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If the belt is only touching 1/3 of the alt pulley, something is out of alignment. And no, you don't have to use a Honda Alternator. Since the belt is only on a portion of the pulley, that is what caused it to break.
What I suggest is to first confirm you have the correct alternator for your vehicle. Second, check to see if there is something causing a misalignment. The belt should sit fully on the pulley, so something is causing the alt to be off.
Here are the directions specific to your vehicle for replacing the alternator. I'm adding them so you can see the process and how everything should be mounted.
2005 Honda Civic L4-1.7L SOHC
Replacement
Vehicle Starting and Charging Charging System Alternator Service and Repair Procedures Replacement
REPLACEMENT
Alternator Replacement
1. Make sure you have the anti-theft codes for the radio, then write down the customer's radio station presets.
2. Disconnect the negative cable from the battery.
Pic 1
3. Remove the adjust plate mounting bolt (A), locknut (B), and mounting bolt (C), then remove the power steering (P/S) pump belt (D) and pump without disconnecting the P/S hoses.
Pic 2
4. Disconnect the 4P connector (A) and alternator cable (B) from the alternator.
Pic 3
5. Loosen the adjusting boll (A), and remove the lock bolt (B) and mounting bolt (C), then remove the alternator belt and alternator.
6. Install in the reverse order of removal.
7. Adjust the alternator belt tension or the alternator-A/C compressor belt tension.
8. Enter the anti-theft codes for the radio, then enter the customer's radio station presets.
9. Set the clock.
10. Do the engine control module (ECM)/powertrain control module (PCM) idle learn procedure.
Check that and let me know what you find.
Take care,
Joe
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Monday, January 4th, 2021 AT 12:11 PM
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