Alternator Decoupler Pulley repair HOW THEY WORK fix

HOW IT WORKS is slightly different than I said on the video. After looking it over extensively, the thick spring inside only purpose it to dampen the blow from the belt turning the pulley to the alternator's resistance to turning. So this would reduce vibrations and extent belt life. The outside skinny spring is always binding outwards with the pulley; keeping it locked. So default is pulley locked. Reverse rotation coils up that smaller spring and reduces it's size, disengaging the pulley. I looked it over extensively off camera and I came to the conclusion these are dry assemblies. Any lubrication(other than bearing) would hinder it's operation. Stuff I used in the video: Decoupler pulley REMOVER kit: amzn.to/3RArgGV DODGE Chrysler Pulley I bought: amzn.to/3Px9ZM9 FLUX CAPACITOR Delorean owners only: amzn.to/3PUvGXU

Watch for Mo; Stay for Ginger.

Best channel on YouTube!!! Thanks for the great content!!! I grew up kind of poor and had to learn to fix things for my self. Your channel has been such a big help!

I love the clip of you and Ginger trail riding at the end! It is wonderful to see someone love their dog as much as you do.

Very cool! I always appreciate your inclination to take something apart and figure out a fix or replacement. I’ve come to the conclusion that many times it’s just parts that a human assembled and I can duplicate it if I have the patience to examine it carefully enough to figure out how it goes together.

Make sure which way the pulley catches and which way it freewheels BEFORE you disassemble it. You don't want it freewheeling in the wrong direction when you put the springs in backwards.

Very cool! Always enjoy breaking down old parts to find what the failure was. I haven't had the joy of seeing or dealing with this style of pulley. Thank you!

Man your a good teacher, God Bless You.

Thank you. Always LOVE to see how things work. If we don't know, diagnosing issues is next to impossible. You RoCK!

Super topic for a video! I never had to replace one of these nor have I personally had a issue with one…yet! If I do, I am using your fix idea. $20 vs $300-$1000. It’s a no brainer! Thanks man!

Always a treat when you post a new video! Haven't worked on modern cars in a while, but if I do, I'm more informed because of your video. Thanks!

Thanks for the education on the de-coupler clutch. I've been working on cars since the early 60's and have never run into this failure. I didn't even know the pulley was a clutch. Now I even know that you CAN repair them. You have just shown an old dog a new trick. I'm 76 and still learning. In my life I have re-built engines, auto and manual trannys, rear ends, brakes, drive shafts, alternators, starters, etc - virtually every system in a car or truck, and you just taught me something. I give this video 5 stars, and have subscribed.

I like the way you think

I have read that these pulleys are to extend belt life and reduce vibration. Engines don't rotate at a constant velocity throughout the revolution. And this is supposed to reduce belt oscillation

Mercedes Benz tech here. I've replaced a few alternators because of the one way clutch. I've only seen them on diesels and you can tell when they fail because the belt will chirp loudly at idle due to a diesels crankshaft speed fluctuating at idle. The one way clutch allows to pulley to slip during the rapid deceleration of crank speed as the next cylinder in the firing order is coming up on its compression stroke. Once the engine is off idle the belt doesn't chirp since the engine speed is more consistent.

Next time I’m told it’s three weeks and $400 for another alt.replacement, I will be pulling the bearing out. Thanks for that.

I’ve spent countless hours pulling stuff apart just to see how it works too. I just can’t help myself 😂. You dog is so proud of his stick👍👍 Cheers mate, Stuart 🇦🇺

Great video. My 2002 VW TDI had one of these fail at around 80k. It made a terrible squeak before it finally failed after starting it up one morning. It didn't take out the serpentine belt. I would rather take the fuel economy hit vs. dealing with this.

Great way to tell how this alternator works

Slick fix!