Service Manual

ISB, ISBe and QSB (Common Rail [...] Cooling System
Section 8 - Cooling System - Group 08 Page 8-31
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WARNING
Do not remove the pressure cap from a hot engine.
Wait until the coolant temperature is below 50°C
[120°F] before removing the pressure cap. Heated
coolant spray or steam can cause personal injury.
CAUTION
Do not use the coolant replacement tool to evacuate
contaminated coolant or a system that is suspected
of contamination. This could result in cross
contamination of coolant. The coolant drain method
should be used for removing contaminated coolant.
Reference the manufacturer’s manual for specific
instructions on cleaning the tool of contaminants.
NOTE: Refer to the OEM service manual for special
coolant drain requirements. Special instructions may also
be located near the cooling system access point or fill
door on the vehicle.
Isolate the engine from the vehicle cooling system by
closing coolant flow valves to the equipment heating
systems before starting the repair. This will prevent the
heater circuit from draining, minimizing the chance for air
pockets to be present during the fill process.
This air can be very difficult to purge in some applications
with several feet of plumbing and multiple heater cores.
Remove the radiator cap.
WARNING
Coolant is toxic. Keep away from children and pets. If
not reused, dispose of in accordance with local
environmental regulations.
The coolant replacement tool tank capacity of 68 liter [18
gal] is adequate for most applications. An additional
storage tank can be used for cooling system packages
with more than 68 liter [18 gal] capacity.
Be sure there is no air pressure in the coolant
replacement tool tank by opening the pressure relief valve
(1) located on the control block of the coolant replacement
tool.
Connect the coolant replacement tool to a shop air supply
regulated at 621 kPa [90 psi].
Switch the coolant replacement tool control lever (1) to
“VAC” and leave the service hose valve (2) closed. This
will create a vacuum in the tank to evacuate coolant from
the cooling system package.
Monitor the gauge (3) and build a vacuum of
approximately 508 mm-Hg [20 in-Hg] in the coolant
replacement tool tank. Once the vacuum has been
achieved, move the control valve lever (1) to the middle
position.
Maintain approximately a 508 mm-Hg [20 in-Hg] vacuum
to achieve a faster drain.