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7 - 12
ENGINE
COOLANT (Continued)
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 PLUG OR LOOSEN THE RADIATOR
DRAIN PLUG 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 left/
lower side of radiator.
(2) Attach one end of a hose to the draincock (Fig. 3).
Put the other end into a clean and appropriately
marked container. Open draincock and drain coolant
from radiator. This will empty the coolant recovery pres-
sure container first. The coolant does not have to be
removed from the container unless the system is being
refilled with a fresh mixture. When container is empty,
remove cap and continue draining cooling system.
1 - DRAIN HOSE
2 - ENGINE DRAIN PLUG
block drain plug located on the side of cylinder block
(Fig. 3).
STANDARD PROCEDURE - REFILLING
COOLING SYSTEM
block drain plug(s) (if removed). Tighten the engine
drain plug to 22 lbs. ft. (30 N·m)
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
COLD MINIMUM mark.
operate engine with container cap in place.
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.
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 COLD MINIMUM mark after
each cool down period.
Fig. 3 DRAINING COOLANT SYSTEM
3 - RADIATOR DRAIN PLUG
4 - DRAIN HOSE
To drain the engine of coolant, loosen the cylinder
(1) Tighten the radiator drain and the cylinder
(2) Fill system using a 50/50 mixture of ethylene-
(3) With heater control unit in the HEAT position,
(4) After engine has reached normal operating
(5) Add coolant to pressure container as necessary.
VA
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