Dodge Viper SRT-10 (ZB). Manual — part 175
TIMING CHAIN AND
SPROCKETS
REMOVAL
TIMING CHAIN AND CAMSHAFT SPROCKET
REMOVAL
(1) Remove timing chain cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING CHAIN COVER -
REMOVAL).
(2) Rotate crankshaft until timing marks are
aligned (Fig. 60).
(3) Remove the camshaft sprocket attaching bolts
(Fig. 56).
(4) Remove
the
timing
chain
with
camshaft
sprocket.
CRANKSHAFT SPROCKET REMOVAL
(1) Install Special Tool 8194 into end of crankshaft
(Fig. 57). Lubricate the end of Special Tool 8194 with
wheel bearing grease or equivalent.
NOTE: Lubricate the threads of Special Tool 5048
using Mopar
T
Nickel Anti-seize Compound or equiv-
alent,
before
beginning
crankshaft
sprocket
removal.
(2) Using Special Tools 9056 and 5048, remove
crankshaft sprocket (Fig. 58).
Fig. 56 Timing Chain and Sprockets
1 - TIMING CHAIN
2 - BOLT(S)
3 - CAMSHAFT SPROCKET
4 - CRANKSHAFT SPROCKET
Fig. 57 Crankshaft Insert - Special Tool 8194
1 - SPECIAL TOOL 8194
Fig. 58 Crankshaft Sprocket Removal
1 - SPECIAL TOOL 9056
2 - SPECIAL TOOL 5048-6
3 - SPECIAL TOOL 5048-1
9 - 42
ENGINE
ZB
INSTALLATION
CRANKSHAFT SPROCKET INSTALLATION
(1) Position a new crankshaft sprocket on the
crankshaft with timing mark facing out. Align crank-
shaft keyway with slot in crankshaft sprocket.
NOTE: Lubricate the threads of Special Tool 9055
(1) using Mopar
T
Nickel Anti-seize Compound or
equivalent, before beginning crankshaft sprocket
installation.
(2) Install the crankshaft sprocket using Special
Tool 9055 (1) (Fig. 59).
TIMING CHAIN AND CAMSHAFT SPROCKET
INSTALLATION
(1) Rotate the crankshaft sprocket so the timing
mark is at the 12 O’clock position.
(2) Place the timing chain around the camshaft
sprocket and place the timing mark to the 6 O’clock
position.
(3) Place the timing chain around crankshaft
sprocket and install the camshaft sprocket into posi-
tion.
(4) Using straight edge, check alignment of timing
marks (Fig. 60).
(5) Install the camshaft sprocket bolts. Tighten the
bolts to 23 N·m (200 in. lbs.).
(6) Rotate crankshaft 2 revolutions. Timing marks
should line up. If timing marks do not line up,
remove cam sprocket and realign.
(7) Measure camshaft end play. (Refer to 9 -
ENGINE - SPECIFICATIONS). If not within specifi-
cations, install new thrust plate.
(8) Install
timing
chain
cover
(Refer
to
9
-
ENGINE/VALVE TIMING/TIMING CHAIN COVER -
INSTALLATION).
LUBRICATION
DESCRIPTION
The engine lubrication system is a full-flow filtra-
tion pressure feed type.
OPERATION
Engine oil stored in the oil pan is taken in and dis-
charged by an internal gear type oil pump, which is
driven by the crankshaft. A pressure relief valve is
located in the timing chain case cover; it regulates oil
pressure. The oil is pumped through an oil filter and
feeds a main oil gallery. Also, oil is routed to an
external oil cooler. The main oil gallery feeds oil
under pressure to the main bearings, connecting rod
bearings, and camshaft bearings. Passages in the cyl-
inder block feed oil to the hydraulic lifters. The oil
then flows through hollow pushrods, which feed the
rocker arm pivots.
Fig. 59 Crankshaft Sprocket Installation
1 - SPECIAL TOOL 9055
Fig. 60 Alignment of Timing Marks
ZB
ENGINE
9 - 43
TIMING CHAIN AND SPROCKETS (Continued)
DIAGNOSIS AND TESTING
CHECKING ENGINE OIL PRESSURE
(1) Remove oil pressure sensor (Refer to 9 -
ENGINE/LUBRICATION/OIL PRESSURE SENSOR
- REMOVAL).
(2) Install oil pressure gauge.
(3) Warm engine at high idle until thermostat
opens.
CAUTION: If oil pressure is 0 at idle, Do Not Run
engine at 3000 RPM.
(4) Oil pressure should be 68.9 kPa (10 psi) at idle
or 310 - 517 kPa (45 - 75 psi) at 3000 RPM.
(5) If oil pressure is 0 at idle, shut off engine.
