
MAINTAINING YOUR VEHICLE
CONTENTS
m8.3L Engine Compartment................144
mOnboard Diagnostic System (OBD II).........145
mEmissions Inspection And Maintenance
Programs............................146
mReplacement Parts......................147
mDealer Service.........................147
mMaintenance Procedures..................148
NEngine Oil..........................148
NDrive Belts Ð Check Condition And Tension . . 152NSpark Plugs.........................152
NCatalytic Converter....................153
NIgnition Wiring System And Ignition Timing . . 154
NCrankcase Emission Control System........155
NAir Cleaner Filter.....................155
NMaintenance-Free Battery................156
NBattery Save Feature...................158
NAir Conditioner......................160
7

Manual for the proper procedure to be followed for
checking ignition cable resistance. Cracked, damaged, or
faulty cables should be replaced.
Because of the plastic body shell on your Viper, ignition
cables should be replaced with the specially designed RFI
cables available at your dealer.
Ignition timing cannot be set on this vehicle.
Crankcase Emission Control System
Proper operation of this system depends on freedom
from plugging due to deposits. As vehicle mileage builds
up, the Crankcase Ventilation Valve orifice may accumu-
late deposits. If a valve is not working properly, replace it
with a new orifice. DO NOT ATTEMPT TO CLEAN THE
OLD ORIFICE!
Check the ventilation hose for indication of damage or
plugging deposits. Replace if necessary.
Air Cleaner Filter
Under normal driving conditions, replace the air filter at
the intervals shown on ªMaintenance Schedule Aº. If,
however, you drive the vehicle frequently under dusty or
severe conditions, the filter element should be inspected
periodically and replaced if necessary at the intervals
shown in ªMaintenance Schedule Bº.
WARNING!
The air cleaner can provide protection if the engine
backfires. Do not remove the air cleaner unless such
removal is necessary for repair or maintenance.
Make sure that no one is near the engine compart-
ment before starting the vehicle with the air cleaner
removed. Failure to do so can result in serious
personal injury.
MAINTAINING YOUR VEHICLE 155
7

1. Press the driver's door exterior handle to wake up the
vehicle.
2. If the door does not open (vehicle is armed) press the
remote keyless entry unlock button to unlock the vehicle.
3. Press the driver's door exterior handle again to open
the door.
4. Cycle the Ignition to ON/RUN. If the ignition is NOT
cycled to ON/RUN, then the vehicle will re-enter Battery
Save Mode 45 seconds after the driver's door is closed.
Air Conditioner
Check the air conditioning system operation at the start
of the warm weather season.
NOTE:If air conditioning operation seems to be lower
than expected, check the front of the A/C condenser,
located in front of the radiator for dirt or insect accumu-
lation. Clean with a gentle water spray as required. Frontend fascia protectors may reduce air flow to the con-
denser and radiator, reducing A/C and engine cooling
performance.
WARNING!
The air conditioning system contains refrigerant
under high pressure. To avoid risk of personal injury
or damage to the system, adding refrigerant or any
repair requiring lines to be disconnected should be
done by an experienced repairman.
Refrigerant Recovery and Recycling
The air conditioning system of your vehicle contains
R-134a, a refrigerant that does not deplete the ozone layer
in the upper atmosphere. The manufacturer recommends
that air conditioning service be done by facilities using
refrigerant recycling and recovery equipment that meets
SAE standard J1991.
160 MAINTAINING YOUR VEHICLE

When additional coolant is needed to maintain the
proper level, it should be added to the coolant recovery
bottle.
Points to Remember
²
Do not overfill the bottle.
²Check coolant freeze point in the coolant bottle. If
antifreeze needs to be added, contents of the coolant
bottle also must be protected against freezing.
²If frequent coolant additions are required, or if the
level in the bottle does not drop when the engine cools,
the cooling system should be pressure tested for leaks.
²Maintain coolant concentration of 50% ethylene glycol
(minimum) with recommended antifreeze for proper
corrosion protection of your engine that contains alu-
minum components.
²Make sure that the radiator and bottle overflow hoses
are not kinked or obstructed.
²Keep the front of the radiator clean. If your vehicle has
air conditioning, keep the front of the condenser clean
also.
²Do not change the thermostat for summer or winter
operation. If replacement is ever necessary, install
ONLY the correct type thermostat. Other designs may
result in unsatisfactory cooling performance.
Hoses and Vacuum/Vapor Harnesses
Inspect surfaces of hoses and nylon tubing for evidence
of heat and mechanical damage. Hard or soft spots,
brittle rubber, cracking, checking, tears, cuts, abrasions,
and excessive swelling suggest deterioration of the rub-
ber. Pay particular attention to those hoses nearest to
high heat sources such as the exhaust manifold. Inspect
170 MAINTAINING YOUR VEHICLE

