Belt Drive Assembly Help

[mjferencak]

Can someone take a video of their belt drive assembly for a few seconds on the I5 engine? I'm having an issue, I think, with my belt tensioner and A/C clutch. My belt tensioner is constantly on the move, it shakes viciously. And may A/C clutch looks like it's loose when it's engaged. The engine sounds like a rattle can all the time and worst when the A/C clutch is engaged. I've replaced the belt tensioner but it didn't seem to fix the problem. I don't hear valve noise on top of the engine and I don't hear main/connecting bearings. The pulley has no play in it, so I'm thinking it may be the A/C compressor clutch.

 

[Bowser-II]

Try this about five seconds after startup. Mine usually has a slight whisper since I changed the belt and tensioner.

https://1drv.ms/v/s!Akg1xSXPQqxx_HAWhecAlbgReE4k

This is my one drive account rather than uploading it.


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[mjferencak]

Your video didn't have audio but for the two seconds of what I could see of your belt tensioner, it was steady and not jumping up and down like mine. I'll post a video soon

 

[Bowser-II]

Your video didn't have audio but for the two seconds of what I could see of your belt tensioner, it was steady and not jumping up and down like mine. I'll post a video soon

Hmm that's odd.




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[Bowser-II]

Let me know if you want me to try again


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[mjferencak]

https://youtu.be/G9edR26qlzk

Ignore the fan air noise. It's the rattle noise that's the problem plus the jumpy belt tensioner.

 

[alrock]

If you've got noise that you cannot pinpoint, a stethoscope goes a long way towards finding the source. Also, does the noise change with a/c on vs. off?

 

[mjferencak]

The noise gets worst when the A/C clutch is engaged. I'm not sure if its the A/C making the noise or something else but when the A/C adds load to the assembly the noise gets worst so does the jumping belt tensioner. It's about time for that 4BT conversion I suppose. I got to pay off the wife's Charger then I can go Cummins crazy.

 

[Guerrero]

Hello mjferencak,

I have a very similar noise in mine, its happen only when the H3 is in hot weather and high load of engine..like in trail at low speeds. I replaced 10000 miles ago the tensioner, belt and idler pulley. I had then a noise that its similar to a rattle but a low rattle. Now the noise that I get in trails I think is the fan clutch when load. You can try...put off the fan clutch and fan and starts the Hummer. If the noise was gone, then your fan clutch needs replace. If not...then I suggest you a tensioner, belt and idler pulley replace.

Hope that helps you out!
Guerrero

 

[mjferencak]

I will definitely try the fan clutch approach. If it is, I'll pull the trigger on a electrical fan.