The thermostat has a temperature-sensitive spring that causes the thermostat to open and close as the temperature of the coolant changes. This process keeps the engine block at a safe temperature by allowing the coolant to circulate through the engine when needed. When the engine is running, the thermostat stays closed until the engine temperature reaches the operating temperature. The thermostat then opens and allows the coolant to circulate.
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The fluid keeps the gears shifting smoothly and prevents the engine from overheating. This regularly scheduled maintenance requires only a few tools and takes about an hour of time.
Keep up with this work to protect the engine and prevent costly repairs that may happen if the maintenance is ignored. Drive the car for 5 to 10 minutes and park it on level ground. Raise the front of the car up on a pair of jacks to reach the undercarriage of the engine easily. Place the 5-qt. Remove the fill plug and the drain plug with the socket wrench. Wait until all the fluid stops draining from the gear box into the pan.
Replace the drain plug. Place the plastic tube of the fluid pump into the fill plug and squeeze 4 qts. Replace the fill plug with the socket wrench. Lower the car from the jacks. References "Haynes Repair Manual: General Motors: Chevrolet Malibu thru "; Jay Storer; About the Author This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.
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