What is a good expectation for life of an alternator? I've got a 93
Sub C1500 with a 105 Amp Delco Reman with 76k miles on it. Bearings
are fine so I suspect the brush life will dictate the life. Any ideas
on this? I don't want to be surprised on the road and will change it
out as a PM project if I'm within the window of life expectancy range.
What is the ECS series? There is the DN, SI, CS, and AD series of
alternators. The OPs 105 would be a CS130 alt. I would suggest since this
is a 'burb that he upgrade to a CS144 140 amp unit with appropriate fused
charge lead and add the remote sense lead if GM so lovingly left it out on
his model as they did on our '94 C1500 pickup and '97 Lumina.
Sorry.. This would be the CS series of compact high output alternators.
The "E" was extraneous.
Lots of bearing failures with these. BUT, if he has enough room under
the hood that this alternator can stay cool, it explains why his has lasted
If that had been one of the ECS series, you might have been changing them
a couple of times per year, at least in some applications.
Going this long tells me that this is not the case, so this alternator could
live a long time still.
Some people say "dont fix it if it ain't broke". There is some wisdom to
that. You could have a plethora of different possible failures on the road,
and you probably cant afford to repair or replace everything that can go
You can probably replace the brushes, bearings, and regulator yourself,
or take it in to a local alternator shop and have them freshen it up for you
if you are concerned about it.
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