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Let's grab a laser beam and fix that squeaking belt! SAY WHAT!? In this video we use a laser pulley alignment tool to identify a misaligned pulley on this GMC 6.0 that is causing one nasty belt squeal. One of the most over looked items when folks are trying to diagnose a belt squeal is pulley alignment. As you will see in this video, it doesn't take much. -Enjoy!
OTC Tools 4529 Power Steering Pump Pulley Service Set: http://amzn.to/2CtJ3a2
Dayco 93874 Timing Belt Diagnostic Kit: http://amzn.to/2CwX5aX
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Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not South Main Auto Repair

49 thoughts on “Tool time: squealing belts, laser beams and pulley alignment, what!?”
  1. Avataaar/Circle Created with python_avatars Humberto Hernández says:

    What if you just bought one of those long stainless steel meter rulers and just confirmed that they line up correctly? 🤔 Seems it could work

  2. Avataaar/Circle Created with python_avatars Neodiy.c0m says:

    Did it cause the car engine to vibrate somehow?

  3. Avataaar/Circle Created with python_avatars Danny Cole says:

    I have that kit. Found a problem on a jeep with that. The ac compressor was starting to come apart. AC worked and wasn't noisy, but the play was moving.

  4. Avataaar/Circle Created with python_avatars ابو رامي شفيع says:

    Please my brother please

  5. Avataaar/Circle Created with python_avatars ابو رامي شفيع says:

    I'm having a problem with a car that doesn't work, please help me, I'm from Saudi Arabia, I'm a mechanic

  6. Avataaar/Circle Created with python_avatars Krewl Works says:

    love the commentary.

  7. Avataaar/Circle Created with python_avatars Michael Wulfestieg says:

    bit car how to video i have ever seen. 100% would recommend off personality alone

  8. Avataaar/Circle Created with python_avatars Alex M says:

    I don't remember where I learned it, but if you are pressing or pulling someing with a screw type tool (like the pulley press in this video), and you get to a point where it is too hard to tighten, you can tap the end of the screw with a hammer. The shock from the hammer is sometimes enough to finish the job, or at least get another 1/4 turn. Note: this method is not without risk, if you hit too hard you can damage the thrust bearing on the shaft.

  9. Avataaar/Circle Created with python_avatars Kaibil66 says:

    Thank you so much for your tutorial, my chevy astro had the same problem, I
    re adjusted the power steering pump pulley and the noise disappeared. You are the best, best wishes for you from Las Vegas, NV. Take care man.

  10. Avataaar/Circle Created with python_avatars Kaibil66 says:

    Great video, very professional job. 👏

  11. Avataaar/Circle Created with python_avatars Rick Badessa says:

    What about a serpentine belt that only squeaks for about 30 seconds then goes away

  12. Avataaar/Circle Created with python_avatars Nex1 says:

    Hello Good Stuff my question is my yolk is sticking out a bit so since I have have it flush I should be pulling it out a bit correct? Thanks

  13. Avataaar/Circle Created with python_avatars Antonio Claudio Michael says:

    Sounds good now No squeaks or Chirps Good video Eric O @SouthMainAutoRepairLLC

  14. Avataaar/Circle Created with python_avatars Antonio Claudio Michael says:

    That chirp and Squeal is pretty bad sounds like a bad bearing to me @SouthMainAutoRepairLLC

  15. Avataaar/Circle Created with python_avatars Abe Vigoata says:

    "A belt so quiet you can hear the leaky exhaust manifolds now" – lol, I so hate cars (ha).

  16. Avataaar/Circle Created with python_avatars Eric G says:

    Yes those 6.0 are super fuel efficient. Like 7 miles to the gallon

  17. Avataaar/Circle Created with python_avatars Bill Sand says:

    Just want to say your analysis of the source of the problem, and how to correct it was superb…My vehicle is no longer shredding serpentine belts! Problem was power steering pulley was 1/8" from flush.'