Check for a clogged oil pick-up screen or a pressure
relief valve stuck open.
ENGINE OIL LEAK
Begin with a thorough visual inspection of the
engine, particularly at the area of the suspected leak.
If an oil leak source is not readily identifiable, the
following steps should be followed:
(1) Do not clean or degrease the engine at this
time because some solvents may cause rubber to
swell, temporarily stopping the leak.
(2) Add an oil soluble dye (use as recommended by
manufacturer). Start the engine and let idle for
approximately 15 minutes. Check the oil dipstick to
make sure the dye is thoroughly mixed as indicated
with a bright yellow color under a black light.
(3) Using a black light, inspect the entire engine
for fluorescent dye, particularly at the suspected area
of oil leak. If the oil leak is found and identified,
repair per service manual instructions.
(4) If dye is not observed, drive the vehicle at var-
ious speeds for approximately 24 km (15 miles), and
repeat inspection.If the oil leak source is not pos-
itively identified at this time, proceed with the air
leak detection test method.
Air Leak Detection Test Method
(1) Remove the PCV valve from the IAFM. Cap or
plug the PCV valve grommet.
(2) Attach an air hose with pressure gauge and
regulator to the dipstick tube.
CAUTION: Do not subject the engine assembly to
more than 20.6 kPa (3 PSI) of test pressure.
(3) Gradually apply air pressure from 6.89 - 17.23
kPa (1 - 2.5 psi) maximum while applying soapy
water at the suspected source. Adjust the regulator
to the suitable test pressure that provide the best
bubbles which will pinpoint the leak source. If the oil
leak is detected and identified, repair per service
manual procedures.
(4) If the leakage occurs at the rear oil seal area,
refer to the section, Inspection for Rear Seal Area
Leak.
(5) If no leaks are detected, turn off the air supply
and remove the air hose and all plugs and caps.
Install the PCV valve.
(6) Clean the oil off the suspect oil leak area using
a suitable solvent. Drive the vehicle at various
speeds approximately 24 km (15 miles). Inspect the
engine for signs of an oil leak by using a black light.
INSPECTION FOR REAR SEAL AREA LEAKS
Since it is sometimes difficult to determine the
source of an oil leak in the rear seal area of the
engine, a more involved inspection is necessary. The
following steps should be followed to help pinpoint
the source of the leak.
If the leakage occurs at the crankshaft rear oil seal
area:
(1) Disconnect the battery.
(2) Raise the vehicle.
(3) Remove torque converter or clutch housing
cover and inspect rear of block for evidence of oil.
Use a black light to check for the oil leak:
(a) Circular spray pattern generally indicates
seal leakage or crankshaft damage.
(b) Where leakage tends to run straight down,
possible causes are a porous block, distributor seal,
camshaft bore cup plugs oil galley pipe plugs, oil
filter runoff, and main bearing cap to cylinder
block mating surfaces.
(4) If no leaks are detected, pressurize the crank-
case as outlined in the, Inspection (Engine oil Leaks
in general)
CAUTION: Do not exceed 20.6 kPa (3 psi).
(5) If the leak is not detected, very slowly turn the
crankshaft and watch for leakage. If a leak is
detected between the crankshaft and seal while
slowly turning the crankshaft, it is possible the
crankshaft seal surface is damaged. The seal area on
the crankshaft could have minor nicks or scratches
that can be polished out with emery cloth.
CAUTION: Use extreme caution when crankshaft
polishing is necessary to remove minor nicks and
scratches. The crankshaft seal flange is especially
machined to complement the function of the rear oil
seal.
(6) For bubbles that remain steady with shaft
rotation, no further inspection can be done until dis-
assembled.
9 - 44
ENGINE
ZB
LUBRICATION (Continued)
OIL
STANDARD PROCEDURE
CHECKING ENGINE OIL LEVEL
The best time to check engine oil level is after the
vehicle has sat overnight. If the engine has been run-
ning, allow the engine to be shut off for at least 5
minutes before checking oil level.
Checking the oil while the vehicle is on level
ground will improve the accuracy of the oil level
reading. Remove the engine oil dipstick (Fig. 61). The
dipstick is calibrated for 2 quarts within the SAFE
zone (Fig. 62).
Fig. 61 Fluid Level Service Locations
1 - COOLANT PRESSURE CAP
2 - ENGINE OIL FILL
3 - BRAKE FLUID RESERVOIR
4 - CLUTCH FLUID RESERVOIR
5 - POWER STEERING FLUID
6 - ENGINE OIL DIPSTICK
7 - WINDSHIELD WASHER FLUID RESERVOIR
Fig. 62 Engine Oil Level
1 - ENGINE OIL DIPSTICK
ZB
ENGINE
9 - 45
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