: Calling all North* Specialist....Changing out the Alternator

12-12-03, 04:28 PM
I own a 98 Concours with 110,000 on it and Im in need of an alternator, its starting to whine a lil bit (almost like a turbo does) and Im only getting about 12.7 at idle. While Im driving it shows about 13.9-14.2. What Im wondering is, how hard is this thing to change on my own, are there any tricks to gettin it out or should I just let the dealer to the labor, its about 200.00 for labor. Im extremely mechanically inclined and would really like to do it myself- if I can of course. Well thanks in advance for your advice :)

Sean McDonald
12-12-03, 06:22 PM
If anybody can tell me if the Concours is set up the same as the STS then sure I can help. I just did mine. As far as getting it out, I had to take out one rad fan, and there was a small metal plate bolted to the frame below and to the right of the rad. Took the belt off, unbolted the alternator and it eventually came out through that hole.

*edit* Had to remove the battery too.

12-13-03, 06:06 PM
Well the STS would depend on the year. I know up to 97 the frame I think is about the same. I was just wondering did you take the alternator out from the bottom or the top. I could have sworn I saw somewhere where you had to take the tire off and take out the wheel covering and take it out through there. I'd much rather take it out from the top, seems pretty easy to remove the radiator fan to me. So then would you suggest doing it myself or taking it to the dealer? Thanks in advance!!

Sean McDonald
12-13-03, 06:09 PM
Took it out through the bottom. No problems once the rad fan and the battery are out. Had to remove the rubbery protector under the front bumper...it's actually very easy to do. If you are as mechanically inclined as you say you are then you should have absolutely no problems what-so-ever.

12-14-03, 01:05 AM
This is how it's done on a 93 STS...It should be similar....Disconnect the battery. remove 1 15 mm bolt from above to right of
neg. cable to block. Underneath car remove shield on cradle and
then right front corner remove access plate 4 ten mm bolts. Also remove pass side cooling fan two bolts one connector Next
disconnect battery wire on back of alt. remove two 15 or 13 mm bolts
on backside of alt upper one is tight right against manifold
remove lower bolt on alt then twist alt out and line up flat
spots so it will drop down through access. Be careful not to put too
much pressure on the radiator.


12-14-03, 03:10 PM
Need to change mine too...Let me know how it goes.Eric

12-16-03, 05:50 PM
Well I got it all changed. Now I have a steady 13.9 at idle with the lights on. Lets just say it was pretty intresting but Im done. Took about 3 hours but I took my time. Now though I see that at wide open throttle Im losing charge. I start loosing it around about 5500 rpm, never noticed this on the old alternator. Any clues on what might be happening!