE TIMING/TIMING CHAIN COVER -
INSTALLATION).
(4) Install NEW oil filter.
(5) Fill the crankcase with oil to proper level.
OIL PRESSURE SENSOR
REMOVAL
(1) Disconnect oil pressure sensor electrical con-
nector.
(2) Remove oil pressure sensor (Fig. 80).
INSTALLATION
(1) Apply thread sealer to oil pressure sensor
threads.
(2) Install oil pressure sensor (Fig. 80).
(3) Connect electrical connector.
SENSOR-OIL TEMPERATURE
REMOVAL
(1) Disconnect oil temperature sensor electrical
connector.
(2) Remove oil temperature sensor (Fig. 80).
INSTALLATION
(1) Apply thread sealer to oil temperature sensor
threads.
(2) Install oil temperature sensor (Fig. 80).
(3) Connect electrical connector.
ENGINE BLOCK
DESCRIPTION
The cylinder block is made of a sand-cast alumi-
num alloy. The cylinder block has interference-fit cast
iron cylinder liners. The cylinder liners are thermally
installed during block manufacturing; they are not
serviceable items.
Six iron main bearing caps use four bolts per cap;
two vertical and two horizontal. A crankshaft oil
scraper is attached to the main bearing caps via
extended main bearing cap bolts and nuts.
STANDARD PROCEDURE - CYLINDER BORE
HONING
Before honing, stuff plenty of clean shop towels
under the bores and over the crankshaft to keep
abrasive materials from entering the crankshaft
area.
(1) Used carefully, the Cylinder Bore Sizing Hone
C-823, equipped with 220 grit stones, is the best tool
for this job. In addition to deglazing, it will reduce
taper and out-of-round, as well as removing light
Fig. 80 Oil Pressure Sensor and Oil Temperature Sensor
1 - OIL PRESSURE SENSOR
2 - OIL TEMPERATURE SENSOR
Fig. 81 Cylinder Bore Crosshatch Pattern
1 - CROSSHATCH PATTERN
2 - INTERSECT ANGLE
ZB
ENGINE
9 - 53
OIL PUMP (Continued)
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