That really depends on what brand and model of alternator, If you have a good battery and electrical system your alternator should go until its ball bearings or brushes wear out. newer Ford alternators last about 130-180,oookm, GM products CS130D (96-up) delco alternators will go about 200-240,ooo km and Chrysler (nippondenso) about the same or a bit better then the GM Delco. The GM and Chry will go till they wear out bearings or brushes, while the Fords usually by this time have worn thru the copper Sliprings on the rotor inside requiring a new rotor or replace the alternator completely
how do you replace the alternator in a 97buick skylark
Charge it, replace it,test the alternator,Charge it, replace it,test the alternator,
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How do you replace the alternator on a 1988 Pontiac Fiero
To replace the alternator belt on a Citroen Berlingo, you have to locate the tensioner. You can loosen it to replace it.
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how do you replace an alternator on an 1999 Saab 9-3
1. Suspect the belt is loose. Tighten it or use belt dressing. 2. Bearings are worn out on the alternator. Replace the alternator. 3. Poor workmanship on a rebuilt alternator. Replace the alternator.
To replace the alternator on a 1995 Honda Civic disconnect the battery. Disconnect the wiring from the alternator. Loosen the adjustment bracket so the belt has slack. Remove the alternator belt along with the mounting hardware. Pull the alternator and replace it.