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Where is the thermostat located on a 2002 Oldsmobile Alero 2.2 liter engine?

The 2002 Oldsmobile Alero 2.2L engine's thermostat is located on the engine, typically on the lower intake manifold or at the very bottom of the engine itself, near the water pump. It's not easily accessible and requires some mechanical skill to reach and replace. You'll likely need to remove some parts to get to it.

It's not a visually obvious part, so a repair manual specific to a 2002 Oldsmobile Alero 2.2L is highly recommended to locate it precisely and to guide you through the replacement process. Searching online for "2002 Oldsmobile Alero 2.2L thermostat replacement" with images will also likely show you pictures of its location.