Join Date: Sep 2010
Location: Palm Desert, CA
Re: Alternator case keeps cracking
I would think the bearing would fail before cracking a case. I'd bet your missing a washer or something in mounting putting strain on the case, then vibration of the motor is making is snap.
If it's aligned right you may want to fabricate an outer plate for the alternator that spans the two mounting holes and pulley area to put stress on the bolts instead of the case.
Also keep in mind that large 2inch serpentine belts have a lot of weight and are subject to centrifugal force at high rpms.
67 Galaxie 2d Hardtop x 4
67 Galaxie 2d Converitble x 1
Last edited by tgramm; 11-05-2010 at 09:27 AM.