Year/100,000 Mile Formula (glycol base coolant with
corrosion inhibitors called HOAT, for Hybrid Organic
Additive Technology) is recommended. This coolant
offers the best engine cooling without corrosion when
mixed with 50% distilled water to obtain 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 coolant solution.
CAUTION: Do not use coolant additives that are
claimed to improve engine cooling.
STANDARD PROCEDURE - DRAINING COOLING
SYSTEM
WARNING:
DO
NOT
REMOVE
THE
CYLINDER
BLOCK DRAIN PLUGS OR LOOSEN THE RADIATOR
DRAINCOCK
WITH
SYSTEM
HOT AND
UNDER
PRESSURE. SERIOUS BURNS FROM COOLANT
CAN OCCUR.
(1) DO NOT remove coolant recovery pressure con-
tainer cap first. With engine cold, raise vehicle on a
hoist and locate radiator draincock.
NOTE: Radiator draincock is located on the right/
lower side of radiator facing to rear of vehicle.
(2) Attach one end of a hose to the draincock. Put
the other end into a clean container. Open draincock
and drain coolant from radiator. This will empty the
coolant recovery pressure container first. The coolant
does not have to be removed from the container
unless the system is being refilled with a fresh mix-
ture. When container is empty, remove cap and con-
tinue draining cooling system.
To drain the engine of coolant, remove the cylinder
block drain plug located on the side of cylinder block.
STANDARD PROCEDURE - REFILLING
COOLING SYSTEM
(1) Tighten the radiator drain and the cylinder
block drain plug(s) (if removed).
(2) Fill system using a 50/50 mixture of ethylene-
glycol antifreeze and low mineral content water. Fill
radiator to top and add sufficient coolant to the cool-
ant recovery pressure container to raise level to
FULL mark.
(3) With heater control unit in the HEAT position,
operate engine with container cap in place.
(4) After engine has reached normal operating
temperature, shut engine off and allow it to cool.
When engine is cooling down, coolant will be drawn
into the radiator from the pressure container.
(5) Add coolant to pressure container as necessary.
Only add coolant to the container when the
engine is cold. Coolant level in a warm engine
will be higher due to thermal expansion. To
purge the cooling system of all air, this heat up/cool
down cycle (adding coolant to cold engine) must be
performed three times. Add necessary coolant to raise
container level to the FULL mark after each cool
down period.
COOLANT RECOVERY
PRESSURE CONTAINER
DESCRIPTION
A pressurized, plastic coolant container is used
with this cooling system (Fig. 3). The container is
located at the right-rear side of the engine compart-
ment and is mounted as the highest point of the cool-
ing system.
OPERATION
The location of the container allows any air or
vapor exceeding the pressure/vent cap rating to
escape through the cap. Coolant flows through the
container at all times during engine operation
whether the engine is cold or at normal operating
temperature. The coolant container is equipped with
a pressure/vent cap. For more information (Refer to 7
Fig. 3 COOLANT RECOVERY PRESSURE
CONTAINER
1 - LOW COOLANT LEVEL SENSOR
2 - COOLANT RECOVERY HOSE
3 - COOLANT RECOVERY PRESSURE CONTAINER
4 - OVERFLOW HOSE
7a - 12
ENGINE
WG
COOLANT (Continued)