Here's a general overview. Specific steps and difficulty may vary, and consulting a repair manual specific to your year and engine is *highly recommended*. This should not be taken as a definitive guide, but rather a general outline:
Tools You'll Likely Need:
* Socket wrench set (metric): Various sizes, including deep sockets.
* Ratchet: A good quality ratchet will make the job much easier.
* Extensions: To reach those hard-to-get-to bolts.
* Wrench set (metric): For various nuts and bolts.
* Jack and jack stands: Crucial for safety and access.
* Wheel chocks: To secure the vehicle.
* Penetrating oil (like PB Blaster): To loosen stubborn bolts.
* Wire brush: To clean battery terminals and starter connections.
* New starter motor: Make sure you get the correct one for your Eldorado's engine.
General Steps (Consult your repair manual for precise details and diagrams):
1. Safety First: Disconnect the negative battery cable. This is paramount to avoid electrical shocks.
2. Access the Starter: This is often the most challenging part. The starter is typically located on the engine block, usually towards the bottom, near the transmission bell housing. You'll likely need to:
* Raise the vehicle: Use a jack and jack stands to safely lift the front of the car. Never work under a car supported only by a jack.
* Remove some components: You may need to remove parts like the air intake components, possibly some heat shields, or even parts of the exhaust system to gain adequate access. This is where a repair manual is essential.
3. Disconnect the Electrical Connections: Locate the large battery cable(s) and the smaller wire connected to the starter solenoid. Carefully disconnect them, making note of how they are connected. Take photos if necessary.
4. Remove the Starter Bolts: There are usually two or three bolts holding the starter motor to the engine block. Use penetrating oil if necessary and carefully remove the bolts. Some bolts might be difficult to reach.
5. Remove the Starter: Once the bolts are removed, gently wiggle the starter free. It may be snug, so be patient.
6. Install the New Starter: Install the new starter in reverse order of removal, ensuring the electrical connections are correctly attached.
7. Reconnect the Battery Cable: Reconnect the negative battery cable.
8. Test the Starter: Attempt to start the engine.
Important Considerations:
* Repair Manual: A repair manual specific to your 1990 Cadillac Eldorado is invaluable. It will provide detailed diagrams, torque specifications, and step-by-step instructions.
* Torque Specifications: Tighten the starter mounting bolts to the correct torque specification. Over-tightening can damage the engine block.
* Professional Help: If you're not comfortable working on your car, consider having a qualified mechanic perform the repair. Starter replacement can be more complex than it appears.
This is a simplified overview. Improperly performing this repair could lead to damage to your vehicle or personal injury. Always prioritize safety and consult a repair manual before attempting any automotive repair.
