1998 Toyota T100 Owners Manual - Page 59

T100(U) Oil pressure gauge NOTICE Do not drive the vehicle with the oil pressure below the normal range until the cause is fixed-it may ruin the engine. NOTICE z Do not remove the thermostat in the engine cooling system as this may cause the engine to overheat. The thermostat is designed to control the flow of coolant to keep the temperature of the engine within the specified operating range. z Do not continue driving with an overheated engine. See "If your vehicle overheats" in Part 4. The oil pressure gauge indicates engine oil pressure when the ignition is on. Check it while driving to make sure that the needle is in the proper range. If the oil pressure should stay below the normal range, pull off the road to a safe place and stop the engine immediately. Call a Toyota dealer or qualified repair shop for assistance. Oil pressure may not build up when the oil level is too low. The oil pressure gauge is not designed to indicate oil level, and the oil level must be checked using the level dipstick. 59