1993 Pontiac Sunbird Owner's Manual - Page 133
1993 Pontiac Sunbird Manual
Page 133 highlights
Problems on the Road NOTICE: ~ I Engine damage from running your engine without coolant isn't covered by your warranty. If there seems to be no leak, check to see if the electric engine fan is running. If the engine is overheating, the fan should be running. If it isn't, your vehicle needs service. How to Add Coolant to the Coolant Recovery Tank-2.01 14 Engine If you haven'tfound a problem yet, but the coolant level isn'tat or above the FULL COLD mark, add a 50/50 mixture of clean water (preferably distilled) and a proper antifreeze at the co'olantrecovery tank. (See Coolant in the Index for more information about the proper coolant mix.) NOTICE: In cold weather, water can freeze and crack the engine, radiator, heater core and other parts. Use the recommended coolant. I When the coolant in the coolant recovery tank is at or above the FULL COLD mark, start your vehicle. If the overheat warning continues, there's one more thingyou can try.You can add the proper coolantmix directlyto the thermostat housing, but be the sure cooling system is cool before you do it. 1 3 2