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When was the Aternator brush/regulator unit replaced? They usually last 100K miles.

Easy job, can be done with the alternator in the car. Easier if the oil filter is out, like during an oil change. I usually remove the heat shield from the exhaust manifold, too.

Disconnect the battery negative cable first.

The brush/reg unit is the black thing on the rear of the alternator. The two machine screws that hold it in place face the rear, and are either Philips head or Torx. Power screwdriver helps, it is an odd angle to get at.

If you decide to pull the alternator, have three new accessory mount bushings on hand. It's a good time to do them, too. Two in the alternator mount ears, one inside the adjusting link where it bolts to the block.

Everything goes back togdther without forcing. If the brushes balk, try another angle. They must ride on the slip rings. Which reminds me, while the brushed are out, use a mirror and flashlight to see inside the alternotor to check the condition of the slip rings. Small pits can be dressed out.

Good Luck,

Bob

:>)