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Is it possible to use a good alternator from an old car in a different car, as long as everything bolts up ? Answered

My alternator went out in my 1992 Olds 98 Regency. I do have a good alt in my 1987 Cadillac DeVille, but the amps for both are 104-120 amps for the Olds, & 160 amps for the Caddy. Was hoping to be able to use the good one from the Caddy in the Olds.

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NachoMahma
NachoMahma

Best Answer 11 years ago

.  They are both GM and only 5 years apart, so there's a real good chance that it will work. If the electrical connection(s) is the same, you have an even better chance of success.
. The position of the pulley is important. Make sure the belt runs straight and true.
.  The "extra" amps are unimportant. The alternator will only put out as many amps as are called for.
.  I'm too lazy to do it, but you should be able to go to an online auto parts store and search for a 160A alternator for the Olds and a 160A for the Caddy. If the part numbers are the same, you're good to go.

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NachoMahma
NachoMahma

Answer 11 years ago

.  And the pulleys need to be close to the same diameter. If too big, you may not have enough juice at idle. If too small, you may over-rev the alt.

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MahavishnuMan
MahavishnuMan

11 years ago

They're both CS series alternators, so the electrical is the same.  At most, you'll only have to change the pulleys if they're a different size or don't have the same number of ribs.  If it bolts up the same, go for it.

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kat49242
kat49242

Answer 11 years ago

Great tip about the pulleys, hadn't thought about being able to switch them. Thanks!

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Re-design
Re-design

11 years ago

Well they are both GM cars.
Do they have the same connections?  If so then it will probably be fine.