D 350 Pickup L6-359 5.9L DSL (1989)
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
Coolant Temperature Switch Removal and Installation
LOCATION A (INTAKE MANIFOLD)
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Disconnect wiring
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Remove thermistor
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Apply liquid teflon sealant to threads.
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Tighten the thermistor
Torque Value: 24 N-m [18 ft-lbs]
LOCATION - B (HEAD WATER JACKET)
WARNING: Wait until the temperature is below 50°C [120°F] before removing the coolant system pressure cap. Failure to do so can cause
personal injury from heated coolant spray.
Drain the coolant system by opening the drain valve on the radiator. A drain pan with a capacity of 20 liters [5 U.S. gallons] will be adequate to
hold the coolant.
Disconnect the thermistor wiring harness. Clean the area around the thermistor thoroughly.
