Dodge Viper SRT-10 (ZB). Manual - part 51

ADDING ADDITIONAL COOLANT

WARNING: THE WARNING WORDS “DO NOT OPEN
HOT” ON THE PRESSURE CAP IS A SAFETY PRE-
CAUTION. WHEN HOT, PRESSURE BUILDS UP IN
COOLING SYSTEM. TO PREVENT SCALDING OR
INJURY, THE PRESSURE CAP SHOULD NOT BE
REMOVED WHILE THE SYSTEM IS HOT OR UNDER
PRESSURE.

CAUTION: Do not use well water, or suspect water
supply in cooling system. Use only a 50/50 mixture
of the specified ethylene glycol type antifreeze/cool-
ant and distilled water. (Refer to LUBRICATION &
MAINTENANCE/FLUID TYPES - DESCRIPTION).

When additional coolant is needed, it should be

added to the coolant pressure bottle.

For coolant service schedules (Refer to LUBRICA-

TION & MAINTENANCE/MAINTENANCE SCHED-
ULES - DESCRIPTION).

(1) Try squeezing the upper radiator hose to deter-

mine if the cooling system is still pressurized.

(2) Place a shop towel over the pressure cap and

turn to the first stop. Wait to see if any pressure is
released. When no pressure is released, press down
on the cap and turn to the second stop. Remove cap
(Fig. 4).

NOTE: If the coolant pressure bottle is completely
empty, (Refer to 7 - COOLING/ENGINE - STANDARD
PROCEDURE - FILLING COOLING SYSTEM).

(3) If there is some coolant in coolant pressure bot-

tle, slowly fill coolant pressure bottle.

Do Not overfill the coolant pressure bottle. With

the engine cold, the coolant level should be in the
COLD FILL RANGE on coolant pressure bottle (Fig.
3).

Fig. 4 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

7 - 12

ENGINE

ENGINE (Continued)

DRAINING COOLING SYSTEM

WARNING:

NOT

REMOVE

ENGINE

BLOCK

DRAIN

PLUGS,

COOLANT

PRESSURE

BOTTLE

CAP,

OPEN

THE

RADIATOR

DRAINCOCK,

WHEN THE COOLING SYSTEM IS HOT AND UNDER
PRESSURE

BECAUSE

SERIOUS

BURNS

FROM

COOLANT CAN OCCUR.

When servicing the cooling system, it is essential

that coolant does not drip onto the accessory drive
belt and/or pulleys. Shield the belt with shop towels
before working on the cooling system. If coolant con-
tacts the belt or pulley, flush both with clean water.

(1) Remove coolant bottle pressure cap (Fig. 4).
(2) Raise vehicle on hoist.

NOTE: For access to radiator draincock, it is neces-
sary to remove the front extension belly pan (Refer
to 23 - BODY/EXTERIOR/BELLY PAN - REMOVAL)
(Fig. 5).

(3) Open radiator draincock located at the lower

left side of radiator (Fig. 23).

(4) Remove the engine block drain plug(s).

FILLING COOLING SYSTEM

NOTE: Cooling system fill procedure is critical to
overall cooling system performance.

For cooling system capacity, (Refer to LUBRICA-

TION & MAINTENANCE - SPECIFICATIONS -
FLUID CAPACITIES).

(1) Close radiator draincock.
(2) Install engine block drain plugs.
(3) Attach one end of a 6.35 mm (0.250 in.) ID

clear hose that is approximately 1200 mm (48 in.)
long, to the bleed screw (Fig. 6).

(4) Route hose away from the accessory drive belt,

drive pulleys and cooling fan. Place the other end of
hose into a clean container. The hose will prevent
coolant from contacting the accessory drive belt when
bleeding the system during the refilling operation.

Fig. 5 Front Extension Belly Pan

1 - FRAME ASSEMBLY
2 - FRAME BOLTS (4)
3 - FRONT EXTENSION BELLY PAN
4 - FRONT FASCIA

5 - FASCIA BOLTS (9)
6 - HEADLAMP MOUNT SUPPORT
7 - SPRING NUT
8 - HEADLAMP MOUNT SUPPORT BOLTS (4)

ENGINE

7 - 13

ENGINE (Continued)

NOTE: IT IS IMPERATIVE THAT THE COOLING SYS-
TEM AIR BLEED SCREW BE OPENED BEFORE ANY
COOLANT IS ADDED TO THE COOLING SYSTEM.
FAILURE TO OPEN THE BLEED SCREW FIRST
WILL RESULT IN AN INCOMPLETE FILL OF THE
SYSTEM.

(5) Open the cooling system bleed screw (Fig. 6).
(6) Pour a 50/50 mix of Mopar

t Antifreeze/Coolant,

5 Year/100,000 Mile Formula and distilled water into
the coolant pressure bottle (Fig. 7).

(7) Slowly fill the cooling system until a steady

stream of coolant flows from the hose attached to the
bleed screw (Fig. 6).

(8) Close the bleed screw and continue filling sys-

tem to the top of the COLD FILL RANGE (Fig. 8).

(9) Remove hose from bleed screw.
(10) Install cap on coolant pressure bottle.
(11) Start engine and run until it reaches operat-

ing temperature.

(12) If removed, install front belly pan (Refer to 23

- BODY/EXTERIOR/BELLY PAN - INSTALLATION).

NOTE: The engine cooling system will push any
remaining air into the coolant bottle within about an
hour of normal driving. As a result, a drop in cool-
ant level in the pressure bottle may occur.

