1. Assessment:
* Identify the problem: Is the hinge completely broken (sheared pins, broken metal), or is it just loose? A loose hinge might just need tightening, while a broken one requires more extensive repair.
* Check the door: Make sure the door isn't binding or hitting anything else that might be contributing to the hinge problem.
* Gather tools: You'll need sockets (likely metric), wrenches, a screwdriver (possibly Phillips and flathead), a hammer, possibly a punch, and potentially a replacement hinge (if necessary). Penetrating oil (like PB Blaster) will be very helpful.
2. Accessing the Hinge:
* Interior Panel Removal: You'll likely need to remove the interior door panel to fully access the hinge. This usually involves unscrewing several screws around the panel's edges. Consult a repair manual specific to your 1998 Blazer for precise instructions, as the process can vary slightly.
* Be careful: There are often clips and connectors behind the panel. Gently pry them apart, avoiding breaking them.
3. Repair Options:
* Tightening: If the hinge is just loose, tighten the bolts that secure the hinge to the door and the body. Use penetrating oil beforehand to loosen any rusted or stuck bolts.
* Repairing a broken hinge: This is more challenging. The options depend on what's broken:
* Broken bolt: If a bolt has sheared, you may be able to drill it out carefully (using the right size drill bit to avoid damaging the hinge). Then, use a helicoil or time-sert to repair the damaged threads. Alternatively, you might need to replace the entire hinge.
* Broken hinge pin: If the pin is broken, you may be able to carefully remove the broken pieces and replace it with a new pin (often a standard size that can be found at a hardware store). You may need to use a punch and hammer.
* Broken hinge metal: This is the worst-case scenario. You'll most likely need to replace the entire hinge.
4. Replacing the Hinge (if necessary):
* Remove the broken hinge: Carefully remove the bolts securing the broken hinge. This can be difficult if the bolts are rusted or stripped.
* Install the new hinge: Align the new hinge with the existing holes and securely bolt it in place.
* Reinstall the door panel: Put the door panel back on, making sure all clips and connectors are properly seated.
5. Testing:
* Open and close the door: Ensure the door opens and closes smoothly and that the hinge is secure.
Important Considerations:
* Repair Manual: A repair manual specific to your 1998 Chevy Blazer is highly recommended. It will provide detailed instructions, diagrams, and torque specifications. This will save you time and prevent potential damage.
* Safety: Support the door while working to avoid injury. Use jack stands if necessary to keep it stable.
* Professional Help: If you're uncomfortable with any of these steps, it's best to take your Blazer to a qualified mechanic. Replacing hinges can be tricky, and improper repair could lead to further damage or safety issues.
Remember safety first, and if you're not confident in your abilities, seeking professional help is always the safest option.
