Having problems with your 1988 Oldsmobile Delta 88 ?

Rattle at stop lights

\015 Coming from the alterator\015 Posted / edited by AnonymousUser on : 11-12-2017

Answers :

Could be the alternator bearings, there are two of them, one inside in the front, one inside in the back.
You can sometimes tell by using a mechanic's stethoscope, which is a long screwdriver or an long thin stick.
Place one end on the alternator (when the motor is running) and the other end in your good ear.
A bad bearing will scream at you.
The other think more likely is a worn out belt.
They make an awful noise sometime when the rubber gets hard.
The can chatter, squawk, and other sounds mimicking the alternator.
Also, be sure to check the belt for cracks on the inside surface.
Changing the belt is cheaper that replacing the alternator, if you'd care to try the least expensive fix first, and you still aren't sure.
Repair Help & Product Troubleshooting for 1988 Oldsmobile Delta 88

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