2003 Buick Century Owner's Manual - Page 242

Radiator Pressure Cap Nofice: Your radiator cap is a pressure-type cap and must be tightly installed to prevent coolantloss and possible enginedamage from overheating. Be sure the arrows on the cap line up with the overflow tube on the radiator filler neck. The radiator pressure cap is located near the front of the engine compartment on the passenger's side of the vehicle. See Engine CompartmentOverview on page 5-12 for more information on location. Overheated Engine Protection Operating Mode This emergency operating mode allows your vehicle to be driven to a safe place in an emergency situation. If an overheated engine condition exists, an overheat protection mode which alternates firing groups of cylinders helps prevent engine damage. In this mode, you will notice a significant loss in power and engine performance. The low coolant light may come on and the temperature gage will indicate an overheat condition exists. Driving extended miles (km) and/or towing a trailer in the overheat protection mode should be avoided. Engine Overheating You will find a coolant temperature gage and a hot engine warning light on your instrument panel. See Engine Coolant Temperature Gage on page 3-35 and Engine Coolant Temperature Warning Light on page 3-34. Ndiee: After driving ir; the overhecited engine protection operatingmode, to avoid enginedamage, allow the engine to cool before attempting any repair. The engine oil will be severely degraded. Repair the cause of coolantloss, change the oil and reset the oil life system. See "Engine Oil" in the Index. 5-25