Coolant Surge Tank Pressure Cap; Engine Overheating - Oldsmobile Aurora 2003 Owner's Manual

Coolant Surge Tank Pressure Cap

The cooling system pressure cap is located on
the surge tank.
Notice: Your cooling system pressure cap is a
pressure-type cap and must be tightly installed to
prevent coolant loss and possible engine damage
from overheating.

Engine Overheating

You will find a coolant temperature gage on your
vehicle's instrument panel. Your Driver Information
Center (DIC) will also display messages about engine
overheating. See Engine Coolant Temperature Gage
on page 3-38 .
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Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
message HOT STOP ENGINE is displayed, an overheat
protection mode which alternates firing groups of
cylinders helps prevent engine damage. In this mode,
you will notice a loss in power and engine performance.
This operating mode allows your vehicle to be driven
to a safe place in an emergency. Driving extended miles
(km) and/or towing a trailer in the overheat protection
mode should be avoided.
Notice: After driving in the overheated engine
protection operating mode, to avoid engine damage,
allow the engine to cool before attempting any repair.
The engine oil will be severely degraded. Repair the
cause of coolant loss, change the oil and reset the oil
life system. See "Engine Oil" in the Index.