CLEANING

Drain, flush, and fill the cooling system at the

mileage or time intervals specified (Refer to LUBRI-
CATION

MAINTENANCE/MAINTENANCE

SCHEDULES - DESCRIPTION). If the solution is
dirty, rusty or contains a considerable amount of sed-
iment, clean and flush with clean water. Care should
be taken in disposing of the used engine coolant from
your vehicle. Check governmental regulations for dis-
posal of used engine coolant.

Fig. 6 Cooling System Bleed Screw

1 - ENGINE COOLANT TEMPERATURE (ECT) SENSOR
2 - COOLING SYSTEM BLEED SCREW
3 - CAMSHAFT POSITION SENSOR

Fig. 7 Coolant Pressure Bottle and Cap

1 - PRESSURE CAP
2 - COOLANT PRESSURE BOTTLE

Fig. 8 Cold Fill Range

7 - 14

ENGINE

ENGINE (Continued)

(1) Drain cooling system (Refer to 7 - COOLING/

ENGINE - STANDARD PROCEDURE - DRAINING
COOLING SYSTEM).

(2) Refill cooling system with clean water (Refer to

7 - COOLING/ENGINE - STANDARD PROCEDURE
- FILLING COOLING SYSTEM).

(3) Run engine with pressure cap installed until

upper radiator hose is warm.

(4) Stop engine and drain water from system. If

water is dirty, fill, run and drain system again until
water runs clear.

(5) After system is clean, fill cooling system with

the proper mixture of Mopar

t Antifreeze/Coolant and

distilled water (Refer to 7 - COOLING/ENGINE -
STANDARD PROCEDURE - FILLING COOLING
SYSTEM).

COOLANT

DESCRIPTION - ENGINE COOLANT

WARNING: ANTIFREEZE IS AN ETHYLENE GLYCOL
BASE COOLANT AND IS HARMFUL IF SWAL-
LOWED OR INHALED. IF SWALLOWED, DRINK
TWO GLASSES OF WATER AND INDUCE VOMIT-
ING. IF INHALED, MOVE TO FRESH AIR AREA.
SEEK MEDICAL ATTENTION IMMEDIATELY. DO NOT
STORE IN OPEN OR UNMARKED CONTAINERS.
WASH SKIN AND CLOTHING THOROUGHLY AFTER
COMING IN CONTACT WITH ETHYLENE GLYCOL.
KEEP OUT OF REACH OF CHILDREN. DISPOSE OF
GLYCOL BASE COOLANT PROPERLY, CONTACT
YOUR DEALER OR GOVERNMENT AGENCY FOR
LOCATION OF COLLECTION CENTER IN YOUR
AREA. DO NOT OPEN A COOLING SYSTEM WHEN
THE ENGINE IS AT OPERATING TEMPERATURE OR
HOT UNDER PRESSURE, PERSONAL INJURY CAN
RESULT. AVOID RADIATOR COOLING FAN WHEN
ENGINE COMPARTMENT RELATED SERVICE IS
PERFORMED, PERSONAL INJURY CAN RESULT.

CAUTION: Use of Propylene Glycol based coolants
is not recommended, as they provide less freeze
protection and less boiling protection.

The cooling system is designed around the coolant.

The coolant must accept heat from engine metal, in
the cylinder head area near the exhaust valves and
engine block. Then coolant carries the heat to the
radiator where the tube/fin radiator can transfer the
heat to the air.

The use of aluminum cylinder blocks, cylinder heads,

and water pumps requires special corrosion protection.
Mopar

t Antifreeze/Coolant, 5 Year/100,000 Mile For-

mula (MS-9769), or the equivalent ethylene glycol base
coolant with hybrid organic corrosion inhibitors called
HOAT, (Hybrid Organic Additive Technology) is recom-
mended. This coolant offers the best engine cooling
without corrosion when mixed with 50% Ethylene Gly-
col and 50% distilled water to obtain a freeze point of
-37°C (-35°F). If it loses color or becomes contaminated,
drain, flush, and replace with fresh properly mixed cool-
ant solution.

The green coolant MUST NOT BE MIXED with

the orange or magenta coolants. When replacing cool-
ant the complete system flush must be performed
before using the replacement coolant.

CAUTION:

Mopar

Antifreeze/Coolant,

Year/100,000 Mile Formula (MS-9769) may not be
mixed with any other type of antifreeze. Doing so
will reduce the corrosion protection and may result
in premature water pump seal failure. If non-HOAT
coolant is introduced into the cooling system in an
emergency, it should be replaced with the specified
coolant as soon as possible.

DIAGNOSIS AND TESTING - COOLANT
CONCENTRATION TESTING

Coolant concentration should be checked when any

additional coolant was added to system or after a
coolant drain, flush and refill. The coolant mixture
offers optimum engine cooling and protection against
corrosion when mixed to a freeze point of -37°C
(-35°F) to -46°C (-50°F). The use of a hydrometer or a
refractometer can be used to test coolant concentra-
tion.

A hydrometer will test the amount of glycol in a

mixture by measuring the specific gravity of the mix-
ture. The higher the concentration of ethylene glycol,
the larger the number of balls that will float, and
higher the freeze protection (up to a maximum of
70% by volume glycol).

A refractometer will test the amount of glycol in a

coolant mixture by measuring the amount a beam of
light bends as it passes through the fluid.

Some coolant manufactures use other types of gly-

cols into their coolant formulations. Propylene glycol
is the most common new coolant. However, propylene
glycol based coolants do not provide the same freez-
ing protection and corrosion protection and is only
recommended for limited usage. Refer to appropriate
Technical Service Bulletin(s) regarding use of propy-
lene glycol based coolants.

CAUTION: Do not mix types of coolant—corrosion
protection will be severely reduced.

ENGINE

7 - 15

ENGINE (Continued)

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