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.
1993 Cadillac Eldorado V8-300 4.9LFACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
ECT:
Important
^ Care must be taken when handling the ECT sensor. Damage to the ECT sensor will affect proper operation of the fuel injection system.
^ A non-hardening sealer should be applied to the sensor threads prior to installation to prevent coolant leaks. Use P/N 1050805 or equivalent.
Remove or Disconnect
1. Partially drain cooling system.
2. ECT sensor connector.
3. ECT sensor at engine.
Install or Connect
1. ECT sensor at engine.
Tighten
^ Torque ECT sensor to 20 Nm (15 lbs. ft.).
2. ECT sensor connector.
3. Refill coolant system.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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