If you're determined to do it yourself, here's a general outline. This is NOT a precise instruction set, and variations may exist depending on the specific model and condition of your vehicle. Consult a repair manual specific to your 1985 Oldsmobile 98 for precise instructions and diagrams:
Tools you'll likely need:
* New ignition tumbler and key set: Make sure you get the correct one for your 1985 Oldsmobile 98. Getting the wrong one will be a waste of time and money.
* Screwdrivers (Phillips and possibly flathead): Various sizes may be needed.
* Ignition switch removal tool: This is highly recommended and specialized for this task. It helps prevent damage to the ignition switch.
* Pliers: Possibly needle-nose pliers for reaching small parts.
* Socket wrench set: May be needed depending on the specific removal process.
* Penetrating oil (like PB Blaster): This can help loosen any rusted or stuck parts.
General Steps (Again, these are GENERAL and may not be exact for your car):
1. Disconnect the Battery: This is the most important safety step to prevent electrical shorts or shocks. Disconnect both the positive (+) and negative (-) terminals.
2. Remove the Steering Wheel (Possibly): Depending on the model, you might need to remove the steering wheel to access the ignition cylinder. This involves removing the steering wheel retaining bolt and possibly a locking plate. This is a complex step and requires specialized tools and knowledge.
3. Remove the Ignition Switch Housing: This typically involves removing screws or trim pieces around the steering column. Be careful not to damage any surrounding parts.
4. Access the Ignition Tumbler: Once the housing is removed, you should have access to the ignition tumbler itself.
5. Remove the Old Tumbler: This is where the ignition switch removal tool comes in handy. It helps to carefully remove the tumbler without damaging the ignition switch mechanism. You might need to gently wiggle or push it out. If it's very stuck, use penetrating oil and let it sit for a while.
6. Install the New Tumbler: Carefully align and insert the new tumbler into the ignition switch. Ensure it's properly seated.
7. Reassemble Everything: Carefully reverse the steps you took to disassemble the system. Pay close attention to how everything goes back together.
8. Reconnect the Battery: After you've reassembled everything, reconnect the battery terminals.
9. Test the Ignition: Try starting your car with the new key.
Warnings:
* Improper installation can damage your ignition system or even immobilize your car.
* If you are uncomfortable with any step, stop and consult a professional.
* If you damage the ignition switch mechanism, you'll likely need to replace that as well, adding significant cost and complexity.
* Always consult a repair manual specific to your 1985 Oldsmobile 98. This is crucial for detailed steps and diagrams.
Again, this is a general guide. For a 1985 Oldsmobile 98, obtaining a service manual is strongly recommended. This manual will provide vehicle-specific instructions and diagrams, greatly reducing the risk of damage. If you're not comfortable with automotive repair, taking your car to a professional is the safest and most reliable option.
