The Location of an Engine Coolant Sensor in a 1998 Malibu

In 1997, Chevrolet released an all-new, front-driven Malibu. In 1998, the Malibu came standard with a 150-horsepower, 2.4-liter engine, and had the option of a 150-horsepower, 3.1-liter V-6. Both engines had two coolant sensors, an engine coolant temperature sensor and a coolant level sensor. The temperature sensor measures the temperature of the coolant in the engine, while the coolant level sensor measures the amount of coolant in the coolant overflow tank.

Engine Coolant Temperature Sensor

The engine coolant temperature sensor on the 1998 Malibu's 2.4-liter engine is screwed into the engine block, right next to the thermostat housing -- toward the rear of the engine compartment. The 3.1-liter engine's ECT sensor is on top of the thermostat housing.

Coolant Level Sensor

The coolant level sensor on both of the 1998 Malibu's engines is part of the coolant overflow tank. To replace this switch, you must remove and replace the entire coolant tank, as the switch is non-serviceable.

Coolant Specifications

After replacing either sensor, refill the coolant overflow tank with a Dex-Cool and clean water mixed in a 50-50 ratio.