1985-1998 [Subscribe to Daily Digest] |
 | [Main 9000 Bulletin Board | BBFAQ |
Prev by Date | Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: New whirring sound - alternator? '93 9000 Turbo Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Mon, 3 Jan 2005 06:11:25
In Reply to: New whirring sound - alternator? '93 9000 Turbo, techlectic, Sun, 2 Jan 2005 20:41:23 Members do not see ads below this line. - Help Keep This Site Online - Signup |
As the others have said, a bunch of possibilities. I'd put my money on an idler pulley before the alternator. Another possibility is that the serpentine belt is out of alighnment and rubbing - this can be due to a bad harmonic balancer (main pulley).
Step 1 - open the hood and look in (engine off). See where the serpentine belt goes around, and where it goes through the bracket on the tensioner pulley. Do you see rubber shavings? Does the belt look worn? Get yourself a foot or two of hose - I like an old piece of garden hose, something on that size - 0.75 to 1.5 inches. Start the car. Does the serpentine belt run in the middle of the idler pulleys, or off to one side? It should run in the middle. Hold one end of the hose to your ear, and CAREFULLY move the other end around the belt side of the engine. It'll act as a stethescope, and help isolate the sound.
If the belt is running off-center, it could be a busted bolt on the tensioner body, or the harmonic balancer coming apart. To check the balancer, with the engine off, draw a chalk line on the face of the pulley, from the bolt to the outer edge. This is the big, lowest pulley. Start the car a few times. If the line at the outer edge no longer lines up with the line on the inner part, the pulley is coming apart. The other clue is the rubber sandwiched between the inner and outer parts is cracked, and the outer part of the pulley isn't flush with the inner part.
I find the belt tensioner and idler pulleys start to go after around 60-80K miles or so. Some last longer. I don't like running a serpentine belt longer than 60K or about 4 years. If you take the belt off, spin the pulleys and see how the bearings feel - you know immediately when you have a bad bearing.
posted by 192.249....
, Mon, 3 Jan 2005 06:11:25 <-- Viewing This Message
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
 |
 |
 |
 |
 |
