Keep an eye on your Metco Pulley. EDIT: Use Threadlocker - Pulley Bolts Loosened

Discussion in 'SRT Hellcat Builds' started by weebz, Sep 24, 2016.

  1. weebz

    weebz Gold Member Hellcat Supporting Vendor

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    I was able to avoid tragedy today by picking up on an unusual noise. I pulled the car out of the garage to go check my mail at my shop. I walked around the front of the car to shut the garage door and everything sounded fine. I drove 7 miles, got out of my car to walk to the mailbox and I heard a frightening chattering sound. It was obviously coming from the supercharger snout in the area of the pulley. Against my better judgement, I very carefully drove the car back home. My fear was that the bearing was going out on my brand new installed Metco upper pulley. After closer inspection I was able to tell that 2 of the 6 bolts holding the pulley on the hub had backed out about 40% of the way and the other four backed out 10%. We were able to back to 6 bolts out take the pulley off which did have significant damage around the bolt holes from the chattering. We were still concerned about further damage and bearing damage as a result of this pulley coming loose.After we put Loctite on the 6 bolts and got everything back together it sounded normal but I am concerned about bearing wear.
    Please do an inspection of your metco pulleys, it wouldn't hurt to put a allen wrench on the bolts and give them a turn to see if they have moved. I also dabbed each bolt with red fingernail polish for a quick visual inspection.
    As you can tell from the picture below, I had damage around all 6 bolt holes which is evidence that all 6 screws backed out some.
    Catastrophe avoided!

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    20160924_184318.jpg 20160924_201036.jpg
     
    Last edited: Sep 25, 2016
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  2. ArchGE

    ArchGE Silver Member

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    Looks like the lock washers spun on soft metal. That's pretty bizarre.
     
  3. cole3986

    cole3986 Gold Member

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    why would you think there would be bearing damage? Are your sure that they were properly torqued?
     
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  4. 19Dart69

    19Dart69 Silver Member

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    Did the bolts originally have loctite on them when they were first installed? Highly unlikely there's any bearing damage.
     
  5. Racist Cat

    Racist Cat Gold Member

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    I used blue loctite on all mine, and the cover bolt.

    Was very disappointed there was no torque value given.
     
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  6. weebz

    weebz Gold Member Hellcat Supporting Vendor

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    Any time you have parts spinning at high a very high speed and the drive pulley comes loose and is now wobbeling and spinning untrue, you will certainly transfer that unbalanced load to the bearing which would indeed be your next failure. At this point it looks like we avoided bearing damage.
     
  7. cole3986

    cole3986 Gold Member

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    The belt tensioner would absorb the wobble, since it is still attached and on the hub, I doubt the wobble could be that severe.
     
  8. TallCool1

    TallCool1 Gold Member Hellcat Car Club Nat'l Hellcat Tech Advisor HCC Charter Member

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  9. Viper04

    Viper04 Silver Member

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    Weebz
    Just asking did you use loctite on all the bolts? Matco provides some with all there pulleys. I can't tell from the first picture. It's just odd that with loctite and a lock washer they would all back out. Good you found it in time.
     
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  10. Wack_Cat

    Wack_Cat Silver Member

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    I use high heat race lock tight
     
  11. J Schiz

    J Schiz Hellcat Member

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    wassup with the white can man...looks lik n old dog terd
     
  12. weebz

    weebz Gold Member Hellcat Supporting Vendor

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    Wow! Here we go. Dude your car looks like you dropped a piano on it and you want to knock a feature that most of us have.
    You have insulted the thread, but what you have done to your car is unspeakable!
    Go find a tunner site to hack, your not wanted here.
    Educate yourself before you come back.
     
    Last edited: Sep 27, 2016
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  13. PlumTexasCrazy

    PlumTexasCrazy HELLCAT LIFE MEMBER Hellcat Car Club HCC Charter Member

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    Weebz, was any lock tight detected, before u corrected and installed?? Hope all is well!! Great save!!!
     
  14. weebz

    weebz Gold Member Hellcat Supporting Vendor

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    If there was locktite it was minimal, there were some minor indications. Perhaps one of the greatest failures may have been, must have been, that the bolts were not tight enough.
     
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  15. PlumTexasCrazy

    PlumTexasCrazy HELLCAT LIFE MEMBER Hellcat Car Club HCC Charter Member

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    I didn't realize, there is no torque spec! Great info and thanks for sharing!!
     

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