Engine Overheating - Cadillac XT4 Owner's Manual

3. If topping up the level in the
coolant surge tank, add the proper
mixture until the level reaches the
mark on the front of the tank and
replace the cap. Operate the
vehicle. Repeat steps 1 3, as
necessary.
If filling the system (such as after
servicing), follow the Automatic
Coolant Service Filling Instructions.
Caution
If the pressure cap is not tightly
installed, coolant loss and engine
damage may occur. Be sure the cap
is properly and tightly secured.
Automatic Coolant Service
Filling Instructions
It is recommended to take Diesel
engine vehicles to the retailer for
coolant system servicing. However,
if that is not possible, the vehicle is
equipped with an Automatic Coolant
Service Fill feature.
To fill the system, use the following
steps:
1. With a cold system, add coolant to
the indicated mark on the
surge tank.
2. Turn the ignition on. See Ignition
Positions 0 205.
3. Turn off the air conditioning.
4. Apply the parking brake.
5. At the same time, depress the
accelerator and the brake pedals for
two seconds, then release.
6. Start the vehicle within five to
10 seconds.
7. Idle for three minutes while adding
fluid as the level drops below the
indicated mark on the surge tank.
VEHICLE CARE
8. Reinstall the cap and run the
engine at 2000 RPM for 10 minutes
while watching the coolant
temperature gauge to be sure the
temperature has risen but is not
overheating.
If the temperature has not risen or
the temperature is indicating
overheating, stop the process by
returning to idle and turning off
the engine. Then return to Step 1.
If the coolant filling process cannot
be completed without overheating,
see your retailer for assistance.
If the temperature has risen and is
not overheating, proceed to Step 9.
9. Idle the engine for two minutes
before turning off and allowing the
engine to cool down.
10. Allow the system to completely
cool down and make a note of the
level of the coolant in the surge
tank. If low, add fluid to the
indicated mark and repeat
Steps 3 9.

Engine Overheating

The vehicle has several indicators to
warn of the engine overheating.
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