Tools You'll Likely Need:
* Socket set (metric)
* Ratchet and extensions
* Wrenches (metric)
* Screwdrivers (Phillips and possibly flathead)
* Possibly a torque wrench
* Possibly a crankshaft pulley holder
* Safety glasses and gloves
* New pickup coil (ensure you get the correct part number for your specific engine)
* Possibly a multimeter for testing the old and new coil
General Steps (Consult Your Repair Manual for Precise Details):
1. Disconnect the Battery: This is crucial to prevent electrical shocks and damage. Disconnect the negative (-) terminal first.
2. Access the Distributor: This is the most challenging part, varying depending on the specific Blazer model. You'll likely need to remove parts like the air cleaner assembly, possibly parts of the intake manifold (carefully!), and potentially some wiring harnesses to gain sufficient access. Again, your repair manual is essential here.
3. Remove the Distributor Cap: Carefully remove the distributor cap. Note the position of the rotor and wires; you'll need to put them back exactly the same way. Take pictures if necessary.
4. Remove the Distributor Rotor: The rotor is typically held on by a single screw or clip. Remove it carefully.
5. Remove the Distributor: The distributor is usually held in place by bolts. You may need a special tool or technique to hold the crankshaft pulley to prevent it from rotating while removing the distributor hold-down bolts. This is often the most difficult part, requiring patience and possibly specialized tools.
6. Remove the Pickup Coil: The pickup coil is located inside the distributor. The method of removing it varies by distributor design, but it's typically held in place by screws, clips, or simply pressure-fit. Carefully remove it and note how it was installed.
7. Install the New Pickup Coil: Install the new pickup coil in the exact same orientation as the old one. Pay close attention to any alignment marks or tabs.
8. Reassemble the Distributor: Carefully reassemble the distributor, rotor, and cap, making sure everything is properly aligned as it was before.
9. Reconnect the Distributor Cap Wires: Reconnect the wires to the distributor cap in the same order they were removed. Incorrect placement can lead to misfiring and damage.
10. Reconnect the Battery: Reconnect the battery's negative (-) terminal.
11. Test the System: Start the engine and check for proper operation. If the engine doesn't start or runs poorly, double-check your work, particularly the wiring connections. A multimeter can help test the new pickup coil for proper function.
Important Considerations:
* Repair Manual: This is absolutely essential. The steps above are very general. Your specific Blazer model will have variations in access and procedures.
* Safety: Always prioritize safety. Wear safety glasses and gloves. Work in a well-ventilated area.
* Torque Specifications: Use a torque wrench to tighten bolts to the manufacturer's specified torque. Over-tightening can damage components.
* Professional Help: If you are not comfortable performing this repair yourself, take your Blazer to a qualified mechanic. Incorrect installation can cause further damage to your engine.
This process can be complex and requires mechanical skill. If you're unsure about any step, consult a professional. Improper repair can lead to significant engine damage.
