2008 Mercury Mountaineer V6 4.0L Alternator TRQ ALA94465

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In this video, we're going to be working with our 2006 Ford Explorer 4.6L V8. We're going to show you how to remove and replace your vehicle's alternator. If you like this video, please click subscribe. We have a ton more information on this and many other vehicles. If you need parts for your car, you can follow the link down the description over to 1AAuto.com. Here are the items you'll need for this repair.

Using a 13mm socket and ratchet, loosen the clamp on the ground side of the battery and remove it. You want to isolate it off to the side somewhere where there's no risk of it getting back onto the battery while you work.

Loosen the clamp on the air box side of the intake duct with a flat blade screwdriver. You'll then want to disconnect the breather lines. There's a little green tab here that you just pull back and pop them off. You'll then need to undo the clamp on the throttle body. You'll then want to remove the intake duct.

For some jobs like your alternator or idler pulleys, it may not be necessary to remove the belt fully. However, if the pulley has been dragging from a bad bearing or a weak alternator, it's probably damaged your belt a bit too and it's not a bad idea to replace it while you're in here.

Using a 1/2" drive ratchet, place it into the square drive of the serpentine belt tensioner and rotate the tensioner clockwise to release pressure and remove the belt from one of the pulleys. It's usually easiest to do this from a smooth pulley. Then carefully release tension and remove your ratchet. Remove the serpentine belt from under the A/C compressor and then pull the loop up and through over your tensioner. You'll then want to get it out from under the crack where it loops over the water pump. You've already unhooked it from the idler pulley on this side so loop it out from the grooved idler pulley and the power steering pump and remove your belt.

Disconnect the throttle position sensor. To do this you'll need to remove the red lock tab on the connector. Then push down to release the plug. On the opposite side, we'll remove the connector to the stepper motor that operates the throttle. Remove the four 8mm bolts securing the throttle body to the intake manifold. When the bolts are out, remove the throttle body from the vehicle.

Pop off the harness retainers going along this brace over the alternator. You can use a trim tool or flat blade screw driver to do this. We'll then remove the two 8mm bolts with an 8mm socket, ratchet, and extension. We'll then remove the two 10mm bolts. We'll then remove the entire stiffening bracket from the vehicle. Then remove the two 13mm nuts at the bottom of the alternator with a 13mm socket and ratchet. We'll then pull the alternator forward and rotate it until we can access the connectors on the back. We'll then unplug the black connector at the top and undo the 10mm nut and the power stud. Remove the power terminal and remove the alternator from the vehicle.

Reinstall your alternator. Reconnect the connector as well as the power stud and the 10mm nut. Rotate the alternator back down onto its studs. Reinstall the stiffener bracket as well as the two 8mm and two 10mm bolts. We'll tighten the 8mm bolts but we're only going to leave the two 10s in and tight for now. Reinstall the two 13mm nuts at the bottom of the alternator. We'll tighten those down as well with a 13mm socket and ratchet. You can now tighten the two 10mm bolts.

Reinstall the throttle body and the four 8 mm bolts. Torque these bolts to 89 inch-pounds. Make sure the clip is in the throttle position sensor connector. Plug it in and push the tab back down to engage it, and reconnect the stepper motor on the throttle body.

Now reinstalling the serpentine belt on this is going to be pretty difficult to show. You want to start with a loop and send it down and around the crank pulley. Now you're going to take the passenger side of the belt and bring it down between the tensioner and the A/C compressor at the bottom of the motor. With the right side of the belt, you're going to go up and over the water pump pulley all the way to the button of the motor on the driver side, where you'll go under the grooved idler pulley, as well as under the power steering pump pulley. Install your 1/2" drive into the tensioner and rotate it clockwise to release the belt tension. It's usually easiest to get over the alternator, then move your hand to the other side of the engine and go under the smooth idler pulley on the driver side, and then just use a light or your hand to check the belt path and make sure that everything went over and under all the pulleys currently and that it isn't hung up anywhere.

Reinstall the intake duct and pop on the two breather connections, then tighten it down with a flat blade screwdriver.

Reconnect the negative battery terminal and tighten it down with a 13mm socket and ratchet.

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