Cadillac Owners Forum banner

1 - 6 of 6 Posts

·
Registered
86 DeVille (RIP), 89 Brougham D'Elegance, 95 FWB
Joined
·
922 Posts
Discussion Starter #1
Just wondering, my 89 Brougham has had a strong whirring noise for some time, related to the RPM of the engine it seems. I can't pinpoint where the noise is coming from, it seems to be from all over. It's probably from the transmission, but I'm just wondering if anyone else has had a similar problem on these cars and found a less troublesome solution. When coasting, the car is very quiet, but the instant i step on the gas, i hear the noise.

Somewhat annoying, but I usually have the radio loud enough to drown it out.
 

·
Registered
1979 Coupe Deville
Joined
·
414 Posts
One possibility could be the alternator. They make a whirring, high-pitched sound when some of the internal components are going out. What you're describing sounds just like my Firebird did last year. I rebuilt the alt and problem went away.
 

·
Registered
1992 Town Car Cartier & 2014 Accord LX MTX
Joined
·
34,087 Posts
One of the bearings in my alternator went earlier this year and made the same noise you described. Changed with the engine speeds and sounded like a constant whine...like a supercharger!

I had a local electical shop rebuild my alternator and replace that bearing...cost me $45!
 

·
Super Moderator
2014 ELR
Joined
·
9,838 Posts
Well, to figure out if it is the alternator: take the belt off, and go for a quick drive around the block. You should know right away. Don't go far without that belt!
 

·
Registered
86 DeVille (RIP), 89 Brougham D'Elegance, 95 FWB
Joined
·
922 Posts
Discussion Starter #6
It's not much of a whine as much as it is a low pitched whirring. A really heavy noise. I'll try the alternator thing tomorrow, but I don't think that's it. I have another high pitched whir from the AC compressor pulley, but that goes away when the clutch locks up on it.
 
1 - 6 of 6 Posts
Top