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(1) Unhook the battery cables, positive terminal first, using an 8mm ratcheting spanner, and then an 8mm socket spanner with extension (2in) on the negative. (2) Unbolt the positive cable on the back of the alternator (generally on a 3,1L V6 it will be on the passenger side near the cowl or firewall) with a 13mm socket spanner (3) Unhook the clip containing a bundle of wires connecting to your ECM (also on the back) (4) Loosen the lower front bolt near the bottom of the alternator bracket, below the serpentine belt, with a 13mm socket spanner (5) Loosen the lower rear bolt on the bracket, using a 13mm socket spanner on the rear and a 13mm spanner on the front; the socket will retain the nut on the back of the bolt (6) If the belt is still not loose CAREFULLY loosen the belt tensioner only enough to loosen the belt to remove the alternator, keeping track of the turns needed (7) Bolt the new alternator onto the bracket, front bolt first, then rear, but do not tighten completely (8) Slip the belt over the pulley of the new alternator (9) CAREFULLY tighten the belt tensioner and ONLY until it stops turning easily. Do not overtighten. If in doubt use a torque wrench. (10) Reposition the alternator so that the belt is fairly tight but still has a slight amount of play in the belt. (11) Tighten the bolts on the lower bracket back all the way. (12) Plug the ECM connector back into the socket on the back (there should be four pins) (13) Tighten the nut over the positive cable on the back of the alternator (14) Reconnect the negative battery cable (15) Reconnect the positive cable (16) Attempt to start the car. If the engine starts, congratulations. If not, recheck steps 7 through 15 carefully.

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โˆ™ 2006-05-20 23:55:33
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Q: How do you replace the alternator on a 1998 Chevy Monte Carlo?
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