Carpeting
Vacuum your carpeting regularly to prevent a soil
buildup. Shampoo soiled carpeting with a reliable uphol-
stery cleaner, using a natural sponge or soft bristle brush.
After carpeting dries, vacuum it thoroughly.
Underbody Maintenance
The corrosive materials used for ice and snow removal or
dust control may accumulate on the underbody of your
vehicle. If not removed, these materials may accelerate
rusting and deterioration of underbody components such
as fuel lines, frame, floor pan, exhaust system, etc.
At least twice during the winter months hose down the
wheel wells and underside of the vehicle. Make sure you
remove mud and salt from panels, crevices and ledges,
and that all drain holes and channels are free of debris.
NOTE:You can do more harm by hosing off the vehicle
without removing caked mud and debris.
The frame of your Viper is galvanized for rust-through
protection. It is also dipped in a black E-Coat to protect the
welded areas. Avoid any scratches through to bare metal.
Commercial Car Washes
We do not recommend that you take your Viper through
a commercial car wash.
In the event that you do take your Viper to a commercial
car wash, move the Heater/Air Conditioning blower
control to the lowest setting. This will prevent the possi-
bility of water entering the system.
CAUTION!
The tires on your Viper are wider than the guide
tracks on most washes and the low ground clearance
of your vehicle may not be compatible with some car
wash equipment. You could damage your vehicle.
MAINTAINING YOUR VEHICLE 179
7

EMISSION CONTROL SYSTEM MAINTENANCE
The ªScheduledº maintenance services, listed inbold
typemust be done at the times or mileages specified to
assure the continued proper functioning of the emission
control system. These, and all other maintenance services
included in this manual, should be done to provide best
vehicle performance and reliability. More frequent main-
tenance may be needed for vehicles in severe operating
conditions such as dusty areas and very short trip
driving.
Inspection and service also should be done any time a
malfunction is suspected.
NOTE:Maintenance, replacement, or repair of the emis-
sion control devices and systems on your vehicle may be
performed by any automotive repair establishment or
individual using any automotive part which has been
certified pursuant to U.S. EPA or, in the State of Califor-
nia, California Air Resources Board regulations.
MAINTENANCE SCHEDULES
There are two maintenance schedules that show the
requiredservice for your vehicle.
First is ScheduleªBº. It is for vehicles that are operated
under the conditions that are listed below and at the
beginning of the schedule.
²Day or night temperatures are below 32É F (0É C).
²Stop and go driving.
²Extensive engine idling.
²Driving in dusty conditions.
²Short trips of less than 10 miles (16 km).
²More than 50% of your driving is at sustained high
speeds during hot weather, above 90É F ( 32É C).
²Trailer towing.L
200 MAINTENANCE SCHEDULES
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11786.1............................... 111
1819................................. 109
ABS (Anti-Lock Brake) System............... 75
Accessory Delay, Power..................13,24
Adding Engine Coolant (Antifreeze).......... 168
Adding Fuel........................... 129
Additives, Fuel......................... 129
Adjustable Pedals........................ 66
Aiming Headlights....................... 193
Air Cleaner, Engine...................... 155
Air Conditioning......................90,160
Air Conditioning Refrigerant............... 160
Air Pressure, Tires....................... 117
Airbag................................ 38
Airbag Deployment....................... 42
Airbag Light..........................41,79
Airbag Maintenance....................... 45
Airbag On/Off Switch...................34,43Alarm................................ 19
Alignment and Balance................... 123
Alterations/Modifications, Vehicle............. 7
Antenna............................... 90
Antifreeze Disposal...................... 167
Antifreeze (Engine Coolant)..............167,168
Capacities........................... 195
Anti-Lock Warning Light................... 75
Appearance Care........................ 177
Auto Down Power Windows................ 24
Automatic Door Locks..................... 15
Ball Joints............................. 162
Battery.............................78,156
Gas Caution.......................... 157
Bearings.............................. 177
Belt System, Six Point..................... 31
Belts, Drive............................ 152
Belts, Seat.............................. 26
226 INDEX