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The Sound of a bad alternator
Numerous threads on this topic. Few sound clips or videos. So thought I would post mine. Engine is 1989 3.2 . The sound is quite horrible but does disappear with higher revs. Thought is was chain noise on the left side, so checked that and even replaced the tensioner (had an extra). No change. Then pulled the fan belt : Voila.
https://youtu.be/kboKTcM3KH4 |
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03-06-2018, 05:57 AM
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Kind of Blue
Join Date: Sep 2010
Location: Delaware
Posts: 2,310
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Mine was dead silent. The battery light would occasionally show a faint flicker at idle. When I smelled sulfur from overcharging was when I knew it was time to replace it.
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1971 911T w/ a 2.7 (ITBs, EFI, a bunch of other stuff, 2180 pounds with fuel) 2024 Ford Bronco Raptor |
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03-06-2018, 06:41 AM
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76 911S Targa
Join Date: Oct 2010
Location: Idaho
Posts: 1,150
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Sounds like the bearings are worn and the fan is occasionally dragging on the housing. The bearings are cheap and replaceable. Or you can wait like I did and replace the whole alternator in the parking lot of a motel.
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76 911S, 2.7, Bursch Thermal Reactor Replacements, Smog Pump Removed, Magnecors, Silicone Valve Cover Gaskets, 11 Blade Fan, Carrera Oil Cooler, Turbo Tie Rods. |
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03-06-2018, 09:57 AM
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Quote:
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03-07-2018, 04:37 AM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,116
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Quote:
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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, 993SS cams, Borg-Warner S366 turbo @ 1.2-1.5 bar, depending on mood  , Treadstone full bay IC, 70mm TB, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MicroSquirt AMP'd w/GM smart coilpack, Bilstein coilovers, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
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03-07-2018, 06:09 AM
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