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Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.
In this video, we're going to show you how to replace the A/C serpentine belt on this 2003 Subaru Outback, which has the 2.5 litre motor, and the only tools you'll need are a 10mm and 12mm sockets with a ratchet and a 6 inch extension.
Use a 10mm socket and ratchet or a wrench and remove two bolts: one from here and one over here. There may also be a nut here; it seems to be missing on my vehicle. Okay, now I'm using a 12mm socket with an extension and a ratchet. I'm going to loosen this bolt here. This allows this shield to come right off; then there's another 12mm bolt right under here, under this adjusting bolt. Loosen that, and then loosen this bolt.
Now, fast forward here as I just loosen that adjusting bolt, and as you loosen it you'll see the belt start to loosen. You do need to loosen it way up, in order to peel that belt off the alternator and then remove it. Pull the belt right off. Now, down in here, we're going to want to loosen this bolt here. Now my 12mm has an extension on here, which makes it a little easier, on that adjustment bolt here. Turn that counterclockwise. Again, just fast forward it here. As you turn that bolt counterclockwise, again the belt will loosen up until you can take it off of the A/C compressor and then the crank pulley as well.
Now, you probably want to loosen up your tensioner bolt all the way. Put your new belt right down in. The belt on this car is actually fine; I just need to replace the tensioner. Make sure that it's in the grooves on the crank pulley here. Pull it up; put it in the grooves of your A/C compressor, and right on, and then tighten up your tensioner bolt. Then, as you start getting it tighter, you want to take the belt, press on it, and you want it to move between an eighth and a quarter of an inch. Then tighten up the pulley bolt down here. Then we put some penetrant on here, to make it a little easier to turn things. Loosen this up further.
I'll put on my old belt; it's still in good shape. New belts from 1A Auto are the exact same length and dimensions, so they'll go right on. Put it on. Sometimes it's easier actually to get it on to the two larger pulleys first, then onto the alternator. Make sure it's on all the pulleys correctly, and now just tighten up this tensioner bolt, and once you have that tightened, there's about a quarter of an inch of play up and down. Tighten up this bolt to lock it in place.
Then I'll fast forward this here as we just finish it up. I put the metal bracket back on, slide it behind that bolt in the alternator, and then put the 10mm bolt in the top, and tighten those up and then put the plastic shield back on, and use 10mm bolt, and also there's probably another 10mm nut that was missing on my vehicle, that you would need to tighten up.
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