experience with rebuilt ac delco alternator
the last time I had the Bonneville in at the dealer for service the mechanic noted the alternator was making a bit of bearing noise (but still charging fine). As far as I know it is the original. So I purchased an ac delco rebuilt alternator over the counter from the gm dealer and this weekend I put it in.
But it doesn't work. It does not maintain proper voltage (voltage is low). My battery is good (recently replaced - it was due) and I'm confident the rest of the electrical is good because old alternator was working fine (just bearing noise). I checked voltage from alternator case to ground to confirm good ground circuit and checked voltage from positive post on alternator to positive post on battery to confirm good battery cable.
Pulled the rebuilt unit out and put the old one back in, voltage back to normal.
The weird thing is the rebuilt unit must be doing something, cause it was generating a huge amount of heat, ran the engine for just a couple minutes while doing the voltage checks and the rebuilt alternator was just frying hot - it was actually smelling like it was melting inside. when I went to pull it to put back the original one, I had to wear mechanics gloves and I could still hardly hold it long enough to pull it out and put it on the ground, it was so hot.
I've already talked to the gm dealer, they will bring in another rebuilt one and exchange it, has to come from Edmonton, should be here by Wednesday.
Anyone else had any similar experiences? thanks, Mike
1995 White Bonneville SSEi