Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW1987L7 (E23) L6-3430CC 3.4L SOHC (M30)REPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTCOOLING SYSTEMENGINE - COOLANT TEMPERATURE SENSOR/SWITCHCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)TESTING AND INSPECTION
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Testing and Inspection
1. Remove sensor and immerse sensor element in suitable temperature controlled solution.
2. Connect ohmmeter across sensor terminals using suitable adapters, and monitor sensor resistance as temperature changes.
3. Resistance should be as follows:
8200 - 10,500 ohms at 14°F,
2200 - 2700 ohms at 68°F,
300 - 360 ohms at 176°F.
4. If resistance is not within specifications, sensor is defective.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.