2007 Toyota 4Runner Owners Manual - Page 376

06 06.08 Winter driving tips NOTICE z If driving through water, such as when crossing shallow streams, first check the depth of the water and the bottom of the river bed for firmness. Drive slowly and avoid deep water. z Take all necessary safety measures to ensure that water damage to the engine or other components does not occur. z Sand and mud that has accumulated in brake drums and around brake discs may affect braking efficiency and may damage brake system components. z Always perform a maintenance inspection after each day of off−road driving that has taken you through rough terrain, sand, mud, or water. For scheduled maintenance information, refer to the "Scheduled Maintenance Guide" or "Owner's Manual Supplement". Make sure your coolant is properly protected against freezing. Only use "Toyota Super Long Life Coolant" or similar high quality ethylene glycol based non−silicate, non−amine, non−nitrite, and non−borate coolant with long−life hybrid organic acid technology. (Coolant with long−life hybrid organic acid technology is a combination of low phosphates and organic acids.) See "Checking the engine coolant level" on page 422 in Section 7−2 for details of coolant type selection. For the U.S.A.-"Toyota Super Long Life Coolant" is a mixture of 50% coolant and 50% deionized water. This coolant provides protection down to about −35_C (−31_F). For the Canada-"Toyota Super Long Life Coolant" is a mixture of 55% coolant and 45% deionized water. This coolant provides protection down to about −42_C (−44_F). Water entering the engine air intake will cause severe engine damage. z Water entering the automatic transmission will cause deterioration in shift quality, locking up of your transmission accompanied by vibration, and ultimately damage. Water can wash the grease from wheel bearings, causing rusting and premature failure, and may also enter the differentials, transmission and transfer case, reducing the gear oil's lubricating qualities. NOTICE Do not use plain water alone. 360 2007 4Runner from Aug. '06 Prod. (OM35866U)