Safety First:
* Disconnect the negative battery cable before starting any work. This prevents accidental shorts and shocks.
* Wear safety glasses to protect your eyes from debris.
* Use jack stands to securely support the vehicle. Never work under a vehicle supported only by a jack.
Tools You'll Need:
* Jack and jack stands
* Wrench(es) – likely 13mm, 15mm, and possibly others depending on your specific Blazer (check repair manual)
* Socket set and ratchet
* Extension(s) for your ratchet
* Possibly a breaker bar for stubborn bolts
* Wire brush (to clean terminals)
* New starter motor
* Penetrating oil (like PB Blaster)
Procedure:
1. Access the Starter: The starter on a 1993 S10 Blazer 4.3L V6 is typically located on the passenger side of the engine, towards the bottom, near the bell housing (the part connecting the engine to the transmission). You'll likely need to work from underneath the vehicle.
2. Prepare the Area: Use the jack and jack stands to lift and securely support the vehicle. Clear the area around the starter to provide ample working space.
3. Disconnect the Battery Cables: Locate the positive (+) and negative (-) battery cables connected to the starter. Use the appropriate wrench to disconnect both cables.
4. Remove the Starter: This is where things get tricky and vary slightly depending on the specific year and model. Generally, you'll need to:
* Locate the starter mounting bolts: These are typically two bolts securing the starter to the engine block. They may be difficult to reach. Use penetrating oil to loosen any rusted bolts if needed and give them ample time to soak in.
* Remove the starter mounting bolts: Carefully remove the bolts using the appropriate wrench or socket.
* Disconnect the wiring harness: There will be at least one electrical connector attached to the starter. Carefully disconnect this connector. Sometimes a small retaining clip needs to be compressed.
5. Remove the Old Starter: Once the bolts are removed and the wiring harness is disconnected, carefully remove the starter from its position. It might be a tight fit.
6. Install the New Starter:
* Compare the new starter to the old one: Make sure they match exactly.
* Install the new starter: Carefully position the new starter in the same location as the old one.
* Reconnect the wiring harness: Securely connect the wiring harness connector.
* Tighten the mounting bolts: Tighten the mounting bolts to the manufacturer's specified torque (check your repair manual). Do not overtighten.
7. Reconnect the Battery Cables: Reconnect the positive (+) and negative (-) battery cables to the starter.
8. Lower the Vehicle: Carefully lower the vehicle using the jack.
9. Test the Starter: Reconnect the negative battery cable. Attempt to start the engine. If it doesn't start, double-check all connections and look for any obvious problems.
Important Considerations:
* Repair Manual: A repair manual specific to your vehicle is crucial. Pictures and diagrams are invaluable, especially when dealing with tight spaces.
* Stubborn Bolts: If bolts are extremely stubborn, you may need to use a breaker bar or impact wrench. Be careful not to strip the bolt heads.
* Cleanliness: Clean the starter mounting area before installing the new starter to ensure proper contact.
This is a general guide, and the specifics might vary slightly. Always prioritize safety and consult a repair manual before attempting this repair. If you're not comfortable performing this repair yourself, take your Blazer to a qualified mechanic.
