Here's a general guide; you'll need a socket wrench set (likely 13mm, 15mm, and possibly others), a ratchet, extensions, and possibly a breaker bar depending on how rusted the bolts are. You may also need a wire brush to clean corrosion from the terminals.
1. Locate the Starter: The starter is usually located on the passenger side of the engine block, near the bellhousing (the area where the engine connects to the transmission).
2. Disconnect the Battery Cable: This is CRUCIAL. Disconnect the negative (-) battery cable first.
3. Disconnect the Starter Wiring: There will be at least one, and possibly two, wires connected to the starter. These are usually held on by bolts or nuts. Carefully remove these connections. Take a picture or make a note of how they are connected to avoid mistakes during reassembly.
4. Remove the Starter Bolts: There are typically two bolts holding the starter in place. They might be hard to access, requiring extensions on your ratchet and potentially a wobble extension to get the right angle. These bolts often seize, so you may need a penetrating oil (like PB Blaster) applied several hours beforehand. If they are extremely stubborn, a breaker bar might be necessary.
5. Remove the Starter: Once the bolts are loose, the starter should come away from the bellhousing. It might be a bit snug, so gently wiggle it free.
6. Clean the Starter Mounting Surface: Use a wire brush to clean any corrosion from the starter mounting surface on the engine block. This will help prevent future seizing.
7. Install the New Starter (if applicable): If you're replacing the starter, install the new one, ensuring it's correctly seated.
8. Reconnect Everything: Reconnect the starter wiring, making sure everything is tight and secure. Reconnect the battery cable.
9. Test the Starter: Attempt to start the engine to ensure the new starter is working properly.
Important Considerations:
* Engine Type: The exact location and access to the starter bolts will depend on your specific engine. A repair manual specific to your 1991 Chevy S-10 with the correct engine is highly recommended. Pictures and diagrams are invaluable.
* Rust and Corrosion: The bolts holding the starter in place are notorious for seizing due to rust and corrosion. Be prepared for this and use penetrating oil liberally.
* Safety: Always disconnect the negative battery terminal before starting any electrical work. Be careful not to drop tools into the engine compartment. If you're not comfortable doing this yourself, take it to a qualified mechanic.
Remember, this is a general guide. Always consult a repair manual specific to your vehicle for detailed instructions and diagrams. Improper installation can lead to further damage.
