2009 Toyota Tundra Owners Manual - Page 511

4-3. Do-it-yourself maintenance NOTICE n To prevent serious engine damage Check the oil level on a regular basis. n When replacing the engine oil l Be careful not to spill engine oil on the vehicle components. l Avoid overfilling, as the engine could be damaged. l Check the oil level on the dipstick every time you refill the vehicle. l Be sure the engine oil filler cap is properly tightened. Engine coolant The coolant level is satisfactory if it is between the FULL and LOW lines on the reservoir when the engine is cold. Reservoir cap FULL LOW If the level is on or below the LOW line, add coolant up to the FULL line. n If the coolant level drops within a short time after replenishing Visually check the radiator, hoses, reservoir cap, radiator cap, drain cock and water pump. If you cannot find a leak, have your Toyota dealer pressure test the cap and check for leaks in the cooling system. 484