  18. Avataaar/Circle Created with python_avatars Kevin Renn says:

    I know I'm a few years late but from the video it looks like the alternator pulley is 'out of plane' Does that happen? How would you fix that?

  19. Avataaar/Circle Created with python_avatars Electromagnetizery says:

    This turned out to be my problem. The guy I bought the car from had straight-edged the pulleys but the grooves were still out of alignment. Belt squeeled like a banshee. I pushed the pulley in to match the shaft and problem solved. Thanks South Main Auto Repair

  20. Avataaar/Circle Created with python_avatars Electromagnetizery says:

    Dude sounds like Beetlejuice and Ave had a baby.

  21. Avataaar/Circle Created with python_avatars TheyCallMeGunny says:

    Thank you, this video helped me diagnose my engine bay squeal (alternator belt pulley alignment.) Didn't help me fix mine, though. But I finally know what the problem is: And that's been my problem all along (not knowing or being able to diagnose the source of the noise.)
    Mine rotated from tensioning it over the years. The method to tension it is to leverage a crowbar against the alternator, but it has gradually caused a very slight twisting of the mount over time (1-2 degrees maybe, it's visible but only barely.) Trying to think of how I can fix this without breaking anything lol.

  22. Avataaar/Circle Created with python_avatars Anthony Sholars says:

    Thank you. I was tired of buying $80 fan belts. I bought a laser beam and pulley alignment tool.

  23. Avataaar/Circle Created with python_avatars B Souza says:

    Yo

  24. Avataaar/Circle Created with python_avatars Beach&BoardFan says:

    What if your pulleys are aluminum or titanium?

  25. Avataaar/Circle Created with python_avatars Mal Daley says:

    I had to laugh around the 20 minutes mark you said that you'd have to move the pulley has "gotta go just a smidge, just a hair. not a red one tho" !! In Scotland, the land of the redheads, we say "just a baw hair" meaning just "a testicle hair"……

  26. Avataaar/Circle Created with python_avatars Mike Studmuffin says:

    So what prevents the pulley from pulling back out?

  27. Avataaar/Circle Created with python_avatars Sean Collins says:

    Mate I’m in Australia and without the beam I can see they are not aligned!!!

  28. Avataaar/Circle Created with python_avatars william bellamy says:

    you can clean them pulley grooves with acetone

  29. Avataaar/Circle Created with python_avatars Lelet Ipiham says:

    Thanks, but I’m not clear how you do to the big pulley

  30. Avataaar/Circle Created with python_avatars Shane says:

    I think I might prefer the belt squeal over the 8 other noises it masked.

  31. Avataaar/Circle Created with python_avatars Greg Hamilton says:

    Baby powder will stop a belt squeal. Of course if things are out of line It won't help long term!

  32. Avataaar/Circle Created with python_avatars Robert Hubbard says:

    2 mins, alternator looks crooked but might just be camera angle

  33. Avataaar/Circle Created with python_avatars Brian Walter says:

    My '97 k1500 with a 5.7 was doing this, I took it to a shop and they couldn't figure it out. That didn't stop them from charging me. Gave me dirty looks when I came back.

    Watched this video and checked the power steering pulley, it was in too far by one quarter inch. Got it set in the right place as you describe and haven't heard a single squeak since. Thanks Eric O!

  34. Avataaar/Circle Created with python_avatars SFCD says:

    glad to know im not the only one that grunts, yells, swears and drops things

  35. Avataaar/Circle Created with python_avatars Gary Gruber says:

    Never point a laser at a camera. You will fry the camera sensor.

  36. Avataaar/Circle Created with python_avatars the reptile guyz says:

    Add a job that was very similar to that 1 and it did up being the crankshaft What's spinning a little faster Then the outside of the crankshaft The harmonic balancer was literally Starting to separate And I said it had been doing it for months

  37. Avataaar/Circle Created with python_avatars WELSHENTERPRISE says:

    Sounds like dumb want a be. Who can't read.

  38. Avataaar/Circle Created with python_avatars Thomas McLemore says:

    Grannies on Waze right