Flushing the coolant on a regular basis removes gunk and mineral deposits from your engine, while prolonging the life of your heater core, thermostat, hoses and water pump. If you spill coolant when you flush your Sequoia, be sure to put down cat litter to soak it up to discard it. The video above shows you where the petcock on your radiator is located, how to flush the coolant / antifreeze and how to burp the system to get the air out of your Sequoia.Ĭoolant is toxic and animals are attracted to the sweet taste of coolant (antifreeze). When you flush your coolant, which is antifreeze, on your 2002, you are draining out all of the old dirty coolant and preventing costly radiator and cooling system repair down the road. Like the oil in your Sequoia, coolant gets dirty over time and loses its ability to cool down your 4.7 liter engine. Turn off the engine and drain the water, fill up the radiator with antifreeze until you have a 50/50 coolant / distilled water mixture and burp the system. Fill up the radiator with distilled water and run the engine. This video shows where the radiator drain plug (petcock) is located on a 2002 Toyota Sequoia. Start your coolant flush by draining the coolant / antifreeze that is in your reservoir, then drain the coolant that is in your radiator by opening the petcock or removing the lower radiator hose. In addition to preventing your car from overheating, coolant / antifreeze also helps lubricate the seals in the water pump and hoses. Coolant / antifreeze also passes through the heater core under your cowl to provide heat to the cabin of your Sequoia. Coolant / antifreeze circulates through Sequoia radiator and engine to maintain the proper temperature. Rinse away any excess coolant from the engine and the engine compartment.Learn how to flush the coolant (antifreeze) in your 2002 Toyota Sequoia. Inspect the concentration of the engine coolant, using the J 26568. Run the engine at 2,000-2,500 RPM until the engine reaches normal operating temperature. Slowly fill the cooling system with a 50/50 coolant mixture. Important: Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water. If the engine block was drained LY7 engine, install the starter motor. Tighten the drain plugs to 22 N Â m (16 lb ft). If the engine block drain plugs were removed from the LA1 or LY7 engine, perform the following: Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems. Meanwhile, below are the steps to drain coolant from the engine block: Table of Contents. These coatings affect fastener torque and joint clamping force and may damage the fastener. The coolant you can remove from the car is enough, and it’s okay to add new coolant even with remnants in the reservoir. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Replacement fasteners must be the correct part number for that application. Notice: Use the correct fastener in the correct location. "Â Discolored-follow the flush procedure. "Â Normal in appearance-follow the filling procedure. If a complete engine block drain is required LY7 engine, remove the engine block drain plugs.įollow the appropriate procedure based on the condition of the coolant. Drain coolant from Toyota Sequoia/ Tundra Engine block 4.7L. If a complete engine block drain is required LY7 engine, remove the starter motor. If a complete engine block drain is required LA1 engine, remove the engine block drain plugs. Refer to Lifting and Jacking the Vehicle. Important: Draining the cooling system with the pressure cap installed will syphon the coolant from the overflow tank. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot. I have included the drain and fill procedure for your reference.Ĭooling System Draining and Filling Static FillĬaution: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. But the low condition needs to be addressed. It could also indicate a stuck closed thermostat. These should be opened when filling, and can be opened when running to purge air out. It looks like there are possibly two bleeder screws, one in the pipe near the water pump, and possibly one at the upper hose outlet. If the coolant level was low, it could be air in the system. SIMPLE Coolant Drain Fill Radiator Engine Block Toyota 4Runner Fix it Angel Fix It Angel 200K subscribers Subscribe 1.4K 112K views 6 years ago Repair Manuals.
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