Here's a general procedure. Note: Variations may exist depending on the specific engine (small block, big block) and any aftermarket modifications. Consult a repair manual specific to your 1985 Chevy C10 for detailed diagrams and torque specifications.
Tools You'll Need:
* Socket wrench set (metric and/or standard, depending on your truck)
* Ratchet and extensions
* Wrenches (various sizes)
* Screwdrivers (Phillips and flathead)
* Pry bar (possibly)
* Wire brush
* Battery terminal cleaner
* New starter motor
* Jack and jack stands (highly recommended)
* Gloves and safety glasses
Procedure:
1. Disconnect the Battery: Disconnect the negative (-) battery cable first. Then, disconnect the positive (+) cable as an extra precaution.
2. Access the Starter: The starter is usually located on the passenger side of the engine block, near the bellhousing (where the engine connects to the transmission). You may need to remove some components to get better access. This could include:
* Air cleaner assembly: Remove this to provide better visibility and access.
* Exhaust components: Depending on your truck's configuration, some exhaust components might need to be loosened or removed.
* Wiring harnesses: Carefully move any wiring harnesses out of the way to avoid damage.
3. Remove the Starter:
* Disconnect the electrical connections: There are usually two large cables connected to the starter. Carefully disconnect these using a wrench. Note their positions for reassembly.
* Remove the starter bolts: There are typically two or three bolts holding the starter to the engine block. Use your socket wrench to carefully remove these bolts. The bolts might be difficult to reach; use extensions if necessary. Sometimes, the bolts are recessed, requiring a specific socket or extension.
* Remove the starter: Once the bolts are out, the starter should be free to come out. However, it can sometimes be stuck due to corrosion or rust. A pry bar might be necessary to gently lever it free. Be careful not to damage anything!
4. Install the New Starter:
* Clean mounting surfaces: Use a wire brush to clean any corrosion or debris from the engine block and the starter mounting surface.
* Install the starter: Carefully align the new starter and bolt it to the engine block, using the same holes as the old starter.
* Tighten the bolts: Tighten the bolts securely to the manufacturer's specified torque (check your repair manual).
* Reconnect the electrical connections: Carefully reconnect the two large cables to the new starter, making sure they're securely attached.
5. Reassemble: Reinstall any components you removed to access the starter (air cleaner, exhaust, etc.).
6. Reconnect the Battery: Reconnect the positive (+) battery cable, and then the negative (-) cable.
7. Test the Starter: Turn the ignition key to the "start" position. The engine should crank. If not, double-check all connections.
Important Considerations:
* Repair Manual: A repair manual specific to your 1985 Chevy C10 is highly recommended. It will provide detailed instructions, diagrams, and torque specifications, making the process much easier and safer.
* Safety: Always disconnect the battery before working on the electrical system. Be aware of moving parts. Use jack stands for safety when working under the vehicle.
* Corrosion: Corrosion is a common issue with starters. Clean all connections thoroughly before reassembly.
* Torque Specifications: Over-tightening bolts can damage the engine block or starter. Use a torque wrench to ensure proper tightening.
If you're not comfortable performing this repair yourself, it's best to take your truck to a qualified mechanic. Attempting this repair without proper knowledge or tools can lead to damage or injury.
