Another Alternator Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76bonanza · 10-06-2004, 06:06 PM

I have had this proform alternator for about a year. The last few days I have noticed it is making kind of a whine or howl at idle it is still putting out a really good charge.

Do they do this sometimes or should I be concerned?

hilbilly · 10-06-2004, 06:10 PM

I'd guess bearings

MylilBowTie · 10-06-2004, 07:44 PM

I 2nd the bearings, I had mine replaced because I was tired of hearing it whine.

gchemist · 10-06-2004, 08:52 PM

Once the bearings fail it's kaput.

cliffsta · 10-06-2004, 10:41 PM

is your battery bad? If its spinning and working hard to charge a dead battery it will squeal.

76bonanza · 10-07-2004, 07:35 AM

Not that I know of cliffsta battery seems fine never had any problems with it. There is an alt. repair place in town is it fairly cheap to replace the bearings?

hotrodhomi · 10-07-2004, 10:00 AM

yes, its cheap you could do it yourself if you have access to a press, its real easy. If not I would take it apart and bring in the housing. they should be able to do it in like 10 minutes if they are slow.

10-06-2004, 06:06 PM	#1
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Another Alternator Question I have had this proform alternator for about a year. The last few days I have noticed it is making kind of a whine or howl at idle it is still putting out a really good charge. Do they do this sometimes or should I be concerned? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

10-06-2004, 07:44 PM	#3
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	I 2nd the bearings, I had mine replaced because I was tired of hearing it whine. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

10-06-2004, 08:52 PM	#4
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Once the bearings fail it's kaput. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

10-06-2004, 10:41 PM	#5
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	is your battery bad? If its spinning and working hard to charge a dead battery it will squeal. __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

10-07-2004, 07:35 AM	#6
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Not that I know of cliffsta battery seems fine never had any problems with it. There is an alt. repair place in town is it fairly cheap to replace the bearings? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

10-06-2004, 06:10 PM	#2
hilbilly I do everything twice, so what Join Date: Mar 2004 Location: To the Right. One may go as far to say WAY to the Right Posts: 378	I'd guess bearings

10-07-2004, 10:00 AM	#7
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	yes, its cheap you could do it yourself if you have access to a press, its real easy. If not I would take it apart and bring in the housing. they should be able to do it in like 10 minutes if they are slow.



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